Document B8k3JDv0gydrDGv13QLq8KOqm

s Telephones (Si 533-50-60 (5) 207-13-64 (5) 207-01-56 (5) 511-99-67 (5) 511-99-68 LNTUOFF, GOMEI VEGA & UHTHOFF; S. C APARTADO POSTAL (P.O. BOX) M-2059 06000 MEXICO. D.F October 2, 1989 E.I. DU PONT D NEMOURS AND COMPANY Legal Department Patents Records Center 1007 Market Street Wilmington, Delaware 19898 U.S.A. RECEIVED OCT 02 1989 PATENT RECORDS CENTER HAMBURGO No. 260 06600 MEXICO. D.F PATENTS TRADEMARKS COPYRIGHTS & LICENSING Of Counsel: JAVIER UHTHOFF Legal: BERNARDO GOMEZ VEGA ALEJANDRO UHTHOFF ROBERT YOUNG MANUEL M. SOTO MARIO PONCE HORACIO RANGEL HERIBERTO PEDRAZA JAVIER UHTHOFF ORIVE HECTOR VELASCO GABRIELA ALVAREZ CONSUELO GONZALEZ JOSE M. HINOJOSA MONICA GUTIERREZ GALINDO CRISTINA SOTO ADOLFO OCEJO ULIANA HERNANDEZ REBECA GALVAN Technical: JOSE LEON DEL RIO p'TMTMo PORFIRIO GARCIA GEORGINA SAMANO MARISELA ARCHUNDIA GUILLERMO A. GONZALEZ mmmi mk MARIO MONTAfiEZ ALFREDO SANCHEZ B. RAUL RODRIGUEZ GUILLERMO MARTINEZ RE: E.I. Mex. Pat. Our Case: Attention: Mr. David J. Gould. Dear Mr. Gould: Referring to the above case, the original Letters Patent document, are as follows: Patent Number: Duration: DU PONT OE NEMOURS AND COMPANY.appln. No. 192468 - Ref: CH-1175 363-P we take pleasure in sending you whose most significant "data 159071 14 years {unextendible) from the date of issuance of the Letters Patent. Legal (Filing) date: April 28, 1982 Date of Issuance: April 14, 1989 Annuity taxes already paid: 1st to 3rd Next tax payable: 4th on January 1992 FILE CHECKED Late Payment Grace Period: Six months following annuity's OCT 1 1 1S89 due date? i-e- July 1992 iX/.C!C Q TELEX: 17-74-554 UTOFME 17-73-380 UTOFME FACSIMILE: DIAL (525) 514-75-96 CABLES: UHTHOFF O' DUP050302026 Working Requirements: 2- - According to the Mexican Law on Inventions and Marks, proof of industrial working in Mexico must be filed within the two months following the starting date of said working or exploitation here. Lack of filing of the working Declaration within a three year term counted as from the date of issuance of the patent entitles any person to apply before Mexican Patent Office for the grant of a compulsory license under the conditions established in Article 50 of the above mentioned Law. Expiration or lapse by lack of working: Pursuant to Article 48 of the said Mexican Law (as amended in 1986), the patent shall lapse or will be expired "within (sic) a two year period counted as from the date on which the first compulsory license is granted". Marking requirements indispensable to warn infringers: "Patente No. 159071" We are enclosing our Debit Note to cover the expenditures regarding payment of final fees in this case. Very truly yours, UHTHQFF, GQMEZ^VEGA & UHTHOFF, S.C. Javier J.hthoff-Ori \r Enclosures: JUO/rchc* DU P050302027