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BROOKES & CRT IN t e l e x 267541 TELEPHONES 101) 242 9631 FACSIMILE (Ol) 831 0586 CHARTERED PATENT AGENTS LDX 318 TRADE MARK AGENTS EUROPEAN PATENT ATTORNEVS RICHARD C. MARTIN, m.a .c a n t a b. HIGH HOLBORN HOUSE DAVID C. WOODCRAFT, b .s %.{c h k m.) ERIC E. BARNARD, C.IEno.,M.l.-B,COtp. A.F. 52/5-4, HIGH HOLBORN JOHN F. SYMONQS, LL.B.LCNO-, SOLICITOR JOHN H. BLAKE, B.b ,(Ch e m| HUGH R. WRIGHT, M.A.OROM. PETER C. SANDERS. B.8c. RCEIV,EDLONDON, WC1V 6SE DONALD J. ATTFIELD, S.Sc.C.CHCM. M.R.9.C.(BIRMINGHAM) a s s is t e d at: TIMOTHY M. A. RICKARD, B.s .p m.Q. APRi ? mo p DCW/VSW GRAHAM F. MATTHEWS, BA. C.En o . F. i.e.E. (c o n s u l t a n t ) H. NICHOLAS MATTHEWS, W.in s t .T.M.A.{CON9ULTAMT} p a t e n t. niMUTt.. 1 1 CiV / VOUfl REF GEOFFREY . BROOME (COU3ULTANT) RCEIV ED Ornee Ma n a g e r - A. J. JELLY Ac c o u n t s --Mr b C.OLSINIA APR 18 1990 Mr. David J. Gould Djm E.I. DU PONT DE NEMOURS AND COMPANY Legal Department, Patent Records Center 1007 Market Street Wilmington, Delaware 19898 U.S.A. 6 April 1990 Dear David, / European Patent Application No. 87 303 681.8 Your reference : CH-1371 Thank you for your letter dated March 29 1990. I have now prepared and filed a further amendment and response, a copy of which is enclosed. Hopefully, this will now proceed to allowance. I shall, of course, continue to keep you informed of progress in this matter and in the meantime enclose our account. Yours sincerely. DAVID C. WOODCRAFT Enel: TUNBRIDGE w e l l s : I BOTNE PARK, TUNBRIDGE WELLS. KEMT. TIM BEL. TEL. (0892) SIOSOO TELEX 9S707B FACSIMILE (0892) 810886 BIRMINGHAM: PRUDENTIAL BUILDINGS, 5 ST. PHILIP'S PLACE. BIRMINGHAM, S3 2AF. TEL. t02) 236 6263 TELEX 33S38I FACSIMILE {021} 8001473 MUNICH: 15 ZWEIBRUCKENSTRASSE, 6000 MUNICH 22. TEL. {068) 22 20 IO N 30958 c BROOKES 5c MARTIN CHARTERED PATENT AGENTS TRADE MARK AGENTS EUROPEAN PATENT ATTORNEYS DJ 6'- RlCHARO C. MARTIN, m.a .On t a b. OAVIO C.WOOOCftAFT, e.Sc.,[Cwc*J ERIC E. BARNARD, C.Ch o .,M.i.E.C.,G.OiA A.i GRAHAM F. MATTHEWS, B.A., C.CmO. r. >.C.| JOHN F. SYMONOS, UU.B.WNO.,SOUCitoi JOHN H. SLAKE, b .Sc ..(c h c k ) HUGH R. WRIGHT, m.a .Ok o m. PETER C. SANDERS, B. So. H. NICHOLAS MATTHEWS. H.IN9T. T.m.A. DONALD J. ATTFIEL.D, s.Se. c .Cmc m.m.R. 1'. I. DU FQMT DE UEMOURS AriQ COMPAMY Legal patent Heccrds Center 1007 Market -itreet wilr.iingtonf Delaware 19393 U.5.A. c: TEUBi 267541 TELEPHONES (Otf 242 9631 FAcaiHtue (Ol) 63! 0586 l o x 316 HIGH HOLBORN HOUSE 52/54, HIGH HOLBORN LONDON>WCIV 6SE VAT REG.N0 232 2734 84 DATE & TAX POINT 1 DCW/VSW INVOICE No- / Uil 1 U . o APRIL 1990 VAT At % VAT Tots! European Patent Application do. 87303581.t Your reference Cii 1371 / ..o; reporting further official letter with our letter dated February 15 1990, studying your letter dated March 20 1990, and responding on March 22, 1990, writing to you further on April 4 1990, noting your instructions and preparing and filing response and amendment in che EPO US$ 524 sTsscsua^ssstsasaas: Terms of Business Payment Is due within 30 days from the dote of this account <0flr APPR1O0VAL C0OPPNY KEEP IN CASE FILE FOLDER N 30958.01 DUP050449544