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. 17, 2001
Filed:
Jan. 13, 2000
Applicant:
Inventors:
Paola Puppo, Cogoleto, IT;
Alberto Valsecchi, Vado Ligure, IT;
Carlo Barlocco, Millesimo, IT;
Luisa Tavella, Bergeggi, IT;
Assignee:
Ferrania S.p.A., , IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C 1/835 ; G03C 1/04 ;
U.S. Cl.
CPC ...
G03C 1/835 ; G03C 1/04 ;
Abstract
One object of the present invention is to provide a mixture composed of 1) a cellulose ether derivative esterified at least with a biprotic acid group derivative expressed by the formula HOOC—B—COOH (I), wherein B is a linear aliphatic group represented by (CH,),with x a positive integer from 1 to 5 or is a 5-member or 6-member cycloaliphatic group and 2) a cellulose or cellulose derivative esterified at least with a phthalic acid derivative represented by the following formula (II).