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:
Mar. 03, 1992
Filed:
Aug. 12, 1987
Applicant:
Inventor:
Stephen F Donovan, Fairfield, CT (US);
Assignee:
American Cyanamid Company, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D / ;
U.S. Cl.
CPC ...
252542 ; 252524 ; 252541 ; 562565 ; 548570 ; 548542 ;
Abstract
Complex N-hydroxyimide compounds and carboxy hydroxamic acid-functional derivatives thereof are prepared from organic amines reacted with maleate esters and maleic anhydride. The compounds exhibit strong metal ion chelating properties and are useful as detergent additives to improve stain removal.