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. 29, 2001
Filed:
Apr. 21, 1999
Applicant:
Inventors:
Jerry D. Gargulak, Weston, WI (US);
Lori L. Bushar, Mosinee, WI (US);
Ashoke K. Sengupta, Mosinee, WI (US);
Assignee:
LignoTech USA, Inc., Rothschild, WI (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B 2/400 ; C04B 2/418 ;
U.S. Cl.
CPC ...
C04B 2/400 ; C04B 2/418 ;
Abstract
A modification to lignosulfonate is disclosed, the effect of which is to reduce the set retarding and air entraining properties normally experienced when using lignosulfonates as water reducing admixtures in cement compositions. The modified lignosulfonate is obtained by oxidative reaction of a lignosulfonate or one of its salts with ammonia or other amine in an aqueous solution.