Transdermal delivery device having a rate controlling adhesive
CA 1297754 C · Owner: Lee, Eun Soo · Inventors: Yum, Su Il; Enscore, David J.; Lee, Eun Soo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transdermal delivery device having a release-rate controllingadhesive is disclosed having improved delivery characteristics. The device employs a polyisobutylene/mineral oil adhesive formulation and an ethylene/vinyl acetate (EVA) drug reservoir formulation. The device is useful in delivering a wide variety of transdermally administrable drugs, particularly those which are moderately soluble in mineral oil. Preferred embodiments deliver timolol base and atropine base from an EVA (40% VA) reservoir formulation.
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
- Granted March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
- 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.