EXHIBIT 10.30

                                PROMISSORY NOTE

<TABLE>
<CAPTION>
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     Principal        Loan Date         Maturity           Loan No          Call/Coll            Account         Officer    Initials
<S>                   <C>              <C>                <C>                  <C>                <C>              <C>        <C>
    $500,000.00       04-26-2004       05-03-2005         108143856            2000                                016
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 References in the shaded area are for Lender's use only and do not limit the applicability of this document to any particular loan
                     or item. Any item above containing "***" has been omitted due to text length limitations.
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Borrower. Human Pheromone Sciences, Inc.                   Lender:  Mid-Peninsula Bank - part of Greater Bay Bank NA.
          84 West Santa Clara Street. Suite 720                     Palo Alto Office
          San Jose, CA 95113                                        420 Cowper Street
                                                                    Palo Alto, CA 94301
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Principal Amount: $500,000.00                           Initial Rate: 4.750%                            Date of Note: April 26, 2004
</TABLE>

PROMISE TO PAY. Human Pheromone Sciences,  Inc.  ("Borrower") promises to pay to
Mid-Peninsula  Bank - part of Greater  Bay Bank N.A.  ("Lender"),  or order,  in
lawful  money of the United  States of  America,  the  principal  amount of Five
Hundred  Thousand  &  00/100  Dollars   ($500,000.00)  or  so  much  as  may  be
outstanding,  together with interest on the unpaid outstanding principal balance
of each  advance.  Interest  shall be  calculated  from the date of each advance
until repayment of each advance.

PAYMENT. Borrower will pay this loan in one payment of all outstanding principal
plus all accrued unpaid interest on May 3, 2005. In addition,  Borrower will pay
regular  monthly  payments of all accrued unpaid interest due as of each payment
date, beginning June 3, 2004, with all subsequent interest payments to be due on
the same day of each month after that.  Unless  otherwise  agreed or required by
applicable law,  payments will be applied first to any accrued unpaid  interest;
then to principal;  then to any unpaid  collection  costs;  and then to any late
charges.  The annual interest rate for this Note is computed on a 365/360 basis;
that is, by applying  the ratio of the annual  interest  rate over a year of 360
days, multiplied by the outstanding principal balance,  multiplied by the actual
number of days the principal balance is outstanding. Borrower will pay Lender at
Lender's  address  shown above or at such other place as Lender may designate in
writing.

VARIABLE INTEREST RATE. The interest rate on this Note is subject to change from
time to time based on changes in an independent index which is the Prime Rate as
published in the Wall Street Journal (Western Edition) (the "Index").  The Index
is not  necessarily the lowest rate charged by Lender on its loans, If the Index
becomes  unavailable  during  the term of this  loan,  Lender  may  designate  a
substitute index after notice to Borrower. Lender will tell Borrower the current
Index rate upon Borrower's request. The interest rate change will not occur more
often than each day.  Borrower  understands  that Lender may make loans based on
other rates as well.  The Index  currently is 4.000%.  The  interest  rate to be
applied to the unpaid principal balance of this Note will be at a rate of  0.750
percentage  points  over the  Index,  resulting  in an  initial  rate of 4.750%.
NOTICE:  Under no circumstances will the interest rate on this Note be more than
the maximum rate allowed by applicable law.

PREPAYMENT;  MINIMUM  INTEREST  CHARGE.  Borrower  agrees that all loan fees and
other  prepaid  finance  charges are earned fully as of the date of the loan and
will not be  subject to refund  upon early  payment  whether  voluntary  or as a
result of default), except as otherwise required by law. In any event, even upon
full prepayment of this Note, Borrower  understands that Lender is entitled to a
minimum interest charge of $250.00.  Other than Borrower's obligation to pay any
minimum  interest  charge,  Borrower may pay without penalty all or a portion of
the amount owed earlier than it is due. Early  payments will not,  unless agreed
to by Lender in writing,  relieve Borrower of Borrower's  obligation to continue
to make payments of accrued unpaid interest.  Rather, early payments will reduce
the principal  balance due.  Borrower  agrees not to send Lender payments marked
"paid in full", "without recourse",  or similar language. If Borrower sends such
a payment, Lender may accept it without losing any of Lender's rights under this
Note,  and  Borrower  will remain  obligated  to pay any further  amount owed to
Lender. All written  communications  concerning disputed amounts,  including any
check or other payment  instrument  that indicates that the payment  constitutes
"payment in full" of the amount owed or that is tendered  with other  conditions
or limitations or as full  satisfaction  of a disputed  amount must be mailed or
delivered  to:  Mid-Peninsula  Bank - part of Greater  Bay Bank N.A.,  Palo Alto
Office, 420 Cowper Street, Palo Alto, CA 94301.

LATE  CHARGE.  If a payment  is 10 days or more late,  Borrower  will be charged
5.000% of the unpaid portion of the regularly scheduled payment.

INTEREST AFTER DEFAULT,  Upon default,  the variable  interest rate on this Note
shall  immediately  increase  to 5.750  percentage  points  over the  Index,  if
permitted under applicable law.

DEFAULT.  Each of the following shall  constitute an event of default ("Event of
Default") under this Note:

     Payment  Default.  Borrower  fails to make any payment  when due under this
     Note.

     Other Defaults. Borrower fails to comply with or to perform any other term,
     obligation,  covenant or condition  contained in this Note or in any of the
     related  documents  or to comply with or to perform  any term,  obligation,
     covenant or condition  contained in any other agreement  between Lender and
     Borrower.

     Default in Favor of Third Parties.  Borrower or any Grantor  defaults under
     any loan,  extension  of  credit,  security  agreement,  purchase  or sales
     agreement, or any other agreement, in favor of any other creditor or person
     that may materially affect any of Borrower's property or Borrower's ability
     to repay this Note or perform Borrower's obligations under this Note or any
     of the related documents.

     False  Statements.  Any  warranty,  representation  or  statement  made  or
     furnished to Lender by Borrower or on Borrower's  behalf under this Note or
     the related  documents  is false or  misleading  in any  material  respect,
     either now or at the time made or furnished or becomes  false or misleading
     at any time thereafter.

     Insolvency.  The  dissolution or  termination of Borrower's  existence as a
     going business,  the insolvency of Borrower,  the appointment of a receiver
     for any part of  Borrower's  property,  any  assignment  for the benefit of
     creditors,  any  type  of  creditor  workout,  or the  commencement  of any
     proceeding under any bankruptcy or insolvency laws by or against Borrower.

     Creditor  or  Forfeiture   Proceedings.   Commencement  of  foreclosure  or
     forfeiture   proceedings,   whether  by  judicial  proceeding,   self-help,
     repossession  or any other  method,  by any  creditor of Borrower or by any
     governmental agency against any collateral securing the loan. This includes
     a garnishment of any of Borrower's  accounts,  including  deposit accounts,
     with Lender.  However,  this Event of Default shall not apply if there is a
     good faith dispute by Borrower as to the validity or  reasonableness of the
     claim which is the basis of the creditor or  forfeiture  proceeding  and if
     Borrower  gives  Lender  written  notice  of  the  creditor  or  forfeiture
     proceeding  and  deposits  with  Lender  monies  or a  surety  bond for the
     creditor or forfeiture  proceeding,  in an amount  determined by Lender, in
     its sole discretion, as being an adequate reserve or bond for the dispute.

     Events Affecting Guarantor. Any of the preceding events occurs with respect
     to any guarantor,  endorser,  surety, or accommodation  party of any of the
     indebtedness or any guarantor,  endorser,  surety,  or accommodation  party
     dies or becomes  incompetent,  or revokes or disputes  the  validity of, or
     liability under,  any guaranty of the indebtedness  evidenced by this Note.
     In the  event of a death,  Lender,  at its  option,  may,  but shall not be
     required to, permit the guarantor's  estate to assume  unconditionally  the
     obligations  arising under the guaranty in a manner satisfactory to Lender,
     and, in doing so, cure any Event of Default.


<PAGE>

                                 PROMISSORY NOTE
Loan No: 108143856                 (Continued)                            Page 2
================================================================================

     Change In Ownership.  Any change in ownership of twenty-five  percent (25%)
     or more of the common stock of Borrower.

     Adverse Change.  A material  adverse change occurs in Borrower's  financial
     condition,  or Lender  believes the prospect of payment or  performance  of
     this Note is impaired.

     Cure Provisions. If any default, other than a default in payment is curable
     and if  Borrower  has not  been  given a  notice  of a  breach  of the same
     provision of this Note within the preceding  twelve (12) months,  it may be
     cured land no event of  default  will have  occurred)  if  Borrower,  after
     receiving  written notice from Lender  demanding cure of such default:  (1)
     cures the default  within  fifteen (15) days;  or (2) if the cure  requires
     more than fifteen (15) days, immediately initiates steps which Lender deems
     in  Lender's  sole  discretion  to be  sufficient  to cure the  default and
     thereafter  continues  and  completes all  reasonable  and necessary  steps
     sufficient to produce compliance as soon as reasonably practical.

LENDER'S  RIGHTS.  Upon default,  Lender may declare the entire unpaid principal
balance on this Note and all accrued unpaid interest  immediately  due, and then
Borrower will pay that amount.

(PLEASE INITIAL)                        * reasonable

ATTORNEYS' FEES:  EXPENSES.  Lender may hire or pay someone else to help collect
this Note if Borrower does not pay.  Borrower will pay Lender that amount.  This
includes,  subject to any limits under applicable law, Lender's attorneys' fees*
and  Lender's  legal  expenses,*  whether or not there is a  lawsuit,  including
attorneys'  fees,  expenses for  bankruptcy  proceedings  (including  efforts to
modify or vacate any automatic stay or injunction),  and appeals.  Borrower also
will pay any court costs, in addition to all other sums provided by law.

JURY WAIVER. Lender and Borrower hereby waive the right to any jury trial in any
action, proceeding, or counterclaim brought by either Lender or Borrower against
the other. (Initial Here _______)

GOVERNING  LAW.  This  Note will be  governed  by,  construed  and  enforced  in
accordance  with federal law and the laws of the State of California.  This Note
has been accepted by Lender in the State of California.

CHOICE OF VENUE. If there is a lawsuit, Borrower agrees upon Lender's request to
submit  to the  jurisdiction  of the  courts  of Santa  Clara  County,  State of
California.

COLLATERAL.  Borrower  acknowledges  this Note is secured by the  Collateral  as
described in that certain Commercial Security Agreement dated April 19, 2002.

LINE OF CREDIT.  This Note evidences a revolving line of credit.  Advances under
this  Note may be  requested  either  orally or in  writing  by  Borrower  or as
provided in this  paragraph.  Lender may,  but need not,  require  that all oral
requests  be  confirmed  in  writing.  All  communications,   instructions,   or
directions  by  telephone  or otherwise to Lender are to be directed to Lender's
office shown above.  The following  persons  currently are authorized to request
advances and authorize  payments under the line of credit until Lender  receives
from Borrower,  at Lender's address shown above, written notice of revocation of
their  authority:  William Horgan,  Chairman & CEO of Human Pheromone  Sciences.
Inc.; and Robert Brooks, VP of Operations.  Borrower agrees to be liable for all
sums either:  (A) advanced in accordance with the  instructions of an authorized
person or (B) credited to any of  Borrower's  accounts  with Lender.  The unpaid
principal  balance  owing  on  this  Note  at  any  time  may  be  evidenced  by
endorsements  on this Note or by  Lender's  internal  records,  including  daily
computer print-outs.  Lender will have no obligation to advance funds under this
Note if: (A)  Borrower or any  guarantor  is in default  under the terms of this
Note or any agreement that Borrower or any guarantor has with Lender,  including
any agreement made in connection  with the signing of this Note; (B) Borrower or
any guarantor  ceases doing business or is insolvent;  (C) any guarantor  seeks,
claims or  otherwise  attempts  to limit,  modify  or  revoke  such  guarantor's
guarantee  of this  Note or any other  loan with  Lender;  or (D)  Borrower  has
applied  funds  provided  pursuant  to this Note for  purposes  other than those
authorized by Lender.

BUSINESS LOAN  AGREEMENT.  In addition to the terms and conditions  contained in
the Note,  it is also  subject  to the terms and  conditions  contained  in that
certain  Business Loan Agreement  ("Agreement")  dated May 2, 2003,  executed by
Borrower in favor of Lender.

PRIOR NOTE.  Promissory Note dated May 2, 2003 in the original  principal amount
of $500,000.00, (the "Note").

SUCCESSOR INTERESTS.  The terms of this Note shall be binding upon Borrower, and
upon Borrower's heirs,  personal  representatives,  successors and assigns,  and
shall inure to the benefit of Lender and its successors and assigns.

GENERAL  PROVISIONS.  Lender may delay or forgo  enforcing  any of its rights or
remedies under this Note without losing them.  Borrower and any other person who
signs, guarantees or endorses this Note, to the extent allowed by law, waive any
applicable statute of limitations,  presentment,  demand for payment, and notice
of  dishonor.  Upon any change in the terms of this Note,  and unless  otherwise
expressly  stated in  writing,  no party who signs this Note,  whether as maker,
guarantor,  accommodation  maker or endorser,  shall be released from liability.
All such parties agree that Lender may renew or extend  (repeatedly  and for any
length of time) this loan or release any party or  guarantor or  collateral;  or
impair,  fail to  realize  upon or perfect  Lender's  security  interest  in the
collateral;  and take any other action  deemed  necessary by Lender  without the
consent  of or notice to anyone.  All such  parties  also agree that  Lender may
modify this loan without the consent of or notice to anyone other than the party
with whom the  modification is made. The  obligations  under this Note are joint
and several.

PRIOR TO SIGNING THIS NOTE,  BORROWER READ AND  UNDERSTOOD ALL THE PROVISIONS OF
THIS NOTE,  INCLUDING THE VARIABLE INTEREST RATE PROVISIONS.  BORROWER AGREES TO
THE TERMS OF THE NOTE.

BORROWER ACKNOWLEDGES RECEIPT OF A COMPLETED COPY OF THIS PROMISSORY NOTE.

BORROWER:



HUMAN PHEROMONE SCIENCES INC.


By:  /s/ WILLIAM P. HORGAN
    -----------------------------------------
    William Horgan, Chairman & CEO of Human
    Pheromone Sciences, Inc.