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:
Aug. 03, 1993
Filed:
Aug. 12, 1991
Applicant:
Inventors:
Charles E Jones, Yardley, PA (US);
Andrea C Keenan, Plymouth Meeting, PA (US);
George M Lein, Chalfont, PA (US);
Assignee:
Rohm and Haas Company, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C11D / ; C11D / ; C11D / ; B08B / ;
U.S. Cl.
CPC ...
25217424 ; 252135 ; 252156 ; 25217414 ; 25217425 ; 252D / ; 134 252 ;
Abstract
This invention relates to chlorine-free machine dishwashing detergent compositions that provide cleaning as effective as conventional chlorine containing machine dishwashing compositions. More specifically, this invention relates to dishwashing detergent compositions containing copolymers formed from maleic acid, maleic anhydride, or salts thereof, and a copolymerizable hydrophobic monomer, oligomer or polymer, containing from 4 to 20 carbon atoms. Another aspect of the invention is a chlorine-free machine dishwashing detergent containing low levels of, or no phosphate.