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:
Jul. 29, 2003
Filed:
Feb. 20, 2001
Applicant:
Inventors:
Tadahisa Sato, Kanagawa, JP;
Katsuyoshi Yamakawa, Kanagawa, JP;
Hiroshi Onishi, Kanagawa, JP;
Tadahiro Tsujimoto, Kanagawa, JP;
Assignee:
Fuji Photo Film Co., Ltd., Minami Ashigara, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B 1/00 ; C08B 1/02 ; C08B 3/06 ; C08B 3/30 ;
U.S. Cl.
CPC ...
C08B 1/00 ; C08B 1/02 ; C08B 3/06 ; C08B 3/30 ;
Abstract
A method of making cellulose polymer solution comprises dissolving a cellulose polymer raw material in a chlorine-free organic solvent system under a high temperature and a high pressure condition belonging to the nearcritical or the supercritical region of the system. By removing the solvent from the thus obtained cellulose polymer solution, cellulose polymer powders are also produced.