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:
Jan. 06, 1998
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 process for the preparation of a cellulose acetate film comprises the steps of: cooling a mixture of cellulose acetate and an organic solvent to -100.degree. to -10.degree. C.; warming the cooled mixture to 0.degree. to 50.degree. C. to dissolve the cellulose acetate in the organic solvent; casting the obtained solution on a support; and evaporating the organic solvent to form the cellulose acetate film. The cellulose acetate has an average acetic acid content in the range of 58.0 to 62.5%. The organic solvent is acetone.