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:
Dec. 15, 1981
Filed:
Dec. 15, 1980
Applicant:
Inventor:
Yoshiyuki Ikemoto, Himeji, JP;
Assignee:
Daicel Chemical Industries, Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08B / ; C08B / ; C08B / ;
U.S. Cl.
CPC ...
536 69 ; 536 71 ; 536 73 ; 536 76 ;
Abstract
Cellulose acetate is prepared acetylating cellulose at a high temperature of 50.degree.-85.degree. C. and then ripening the acetylated cellulose at a high temperature of 110.degree.-120.degree. C.