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:
Oct. 27, 1992
Filed:
Dec. 13, 1990
Applicant:
Inventors:
Ezat Khoshdel, Neston, GB;
Cornelis G van Kralingen, Chester, GB;
Assignee:
Lever Brothers Company, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
5263182 ; 5263183 ;
Abstract
Certain polymeric polycarboxylic acids and salts containing hydroxyl or hydroxymethyl groups in close proximity to carboxyl groups, especially poly(2-hydroxymethylacrylic) acid and its salts, are effective sequestrants of divalent and polyvalent metal ions and are useful as builders in detergent compositions.