The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 1997
Filed:
Jan. 19, 1996
Kazuhiro Shimoda, Kanagawa, JP;
Masahiko Murayama, Kanagawa, JP;
Hidekazu Yamazaki, Kanagawa, JP;
Tohru Shibata, Hyogo, JP;
Shu Shimamoto, Hyogo, JP;
Hiroyuki Takemoto, Hyogo, JP;
Naoto Habu, Hyogo, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Daicel Chemical Industries, Ltd., Osaka, JP;
Abstract
A cellulose acetate solution has cellulose acetate in a solvent. The cellulose acetate has an average acetic acid content in the range of 58.0 to 62.5%. In the first embodiment of the invention, the solvent is a mixture of acetone and another organic solvent. The organic solvent is an ether having 3 to 12 carbon atoms, a ketone having 4 to 12 carbon atom, an ester having 3 to 12 carbon atoms, or an alcohol having 1 to 6 carbon atoms. In the second embodiment, the solvent is the ether, the ketone or the ester. Processes for the preparation of the solution and a cellulose acetate film are also disclosed.