Expired Canadian patentCanada
Aorosol foam composition based on a polymer made from quaternized cellulose and an anionic polymer
CA 1288357 C · Owner: Dupuis, Christine · Inventors: Dupuis, Christine; Grollier, Jean-Francois
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 September 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 15, 1987
GrantedSeptember 3, 1991
Term endedSeptember 3, 2008
Patent numberCA 1288357 C
Classification (IPC)C09K3/30 +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.