Expired Canadian patentCanada
Treatment compositions
CA 1328811 C · Owner: Feinland, Raymond · Inventors: Feinland, Raymond; Demarco, Richard; Jachowicz, Janusz
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The treatment of proteinaceous or other substrates to render them more manageable and more stable against chemical treatment involves the use of aqueous compositions containing cationic (meth)acrylic copolymers.
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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 April 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 24, 1988
GrantedApril 26, 1994
Term endedApril 26, 2011
Patent numberCA 1328811 C
Classification (IPC)A61K8/81 +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.