Expired Canadian patentCanada
Terpolymers, their use in hair treatment agents and hair treatment agents containing these terpolymers
CA 1306417 C · Owner: Nuber, Adolf · Inventors: Straub, Ferdinand; Sanner, Axel; Vogel, Friedrich
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 terpolymer of vinylpyrrolidone, tert-butyl (meth)acrylate and acrylic or methacrylic acid, its use in hair treatment agents and hair, cosmetics compositions which contain these agents.
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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 August 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 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.
FiledAugust 4, 1987
GrantedAugust 18, 1992
Term endedAugust 18, 2009
Patent numberCA 1306417 C
Classification (IPC)C08F226/10 +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.