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:
Jan. 30, 1996
Filed:
Aug. 13, 1993
Applicant:
Inventors:
Gregory S Dapper, Newark, CA (US);
Ronald K Yamamoto, San Francisco, CA (US);
Assignee:
Vitaphore Corporation, Plainsboro, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ;
U.S. Cl.
CPC ...
4242781 ; 424484 ; 424499 ; 4241841 ; 514774 ; 514776 ; 514773 ; 530356 ; 530354 ; 530409 ;
Abstract
A method for forming a controlled release polymeric substrate is provided by contacting a polymeric substrate with a liquid mixture containing a cross-linking agent at least partially soluble therein comprising water and an organic liquid, for a period of time and at a temperature and concentration of the agent sufficient for the agent to penetrate the substrate to form cross-linking bridges in the substrate in a decreasing concentration gradient beneath the surface.