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:
May. 11, 1999
Filed:
Sep. 13, 1996
Applicant:
Inventors:
Tung-Fen Chen, Sunnyvale, CA (US);
Chia-Ming Chiang, Foster City, CA (US);
Janan Jona, Sunnyvale, CA (US);
Priti Joshi, San Jose, CA (US);
Asha Ramdas, Mountain View, CA (US);
Assignee:
Cygnus, Inc., Redwood City, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61L / ;
U.S. Cl.
CPC ...
424449 ; 424448 ; 424486 ; 424D / ; 607307 ; 5147723 ;
Abstract
High capacity drug reservoirs are provided for incorporation into transdermal drug delivery systems. The drug reservoirs are hydrogels formulated from polyurethanes crosslinked with diisocyanate crosslinking agents or cured with radiation in the presence of a photoinitator. Drug loading as high as 65 to 70 wt. % or higher can be achieved by absorbing drug formulation into the reservoir after hydrogel synthesis. Methods for making and using transdermal systems containing such reservoirs are provided as well.