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:
Dec. 28, 1993
Filed:
Aug. 23, 1991
Renee A Fallon, Sunnyvale, CA (US);
Subbu S Venkatraman, Palo Alto, CA (US);
Gary W Cleary, San Mateo, CA (US);
Cygnus Therapeutic Systems, Redwood City, CA (US);
Abstract
A delayed onset transdermal drug delivery device exhibiting a delay period of at least eight hours comprising a laminated composite of (12) a top backing layer; (13) a pressure rupturable layer underlying (12); (14) a reservoir of a solution of drug in al liquid vehicle between (12) and (13); (16) a wick layer underlying (13) for dispersing the drug once (13) is ruptured; (17) a first adhesive layer underlying (16) that is permeable to the drug; (18) a first polymer membrane that is permeable to drug but substantially impermeable to the adhesive of (17); (19) a microporous membrane underlying (18) which is itself impermeable to the drug and whose pores are unfilled; (20) a second polymer membrane that underlies the microporous membrane that is permeable to drug but substantially impermeable to the adhesive of (21) below; and (21) a second adhesive layer underlying (20) that is permeable to the drug.