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:
Sep. 29, 1998
Filed:
Mar. 19, 1996
Applicant:
Inventors:
Francis R Cala, Highland Park, NJ (US);
Richard A Reynolds, Plainsboro, NJ (US);
Assignee:
Church & Dwight Co., Inc., Princeton, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C11D / ; C11D / ; C11D / ; C11D / ;
U.S. Cl.
CPC ...
510175 ; 510254 ; 510255 ; 510245 ; 510420 ; 510421 ; 510252 ;
Abstract
Aqueous alkali cleaning compositions containing an alkali metal salt, an N-alkyl pyrrolidone derivative, and specific ethylene oxide/propylene oxide block copolymers having molecular weights of from about 1500 to about 2500. Such compositions can be employed as an aqueous concentrate or solution to clean a substrate such as a circuit board, wiring board or metal surface. Specific ethylene oxide/propylene oxide block copolymers protect plastic parts from corrosion by N-alkyl pyrrolidone derivatives without compromising N-alkyl pyrrolidone derivative cleaning ability.