Document G6BbQLDRzek4qJek8L30gjeZv

ESTABLISHED 1802 E. I. d u Po n t d e Ne mo u r s & Co mp a n y INCORPORATED Wil min g t o n , De l a w a r e 19898 LEGAL DEPARTMENT September 27, 1988 Hon. Commissioner of Patents and Trademarks Washington, D.C. 20231 Sir: Case Number: CH-1361-A Inventors: Tze Chao Title: Method for Purifying Tic>2 Ore We transmit herewith for filing the above-identified patent application. Enclosed are the following papers: ( ) Patent specification with attached declaration. ( ) Patent specification without attached declaration. (X) Send all correspondence to: Registration No. 25,338 c/o Legal Department, Patent Division E. I. du Pont de Nemours & Company Wilmington, DE 19898 ( ) Formal Drawings ( ) Informal Drawings ( ) Information Disclosure Statement under 37 CFR 1.97 ( ) Preliminary Amendment ( ) Assignment of the invention ( ) Continuing Application including Request Form under 37 CFR 1.60 ( ) File Wrapper Continuing Application including Request Form under 37 CFR 1.62. Declaration attached ( ) yes; (X) no. N 30891 2 The filing fee has been calculated as shown below: Basic Fee $340.00 Total number of Claims in excess of 20 (3 X $12) 36.00 Number of independent Claims in excess of 3 (Ox $34) -- Multiple Dependent Claim(s) ($110) -- Assignment Recording Fee ($7) -- Total Fee $376.00 (X) Please charge the total fee due to the account of: E. I. du Pont de Nemours & Company 04 - 1925 ( ) Payment of the above fee in the amount of $ is covered in our Check No. . If this fee is insufficient or incorrect, please charge, or credit, the balance to the above-identified account. Respectfully submitted, E. I. DU PONT DE NEMOURS AND COMPANY Chief Clerk - Patent Division DUP050449121