EXHIBIT 10.18

ASSIGNMENT

WHEREAS, we, Anthony R. Nelson, residing at 8769 Spring View Way,
Woodbury Minnesota 55125; Susan T. Oeltjan,residing at 2254 Vivian Lane, St. Paul, Minnesota 55119; William A. Hendrickson, residing at 1000 McKusick Road, Stillwater, Minnesota; and,
Kenneth R. Code, residing at 1780 Glastonbury Boulevard #4, Edmonton, Alberta, Canada T5T 6P9, made certain new and useful inventions and improvements for which we executed an application for Letters Patent of the United
States which is entitled ABSORBENT SYSTEMS PROVIDING ANTIMICROBIAL ACTIVITY, and hereby assigns US Provisional Patent Application Serial No.: 60/873,763, filed on December 8, 2006, and all applications claiming priority therefrom.

AND WHEREAS, BioLargo Life Technologies, Incorporated, a corporation organized and existing under and by virtue of the laws of the State
of California, and having an office and place of business at 2603 Main Street, Suite 1155, Irvine California 92614 (hereinafter Assignee) is desirous of acquiring the entire right, title and interest in and to
said inventions, improvements and application and in and to the Letters Patent to be obtained therefor;

NOW, THEREFORE, to all whom it may
concern, be it known that for good and valuable consideration, the receipt and sufficiency whereof is hereby acknowledged, we have sold, assigned, and transferred, and by these presents do sell, assign and transfer unto said Assignee, its successors
or assigns, the entire right, title and interest for all countries in and to all inventions and improvements disclosed in the aforesaid application, and in and to the said application, all divisions, continuations, continuations-in-part, or renewals
thereof, all Letters Patent which may be granted therefrom, and all reissues or extensions of such patents, and in and to any and all applications which have been or shall be filed in any foreign countries for Letters Patent on the said inventions
and improvements, including an assignment of all rights under the provisions of the International Convention, and all Letters Patent of foreign countries which may be granted therefrom; and I do hereby authorize and request the Commissioner of
Patents and Trademarks to issue any and all United States Letters Patent for the aforesaid inventions and improvements to the said Assignee as the assignee of the entire right, title and interest in and to the same, for the use of the said Assignee,
its successors and assigns.



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|                                                          |  |            
|--------------------------------------------------------- |  | -----------
|Docket No.: 496.024USP                                    |  | Page 2 of 2
|Serial No.: 60/873,763                                    |  |            
|Filing Date: December 8, 2006                             |  |            
|Title: Absorbent Systems Providing Antimicrobial Activity |  |            

AND, for the consideration aforesaid, we do hereby agree that we and our executors and legal
representatives will make, execute and deliver any and all other instruments in writing including any and all further application papers, affidavits, assignments and other documents, and will communicate to said Assignee, its successors and
representatives all facts known to me relating to said improvements and the history thereof and will testify in all legal proceedings and generally do all things which may be necessary or desirable more effectually to secure to and vest in said
Assignee, its successors or assigns the entire right, title and interest in and to the said improvements, inventions, applications, Letters Patent, rights, titles, benefits, privileges and advantages hereby sold, assigned and conveyed, or intended
so to be.

AND, furthermore we covenant and agree with said Assignee, its successors and assigns, that no assignment, grant, mortgage,
license or other agreement affecting the rights and property herein conveyed has been made to others by me and that full right to convey the same as herein expressed is possessed by me.

IN TESTIMONY WHEREOF, I have hereunto set my hand this 10 day of April, 2007



/s/ Anthony R. NelsonName:

Anthony R. Nelson




|              |  |   |  |    
|------------- |  | - |  | ---
|STATE OF MN   |  | ) |  |    
|              |  | ) |  | ss.
|COUNTY OF USA |  | ) |  |    

On this 10 day of April, 2007, before me personally appeared Anthony R. Nelson to me known and
known to me to be the person described in and who executed the foregoing instrument, and he/she duly acknowledged to me that he/she executed the same for the uses and purposes therein set forth



|       |  |               |  |                       
|------ |  | ------------- |  | ----------------------
|[SEAL] |  |               |  | /s/ Kelli Rae Mulvaney
|       |  | Notary Public



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|                                                          |  |            
|--------------------------------------------------------- |  | -----------
|Docket No.: 496.024USP                                    |  | Page 3 of 4
|Serial No.: 60/873,763                                    |  |            
|Filing Date: December 8, 2006                             |  |            
|Title: ABSORBENT SYSTEMS PROVIDING ANTIMICROBIAL ACTIVITY |  |            

IN TESTIMONY WHEREOF, I have hereunto set my hand this 10 day of April, 2007.



/s/ Susan T.OeltjenName:

Susan T. Oeltjen




|              |  |   |  |    
|------------- |  | - |  | ---
|STATE OF MN   |  | ) |  |    
|              |  | ) |  | ss.
|COUNTY OF USA |  | ) |  |    

On this 10 day of April, 2007, before me personally appeared Susan T. Oeltjen to me known and
known to me to be the person described in and who executed the foregoing instrument, and he/she duly acknowledged to me that he/she executed the same for the uses and purposes therein set forth



| |  |               |  |                       
| |  | ------------- |  | ----------------------
| |  |               |  | /s/ Kelli Rae Mulvaney
| |  | Notary Public



---

IN TESTIMONY WHEREOF, I have hereunto set my hand this 10 day of April, 2007.



/s/Christopher J. RuebName:

Christopher J. Rueb




|              |  |   |  |    
|------------- |  | - |  | ---
|STATE OF MN   |  | ) |  |    
|              |  | ) |  | ss.
|COUNTY OF USA |  | ) |  |    

On this 10 day of April, 2007, before me personally appeared Christopher J. Rueb to me known and
known to me to be the person described in and who executed the foregoing instrument, and he/she duly acknowledged to me that he/she executed the same for the uses and purposes therein set forth



| |  |               |  |                       
| |  | ------------- |  | ----------------------
| |  |               |  | /s/ Kelli Rae Mulvaney
| |  | Notary Public





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|                                                          |  |            
|--------------------------------------------------------- |  | -----------
|Docket No.: 496.024USP                                    |  | Page 4 of 4
|Serial No.: 60/873,763                                    |  |            
|Filing Date: December 8, 2006                             |  |            
|Title: ABSORBENT SYSTEMS PROVIDING ANTIMICROBIAL ACTIVITY |  |            

IN TESTIMONY WHEREOF, I have hereunto set my hand this 10th day of April, 2007.



/s/ William A. HendricksonName:

William A. Hendrickson




|              |  |   |  |    
|------------- |  | - |  | ---
|STATE OF MN   |  | ) |  |    
|              |  | ) |  | ss.
|COUNTY OF USA |  | ) |  |    

On this 10 day of April, 2007, before me personally appeared William A. Hendrickson to me known
and known to me to be the person described in and who executed the foregoing instrument, and he/she duly acknowledged to me that he/she executed the same for the uses and purposes therein set forth



| |  |               |  |                       
| |  | ------------- |  | ----------------------
| |  |               |  | /s/ Kelli Rae Mulvaney
| |  | Notary Public



---

IN TESTIMONY WHEREOF, I have hereunto set my hand this          day of
                    , 2007.



Name:

Kenneth R. Code




|           |  |   |  | 
|---------- |  | - |  | 
|CITY OF    |  | ) |  | 
|           |  |   |  | 
|COUNTRY OF |  | ) |  | 

Witnessed, on this          day of
                    , 2007 by



| |  |  |         | 
| |  |  | ------- | 
| |  |  |         | 
| |  |  | Witness



| |  |                     
| |  | --------------------
| |  |                     
| |  | Witness Name (Print)



| |  |                
| |  | ---------------
| |  |                
| |  | Witness Address



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|                                                          |  |            
|--------------------------------------------------------- |  | -----------
|Docket No.: 496.024USP                                    |  | Page 4 of 4
|Serial No.: 60/873,763                                    |  |            
|Filing Date: December 8, 2006                             |  |            
|Title: ABSORBENT SYSTEMS PROVIDING ANTIMICROBIAL ACTIVITY |  |            

IN TESTIMONY WHEREOF, I have hereunto set my hand this
         day of                     , 2007.



Name:

William A. Hendrickson




|          |  |   |  |    
|--------- |  | - |  | ---
|STATE OF  |  | ) |  |    
|          |  | ) |  | ss.
|COUNTY OF |  | ) |  |    

On this          day of
                    , 2007, before me personally appeared William A. Hendrickson to me known and known to me to be the person described in and who
executed the foregoing instrument, and he/she duly acknowledged to me that he/she executed the same for the uses and purposes therein set forth



| |  |               |  | 
| |  | ------------- |  | 
| |  | [SEAL]        |  | 
| |  | Notary Public



---

IN TESTIMONY WHEREOF, I have hereunto set my hand this 20 day of April, 2007.



/s/ Kenneth R. CodeName:

Kenneth R. Code




|                     |  |   |  | 
|-------------------- |  | - |  | 
|CITY OF EDMONTON, AB |  | ) |  | 
|                     |  |   |  | 
|COUNTRY OF CANADA    |  | ) |  | 

Witnessed, on this          day of
                    , 2007 by



| |  |  |         |                   
| |  |  | ------- | ------------------
| |  |  |         | /s/ Judith A. Code
| |  |  | Witness



| |  |                     
| |  | --------------------
| |  | Judith A. Code      
| |  | Witness Name (Print)



| |  |                                         
| |  | ----------------------------------------
| |  | #4, 1780 Glasten Bury Blvd. Edmonton, AB
| |  | Witness Address                         



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LOGO

UNITED STATES PATENT AND TRADEMARK
OFFICE

UNDER SECRETARY OF COMMERCE FOR
INTELLECTUAL PROPERTY AND

DIRECTOR OF THE
UNITED STATES PATENT AND TRADEMARK OFFICE

APRIL 25, 2007

PTAS

MARK A. LITMAN

MARK A. LITMAN & ASSOCIATES, P.A.

YORK BUSINESS CENTER

3209 WEST 76TH ST, SUITE 205

EDINA, MN 55435

UNITED STATES PATENT AND TRADEMARK OFFICE

NOTICE OF RECORDATION OF ASSIGNMENT DOCUMENT

THE ENCLOSED DOCUMENT HAS BEEN RECORDED BY THE ASSIGNMENT DIVISION OF THE U.S. PATENT AND TRADEMARK
OFFICE. A COMPLETE MICROFILM COPY IS AVAILABLE AT THE ASSIGNMENT SEARCH ROOM ON THE REEL AND FRAME NUMBER REFERENCED BELOW.

PLEASE REVIEW ALL INFORMATION
CONTAINED ON THIS NOTICE. THE INFORMATION CONTAINED ON THIS RECORDATION NOTICE REFLECTS THE DATA PRESENT IN THE PATENT AND TRADEMARK ASSIGNMENT SYSTEM. IF YOU SHOULD FIND ANY ERRORS OR HAVE QUESTIONS CONCERNING THIS NOTICE, YOU MAY CONTACT THE
EMPLOYEE WHOSE NAME APPEARS ON THIS NOTICE AT 571-272-3350. PLEASE SEND REQUEST FOR CORRECTION TO: U.S. PATENT AND TRADEMARK OFFICE, MAIL STOP: ASSIGNMENT SERVICES BRANCH, P.O. BOX 1450, ALEXANDRIA, VA 22313.



|                             |  |                        
|---------------------------- |  | -----------------------
|RECORDATION DATE: 04/24/2007 |  | REEL/FRAME: 019206/0678
|                             |  | NUMBER OF PAGES: 6     

BRIEF: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). DOCKET NUMBER: 4

ASSIGNOR:



|                   |  |                     
|------------------ |  | --------------------
|NELSON, ANTHONY R. |  | DOC DATE: 04/10/2007

ASSIGNOR:



|                  |  |                     
|----------------- |  | --------------------
|OELTJEN, SUSAN T. |  | DOC DATE: 04/10/2007

ASSIGNOR:



|                     |  |                     
|-------------------- |  | --------------------
|RUEB, CHRISTOPHER J. |  | DOC DATE: 04/10/2007

ASSIGNOR:



|                        |  |                     
|----------------------- |  | --------------------
|HENDRICKSON, WILLIAM A. |  | DOC DATE: 04/10/2007

ASSIGNOR:



|                 |  |                     
|---------------- |  | --------------------
|CODE, KENNETH R. |  | DOC DATE: 04/20/2007

ASSIGNEE:

BIOLARGO LIFE TECHNOLOGIES,

INCORPORATED

2603 MAIN STREET, SUITE 1155

IRVINE, CALIFORNIA 92614



|                                                          |  |                        
|--------------------------------------------------------- |  | -----------------------
|SERIAL NUMBER: 60873763                                   |  | FILING DATE: 12/08/2006
|PATENT NUMBER:                                            |  | ISSUE DATE:            
|TITLE: ABSORBENT SYSTEMS PROVIDING ANTIMICROBIAL ACTIVITY



P.O. Box 1450. Alexandria. Virginia 223131450 -
WWW.USPTO.GOV