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:
Oct. 04, 1994
Filed:
Oct. 10, 1991
Renee A Fallon, Sunnyvale, CA (US);
Donald R Wilson, San Francisco, CA (US);
Cygnus Therapeutic Systems, Redwood City, CA (US);
Abstract
A transdermal drug delivery device that administers drug in an initial pulse followed by a substantially lower continuous rate comprising a drug reservoir of the drug dissolved in a carrier and a volatile permeation enhancer confined between a backing that is permeable to the volatile permeation enhancer and an underlying substrate layer that is permeable to the drug, carrier and enhancer. When the device is placed on the skin the volatile permeation enhancer is depleted from the reservoir by evaporation through the backing such that the magnitude and duration of the pulse is dependent upon the permeability of the backing layer to the volatile enhancer.