Expired Canadian patentCanada
Non-aqueous topical composition containing an ester of pyroglutamic acid
CA 1325596 C · Owner: Unilever Plc · Inventors: Scott, Ian Richard
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-aqueous drug-free composition for topical application to human skin comprises:, (i) a special ester of pyroglutamic acid; and (ii) a cosmetically acceptable non-aqueous vehicle.
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 28, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 10, 1989
GrantedDecember 28, 1993
Term endedDecember 28, 2010
Patent numberCA 1325596 C
Classification (IPC)A61K8/49 +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.