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. 08, 1988
Filed:
Jul. 25, 1986
Applicant:
Inventor:
Ping I Lee, Valley Cottage, NY (US);
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A01C / ;
U.S. Cl.
CPC ...
47 576 ; 106179 ; 106176 ;
Abstract
Membrane-forming polymeric systems comprising the molecular association product of a polymeric carboxylic acid having at least 10% of the monomer units containing free carboxylic groups with an ethoxylated nonionic surfactant; methods for the preparation of such polymeric systems; and a broad range of applications for such systems with particular emphasis on the release of diverse active agents at a continuous and controlled rate.