EXHIBIT 10.31 UNITED STATES DEPARTMENT OF COMMERCE [LOGO] PATENT AND TRADEMARK OFFICE Address: Box ISSUE FEE ASSISTANT COMMISSIONER FOR PATENTS WASHINGTON, D.C. 20231 NOTICE OF ALLOWANCE AND ISSUE FEE DUE 34M2/0428 ROBERT M DOWNEY 701 BRICKELL AVENUE SUITE 1480 MIAMI FL 33131 - ------------------------------------------------------------------------------------------------------------------ APPLICATION NO FILING DATE TOTAL CLAIMS EXAMINER AND GROUP ART UNIT DATE MAILED - ------------------------------------------------------------------------------------------------------------------ 08/532,469 09/22/95 015 STINSON, F 3405 04/28/9 - ------------------------------------------------------------------------------------------------------------------ FIRST NAMED MANSUR, PIERRE G. APPLICANT - ------------------------------------------------------------------------------------------------------------------ TITLE OF GENERAL WASHER APPARATUS INVENTION - ------------------------------------------------------------------------------------------------------------------ ATTY'S DOCKET NO. CLASS-SUBCLASS BATCH NO. APPLN. TYPE SMALL ENTITY FEE DUE DATE DUE - ------------------------------------------------------------------------------------------------------------------ 3 MANSPA495 134-108.000 M36 UTILITY YES $645.00 07/28/97 - ------------------------------------------------------------------------------------------------------------------ THE APPLICATION IDENTIFIED ABOVE HAS BEEN EXAMINED AND IS ALLOWED FOR ISSUANCE AS A PATENT. PROSECUTION ON THE MERITS IS CLOSED. THE ISSUE FEE MUST BE PAID WITHIN THREE MONTHS FROM THE MAILING DATE OF THIS NOTICE OR THIS APPLICATION SHALL BE REGARDED AS ABANDONED. THIS STATUTORY PERIOD CANNOT BE EXTENDED. HOW TO RESPOND TO THIS NOTICE: I. Review the SMALL ENTITY status shown above. If the SMALL ENTITY is shown as NO: If the SMALL ENTITY is shown as yes, verify your current SMALL ENTITY status: A. If the status is changed, pay twice the amount of the A. Pay FEE DUE shown above, or FEE DUE shown and notify the Patent and Trademark Office of the change in status, or B. If the status is the same, pay the FEE DUE shown B. File verified statement of Small Entity Status before, or above. with payment of 1/2 the FEE DUE shown above. II. Part B of this notice should be completed and returned to the Patent and Trademark Office (PTO) with your ISSUE FEE. Even if the ISSUE FEE has already been paid by charge to deposit account, Part B should be completed and returned. If you are charging the ISSUE FEE to your deposit account, section "6b" of Part B should be completed. III. All communications regarding this application must give application number and batch number. Please direct all communication prior to issuance to Box ISSUE FEE unless advised to the contrary. IMPORTANT REMINDER: PATENTS ISSUING ON APPLICATIONS FILED ON OR AFTER DEC. 12, 1980 MAY REQUIRE PAYMENT OF MAINTENANCE FEES. IT IS PATENTEE'S RESPONSIBILITY TO ENSURE TIMELY PAYMENT OF MAINTENANCE FEES WHEN DUE.