Expired Canadian patentCanada
Tanning composition
CA 1233750 A · Owner: Yale University · Inventors: Pawelek, John M.; Agin, Patricia P.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A composition useful for topical application to the epidermis of a mammal to increase epidermal melanization comprising:, A. and, B. a vehicle suitable for topical application.
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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 8, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 8, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 29, 1984
GrantedMarch 8, 1988
Term endedMarch 8, 2005
Patent numberCA 1233750 A
Classification (IPC)C07F9/12 +1 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.