Document:

Exhibit
4.1

 

DESCRIPTION
OF THE REGISTRANT’S SECURITIES

REGISTERED
PURSUANT TO SECTION 12 OF THE SECURITIES

EXCHANGE
ACT OF 1934

 

General

 

We
are currently authorized to issue up to 1,500,000,000 shares of Common Stock, and 50,000,000 shares of preferred stock, par value $0.0001
per share, of which none were issued and outstanding as of the date of this Annual Report. All of our issued and outstanding shares have
been validly issued, fully paid and non-assessable.

 

Our
bylaws permit the board of directors to issue the whole or any part of any unissued balance of the authorized capital stock. Our certificate
of incorporation permits us to increase or decrease the number of authorized shares of Common Stock by the affirmative vote of the holders
of a majority of the stock of the Company entitled to vote.

 

Common
Stock

 

Voting
Rights

 

Holders
of our Common Stock are entitled to one vote for each share held on all matters submitted to a vote of our stockholders. Holders of our
Common Stock have no cumulative voting rights. Further, holders of our Common Stock have no preemptive, conversion, redemption or subscription
rights and there are no sinking fund provisions applicable to our Common Stock.

 

Liquidation
Rights

 

In
the event of our liquidation, dissolution or winding-up, holders of our Common Stock have the right under Section 281 of the Delaware
General Corporation Law to a ratable portion of assets remaining after satisfaction in full of the prior rights of our creditors, all
liabilities and the total liquidation preferences of any outstanding shares of preferred stock.

 

Dividends

 

Subject
to preferences that may be applicable to any outstanding shares of preferred stock, holders of our Common Stock are entitled to receive
dividends, if any, as may be declared from time to time by our board of directors, or board, out of our assets which are legally available.

 

Preferred
Stock

 

Our
Certificate of Incorporation authorizes 50,000,000 shares of preferred stock, par value $0.0001 per share, of which none were issued
and outstanding as of the date of this registration statement. The board of directors is authorized to provide for the issuance of these
unissued shares of preferred stock in one or more series, and to fix the number of shares and to determine the rights, preferences and
privileges thereof. Accordingly, the board of directors may issue preferred stock which may convert into large numbers of shares of Common
Stock and consequently lead to further dilution of other shareholders.

 

On
November 22, 2020, certain stockholders representing more than 50% of our outstanding share capital approved the elimination of the our
entire authorized class of fifty million (50,000,000) undesignated preferred stock, thereby reducing the total number of shares of capital
stock that we may issue from one billion five hundred fifty-thousand (1,550,000,000) shares to one billion five hundred thousand (1,500,000,000)
shares, all of which are designated as common stock (the “Certificate of Elimination”). The Certificate of Elimination will
be effective upon the filing with the Secretary of the State of Delaware, which was not completed as of the date of this annual report’s
filing.

 

Warrants
and Options

 

	 	●	options
                                                                              to purchase 45,511,888 shares of our Common Stock, at a weighted average exercise price of $0.05 per share; and

	 	●	warrants
to purchase 23,628,962 shares of our Common Stock, at a weighted average exercise price of $0.05 per share.

 

    	 

     

    

 

Convertible
Promissory Notes

 

In
the last three years, we issued convertible promissory notes in an aggregate principal amount of $1,700,000 in a series of convertible
loan agreements.

 

Anti-Takeover
Provisions

 

The
provisions of Delaware law, our Certificate of Incorporation and our Bylaws may have the effect of delaying, deferring or discouraging
another person from acquiring control of the Company. These provisions, which are summarized below, may have the effect of discouraging
takeover bids. They are also designed, in part, to encourage persons seeking to acquire control of us to negotiate first with our board
of directors. We believe that the benefits of increased protection of our potential ability to negotiate with an unfriendly or unsolicited
acquirer outweigh the disadvantages of discouraging a proposal to acquire us because negotiation of these proposals could result in an
improvement of their terms.

 

Amended
and Restated Certificate of Incorporation and Amended and Restated Bylaw Provisions

 

Our
amended and restated certificate of incorporation and our amended and restated bylaws include a number of provisions that could deter
hostile takeovers or delay or prevent changes in control of our management team, including the following:

 

	●	Board
    of directors’ vacancies. Our Certificate of Incorporation provides that vacancies on the board of directors may be filled
    only by the affirmative vote of a majority of the directors then in office, irrespective of whether there is a quorum, or by a sole
    remaining director. Additionally, the number of directors to serve on our board of directors is fixed solely and exclusively by resolution
    duly adopted by our board of directors. This would prevent a stockholder from increasing the size of our board of directors and then
    gaining control of our board of directors by filling the resulting vacancies with its own nominees. This makes it more difficult
    to change the composition of our board of directors but promotes continuity of management.
	 	 
	●	Special
    meetings of stockholders. Our Certificate of Incorporation currently provides that special meetings of our stockholders may be
    called by the board of directors acting pursuant to a resolution approved by the affirmative vote of a majority of the directors
    then in office, and special meetings of stockholders may not be called by any other person or persons.
	 	 
	●	No
    cumulative voting. The Delaware General Corporation Law provides that stockholders are not entitled to the right to cumulate
    votes in the election of directors unless a corporation’s certificate of incorporation provides otherwise. Our amended and
    restated certificate of incorporation does not provide for cumulative voting.
	 	 
	●	Amendment
    of charter provisions. Any amendment of our Certificate of Incorporation requires the affirmative vote of the majority of the
    outstanding shares of capital stock entitled to vote on such amendment, and the affirmative vote of the majority of the outstanding
    shares of each class entitled to vote thereon as a class. Amendments to the Bylaws may be executed pursuant to a resolution by the
    board of directors pursuant to an affirmative vote of a majority of the directors then in office, or by the affirmative vote of at
    least 75% of the outstanding shares of capital stock entitled to vote.

 

	●	Issuance
    of undesignated preferred stock. Our board of directors has the authority, without further action by the stockholders, to issue
    up to 50,000,000 shares of undesignated preferred stock with rights and preferences, including voting rights, designated from time
    to time by our board of directors. The existence of authorized but unissued shares of preferred stock, which may be converted into
    large numbers of shares of Common Stock, would enable our board of directors to render more difficult or to discourage an attempt
    to obtain control of us by means of a merger, tender offer, proxy contest or other means.

 

	●	Delaware
    Business Combination Statute. The Company is subject to the “business combination” provisions of Section 203 of the
    Delaware General Corporation Law. In general, Section 203 prohibits a publicly held Delaware corporation from engaging in a business
    combination with an interested stockholder for a period of three years following the date such person becomes an interested stockholder,
    unless the business combination or the transaction in which such person becomes an interested stockholder is approved in a prescribed
    manner. Generally, a “business combination” includes a merger, asset or stock sale, or other transaction resulting in
    a financial benefit to the interested stockholder. Generally, an “interested stockholder” is a person that, together
    with affiliates and associates, owns, or within three years prior to the determination of interested stockholder status did own,
    15% or more of a corporation’s voting stock. The existence of this provision may have an anti-takeover effect with respect
    to transactions not approved in advance by our board of directors, and the anti-takeover effect includes discouraging attempts that
    might result in a premium over the market price for the shares of our Common Stock.
	 	 
	●	Exclusive
    forum. Unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware
    is the sole and exclusive forum for (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim
    of breach of a fiduciary duty owed by any of our directors, officers or other employees to us or our stockholders, (iii) any action
    asserting a claim arising pursuant to any provision of the Delaware General Corporation Law, our amended and restated certificate
    of incorporation or our amended and restated bylaws, or (iv) any action asserting a claim against us governed by the internal affairs
    doctrine. This choice of forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds
    favorable for disputes with us or our directors, officers or other employees, which may discourage such lawsuits against us and our
    directors, officers and other employees.

 

Transfer
Agent and Registrar

 

The
transfer agent and registrar for our Common Stock is Worldwide Stock Transfer, LLC, with a mailing address of One University Plaza, Suite
505, Hackensack, NJ 07601, and a facsimile number of (201) 820-2010,

 

Listing

 

Our
Common Stock is quoted on the OTCQB under the symbol “CTGL.” We have applied to list our Common Stock on the Nasdaq Capital
Market. No assurance can be given that our application will be approved or that a trading market will develop.Exhibit 10.2

 

<TRANSLATION FROM KOREAN>

 

Equipment Purchase Agreement

 

 

 

This Equipment Purchase Agreement (“Agreement”) is
made and entered as of February 10, 2022 (the “Effective Date”) by and between Solar Window Asia Co., Ltd. as the
buyer (“Buyer”) and WI-A Corporation as the seller (“Seller”) pursuant to the principle of mutual
good faith, and the Parties hereby agree to diligently perform this Agreement as follows:

 

Article 1 (General Terms)

 

1. The purpose of this Agreement is to determine all matters and procedures
necessary for Seller to supply to Buyer, and Buyer to purchase from Seller, the equipment specified in Article 2 hereof (the “Equipment”).

 

2. This Agreement may only be amended by written agreement between the
Parties.

 

3. This Agreement sets forth the general matters relating to the supply
and purchase of the Equipment between the Parties, and it shall also apply to any discrete individual contracts with respect to the Equipment
(including such as purchase orders; collectively “Individual Contract”) unless otherwise agreed between the Parties,
and the Parties shall comply with this Agreement and Individual Contract. If there is any conflict between this Agreement and Individual
Contract, this Agreement shall prevail.

 

Article 2 (Equipment and Order)

 

1. Equipment: OPV R2R Coating & Patterning System

 

2. Buyer shall issue to Seller a purchase order for the Equipment within
7 days from the date of this Agreement.

 

3. Buyer shall order the Equipment via a purchase order form determined
by Buyer, and the purchase order shall specify the date of order, name of the Equipment, quantity, delivery date and place, inspection
method and time, etc.; provided that, the Parties may agree on the terms and conditions applicable to Individual Contract in a written
form other than the purchase order.

 

4. Seller shall notify its acceptance of the purchase order to Buyer within
7 days upon receipt thereof, and the purchase order shall be deemed accepted as is if Seller fails to notify Buyer within the said period.

 

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5. If the purchase order is not acceptable by Seller, the Parties shall
mutually discuss and determine applicable terms and conditions and shall again go through the order and acceptance procedures.

 

Article 3 (Term)

 

This Agreement shall take effect as of the Effective Date and remain effective
for a period of 12 months. Unless either Party notifies the other Party, either orally or in writing, its intention to extend the term
of this Agreement at least 1 month before expiration of then-effective term, this Agreement shall automatically expire at the end of
its then-effective term.

 

Article 4 (Delivery, Installation and Acceptance Test)

 

1. After Seller has delivered the Equipment to Buyer in compliance with
the delivery date and place set forth in the purchase order, the Equipment shall be subject to Buyer’s incoming inspection. Seller
shall provide Buyer with transaction specification and any other materials related to delivery as requested by Buyer upon delivery of
the Equipment.

 

2. Upon receipt of notification of passing of Buyer’s incoming inspection,
Seller shall promptly install and SET-UP the Equipment at the place designated by Buyer.

 

3. Upon completion of installation and SET-UP of the Equipment, Buyer shall
conduct the Acceptance Test (the “A/T”) on the Equipment to test its reliability. If Buyer deems that the Equipment is fit
for use for mass production based on the result of A/T, Buyer shall provide Seller with a written confirmation of A/T completion (the
“Confirmation of A/T Completion”).

 

4. The A/T shall be conducted within 3 months after completion of delivery,
installation and SET-UP of the Equipment.

 

5. Seller shall fully cooperate with Buyer so that the A/T can be smoothly
conducted, including such as aid in human resources. Seller shall respond without any delay to Buyer’s demand to cure any defects
discovered in the Equipment during the A/T or Buyer’s reasonable demand to modify or supplement the Equipment, and Seller shall
perform such demand to the satisfaction of Buyer.

 

6. Seller shall bear all responsibilities and costs for the delivery, installation
and SET-UP of the Equipment, cooperating for the A/T, rectifying any defects, and the like that are required under this Article 4.

 

7. If any additional labor costs and the like will be incurred due to Buyer’s
demand to make any modification or newly add anything to this Agreement, the purchase order or the already mutually agreed specifications,
the amount of such additional costs and applicable payment terms shall be determined by the Parties through mutual consultation, and Seller
shall not be liable to pay any liquidated damages under this Article 4(10) for any delayed delivery caused by Buyer’s such demand
for modification or addition.

 

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8. If the Equipment causes any damages to Buyer due to reasons attributable
to Seller before the ownership of the Equipment has been transferred to Buyer, Seller shall compensate Buyer for such damages.

 

9. If Seller expects that the Equipment cannot be delivered in a timely
manner, Seller may request extension of the delivery date by writing at least 14 days prior to the original delivery date so that such
delay would not disturb Buyer’s production activities, and Buyer shall finally determine whether to extend the delivery date based
on mutual consultation with Seller.

 

10. If Seller fails to deliver the Equipment by the delivery date in compliance
with applicable Individual Contract, Seller shall pay Buyer an amount equal to 1.5/1,000 of the Equipment Price per each day of delay
as liquidated damages for delay, which may be deducted from the Equipment Price payable to Seller.

 

11. The aggregate liquidated damages for delay under this Article 4(10)
may not exceed 2% of the Equipment Price. This Article 4(11) is only applicable to the liquidated damages for delay, and may not be construed
as limiting Seller’s aggregate liability for breaching this Agreement or Individual Contract.

 

Article 4-2 (Handling of Rejected Equipment)

 

1. Based on the result of A/T, if Buyer deems that the Equipment does not
meet the quality it requires under its specifications and that the Equipment is not fit for use for mass production, Seller shall, in
accordance with Buyer’s direction and at Seller’s cost and responsibility, promptly supply Buyer with replacement equipment
that meets the quality required under Buyer’s specifications. In such case, Seller is not released from any liability resulting
from delayed delivery. Provided that, Seller shall not be held liable for the Equipment that is manufactured pursuant to the specifications
requested and determined by Buyer, but which does not meet the quality required under Buyer’s specifications.

 

2. In case of Article 4-2(1) above, Seller shall be liable to compensate
Buyer for any damages incurred based the ratio of defect; and in principle, the Parties shall resolve said issue through consultation
based on the principle of mutual trust.

 

 

 

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Article 5 (Interim Inspections)

 

1. Buyer may from time to time inspect Seller’s manufacturing process
and quality control regarding the Equipment at Seller’s premises during the manufacturing period, and Seller shall fully cooperate
with Buyer.

 

2. If Seller becomes aware of any unexpected issues during the manufacturing
of the Equipment, or it has a concern that any unexpected issue may occur, Seller shall notify Buyer thereof in writing in advance and
resolve said issue through consultation with Buyer.

 

Article 6 (Transfer of Ownership)

 

1. The ownership of the Equipment transfers from Seller to Buyer when the
Equipment passes the incoming inspection and is delivered to the place specified by Buyer.

 

2. Seller shall bear all risks of loss of or damage to the Equipment before
the ownership thereof transfers to Buyer pursuant to Article 6(1) above.

 

Article 7 (Payment of Equipment Price)

 

1. In consideration of Seller’s supply of the Equipment to Buyer,
Buyer shall pay Seller total of 2,100,000,000 Korean Won (VAT excluded) as the price for the Equipment (“Equipment Price”)
in accordance with this Article 7.

 

2. The Equipment Price under this Article 7(1) shall be paid in installments
by the upfront payment, interim payment and balance payment as follows:

 

- Upfront Payment: 30% of total supply price. KRW 630,000,000 (VAT excluded)

 

- Interim Payment: 60% of total supply price. KRW 1,260,000,000 (VAT excluded)

 

- Balance Payment: 10% of total supply price. KRW 210,000,000 (VAT excluded)

 

3. Upon Seller’s acceptance of the purchase order for the Equipment,
Buyer shall make the upfront payment to Seller within 1 week. After Buyer has finally confirmed at Seller’s premises that the Equipment
is free from defect prior to its delivery and upon Seller’s delivery of the Equipment to the place of delivery specified in the
purchase order, Buyer shall make the interim payment to Seller within 1 week.

 

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4. After Buyer’s issuance of the Confirmation of A/T Completion and
upon Seller’s issuance of invoice for the balance payment, Buyer shall make the balance payment to Seller within 1 month from the
invoice date.

 

Article 8 (Warranty)

 

1. Seller guarantees the quality, performance and safety of the Equipment
it supplied to Buyer for a period of 12 months from the date of its receipt of the balance payment (the “Warranty Period”).

 

2. If there is a failure or deterioration in performance of the Equipment
due to any defect in material, design, manufacturing, or transportation of the Equipment during the Warranty Period, Seller shall repair
or supply replacement equipment at its own costs pursuant to Buyer’s instruction and ensure that Buyer’s production activities
are not disturbed by such defect.

 

3. Even with respect to any issue with the Equipment that may arise after
the Warranty Period or due to any changes or modifications made to the Equipment by Buyer without Seller’s prior consent, Seller
shall provide Buyer with support necessary to promptly resolve such issue; provided that, any costs relating thereto shall be separately
agreed between the Parties.

 

Article 9 (Confidentiality)

 

1. Seller acknowledges that all information and materials it received from
Buyer, whether in writing, electronic or any other tangible or intangible forms, in connection with the supply of the Equipment, including
drawings, specifications, descriptions, evaluation information, process technology, etc. (the “Confidential Information”),
belong to Buyer and Seller shall have fiduciary duty to keep and maintain the Confidential Information strictly confidential. Upon termination
or cancellation of this Agreement or Individual Contract, or upon achievement of the purpose contemplated under this Agreement or Individual
Contract, or at any time upon Buyer’s request, Seller shall, pursuant to Buyer’s election and direction, immediately return
to Buyer, or completely destroy and delete, the Confidential Information and all materials and copies containing the Confidential Information
(regardless of means and forms utilized to store or save them), and Seller shall without delay provide Buyer with a written certificate,
affixed thereon Buyer’s duly authorized representative’s name and seal or signature, certifying its compliance with this Article
9(1).

 

2. Without Buyer’s prior written approval, Seller may not manufacture
the Equipment and sell, assign, provide as collateral or otherwise in any way transfer the Equipment to any third party. For the purpose
of this Article 9(2), any equipment that has the same or similar function as the Equipment shall be deemed as the Equipment for the purpose
of this Article 9(2) regardless of its physical form(color, quality of materials, etc.), condition or state(fully manufactured, partly
manufactured, materials, etc.), and name.

 

    	 	Page 5 of 8	 

     

    

3. Seller may not disclose the Confidential Information to any third party
except for its officers and employees who have the need to know in order to perform Seller’s obligations under this Agreement. If
Seller becomes aware of or suspects any unauthorized disclosure or use of the Confidential Information, it shall without delay notify
Buyer thereof in writing, and Seller shall, at its own cost and responsibility, take every measures necessary to prevent, cease or cure
such unauthorized disclosure or use.

 

4. Seller’s confidentiality obligation under this Article 9 shall
survive and remain in full force and effect for three (3) years even after termination or expiration of this Agreement.

 

Article 10 (Product Liability)

 

1. Seller shall make its best efforts to prevent any defect in the manufacturing,
improvement or modification, and supply of the Equipment.

 

2. If Buyer or any of its officers and employees, or any third party, suffers
any personal injury or property damage due to any apparent design defect in the Equipment, Seller shall compensate for such injury and
damage, and if any dispute arises with any third party in connection therewith, Seller shall be solely responsible for resolution thereof
and shall compensate Buyer for any damages incurred due to such dispute.

 

Article 11 (Training and Technical Support)

 

1. When supplying the Equipment, Seller shall also provide Buyer with the
Manual or technical data related to the operation of the Equipment, and provide training and technical support to Buyer’s employees
during the A/T;

 

2. The costs with respect to such training and support pursuant to Article
11(1) above shall be borne by Seller.

 

Article 12 (Environment and Safety Obligations)

 

1. Seller shall ensure that any installation, SET-UP, the A/T, repair of
defect, and other works carried out by Seller’s employees at Buyer’s premises (the “Field Work”) are in compliance
with applicable laws regarding environment and safety and Buyer’s internal rules.

 

    	 	Page 6 of 8	 

     

    

2. Seller shall take all measures related to safety, such as installation
of safety facility, purchase and maintenance of insurance, etc., in order to prevent any accident during the Field Work.

 

Article 13 (No Assignment)

 

Neither Party may assign or provide as collateral to any third party, or
otherwise in any way dispose, any of its rights and obligations under this Agreement without the other Party’s prior written consent.

 

Article 14 (Cancellation or Termination)

 

1. If any of the following occurs, any part or all of this Agreement or
Individual Contract may be immediately cancelled or terminated by written notice to the other Party:

 

		(1)	Seller fails to deliver the Equipment by the delivery date or the extended delivery date as determined
by Buyer, without any good cause such as a force majeure event that is beyond Seller’s control;

 

		(2)	Buyer fails to pay the Equipment Price in a timely manner without any good cause such as a force majeure
event that is beyond Buyer’s control;

 

		(3)	Either Party’s material asset becomes subject to any attachment, preliminary attachment, forced
auction, bankruptcy or winding up procedures, and such is not withdrawn or cancelled within 14 business days;

 

		(4)	Either Party’s check or note is not honored or bounces, or overdraft transaction is suspended by
a financial institution, and such is not cured within 14 business days; or

 

		(5)	Either Party breaches this Agreement or Individual Contract and the other Party notifies the breaching
Party to cure such breach within certain period of 7 or more days; but the breaching Party fails to give appropriate response or cure
such breach within the said period provided by the notifying Party.

 

2. Neither cancellation nor termination of this Agreement affects a Party’s
right to claim for damages.

 

Article 15 (Damages)

 

If either Party breaches this Agreement or Individual Contract and causes
any damages to the other Party, such breaching Party shall compensate the other Party for all damages incurred due to such breach.

 

 

 

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Article 16 (Dispute Resolution)

 

The Parties shall attempt in good faith to resolve by mutual consultation
any dispute arising out of or in connection with the interpretation of this Agreement or Individual Contract or any matter not specifically
provided for in this Agreement or Individual Contract; however, any dispute that cannot be resolved by the Parties shall be submitted
to the exclusive jurisdiction of the Suwon District Court.

 

Article 17 (Survival)

 

The provisions of Articles 8 through 10, and 13 through 16, of this Agreement
shall survive and remain in full force and effect even after the expiration, termination or cancellation of this Agreement or Individual
Contract.

 

 

 

Dated on February 10, 2022

 

 

	 	 	 
	[BUYER]	 	[SELLER]
	 	 	 
	338, Gwanggyojungang-ro, Suji-gu,	 	74-7, Mannyeon-ro 151beon-gil, Hyangnam-eup
	 	 	 
	Yongin-si, Gyeonggi-do, Republic of Korea	 	Hwaseong-si, Gyeonggi-do, Republic of Korea
	 	 	 
	10th Fl. A-1022 (Gwanggyo Woominewview)	 	 
	 	 	 
	Solar Window Asia Co., Ltd.	 	WI-A Corporation
	 	 	 
	John Rhee [SEAL]	 	Hyeong Yeol Yoon [SEAL]
	 	 	 
	Representative Director	 	Representative Director

 

 

 

 

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