Transdermal administration of buprenorphine
CA 2085126 A1 · Owner: Cygnus Therapeutic Systems · Inventors: Roos, Eric J.; Roy, Samir D.; Sharma, Kuldeepak
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and laminated composite (10) for administering buprenorphine transdermally to treat pain. The composite comprises an impermeable backing layer (11) and a reservoir layer (12) containing buprenorphine a release liner lamina (13) and optionally a permeation enhancer combined with a pressure-sensitive adhesive with the amounts of buprenorphine and optional enhancer being sufficient to cause the buprenorphine to pass through the skin at a rate in excess of about 0.05 mcg/cm2/hr.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 12, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.