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. 29, 1991
Filed:
Jun. 13, 1989
Applicant:
Inventors:
Burghard Gruning, Essen, DE;
Klaus Hoffmann, Essen, DE;
Gotz Koerner, Essen, DE;
Hans-Joachim Kollmeier, Essen, DE;
Assignee:
Th. Goldschmidt AG, Essen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B / ; C08B / ; A61K / ; A61K / ;
U.S. Cl.
CPC ...
536 98 ; 536 30 ; 536 32 ; 536 58 ; 536 63 ; 424 70 ; 424 71 ; 514781 ; 514880 ;
Abstract
Derivatives of carboxymethylcellulose are disclosed in which all or a portion of the carboxymethyl groups are replaced by groups of the general formula ##STR1## in which R.sup.1 is a hydrogen or methyl group,