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. 21, 2000
Filed:
Dec. 09, 1997
Applicant:
Inventors:
Subramanian S Venkatraman, Palo Alto, CA (US);
Thomas O Murdock, Vadnais Heights, MN (US);
Stephanus Pudjijanto, San Jose, CA (US);
Assignee:
Alza Corporation, Palo Alto, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A61M / ;
U.S. Cl.
CPC ...
424486 ; 514944 ; 424449 ;
Abstract
Pharmaceutical hydrogel formulations containing polyvinyl alcohol are provided. The formulations may serve as rug reservoirs in electrotransport drug delivery systems or passive transdermal systems, or they may be used in a variety of other types of dosage forms, e.g., capsules, suppositories, aerosols, and the like. With these formulations, there is virtually no syneresis encountered upon long term storage, an advantage that derives from selecting the quantity of polyvinyl alcohol in the gel to correspond to the polymer's degree of hydrolysis.