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:
Apr. 19, 1977
Filed:
Feb. 06, 1975
Applicant:
Inventor:
Izhak Blank, Haifa, IL;
Assignee:
Hydrophilics International, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A01N / ;
U.S. Cl.
CPC ...
71 97 ; 71 65 ; 71 79 ; 71DI / ;
Abstract
A composition comprising a copolymer of from 20 to 60 parts of at least one member selected from the class consisting of acrylic and methacrylic acids, from 20 to 70 parts of one member selected from the class of lower alkyl acrylates and lower alkyl methacrylates, and from 5 to 20 parts of a plasticizing monomer, in which at least some of the acid groups have been neutralized by multivalent cations, where a chemical, exclusive of water and plasticizer, releasable from a film of the referenced copolymer, is formed by casting and drying an aqueous solution of the copolymer containing the chemical.