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:
May. 21, 2002
Filed:
Nov. 10, 1999
Applicant:
Inventors:
Ties Karstens, Boetzingen, DE (US);
Armin Stein, Kenzingen, DE (US);
Hans Steinmeier, Teningen, DE (US);
Assignee:
Rhodia Acetow, Freiburg, DE (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B 1/100 ; C08B 1/102 ; C08B 1/600 ;
U.S. Cl.
CPC ...
C08B 1/100 ; C08B 1/102 ; C08B 1/600 ;
Abstract
The invention concerns reactive cellulose, i.e. cellulose having in particular a very low degree of crystallinity obtainable with a high degree of purity. Said novel reactive cellulose is particularly used as raw material for making cellulose ethers. The invention is characterized in that the reactive cellulose is substituted by organic groups according to a degree of substitution, DS, of less than 0.2, preferably between 0.04 and 0.2.