Expired Canadian patentCanada
Topical device for administering tretinoin
CA 1092466 A · Owner: Johnson & Johnson · Inventors: Mezick, James A.; Marvel, John R.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tretinoin is incorporated in the adhesive mass of a dermatologically acceptable pressure-sensitive adhesive tape for the localized topical treatment of such skin conditions as acne and warts.
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 December 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 5, 1977
GrantedDecember 30, 1980
Term endedDecember 30, 1997
Patent numberCA 1092466 A
Classification (IPC)A61F13/02 +2 more
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.