Expired Canadian patentCanada
Polymerizates of olefinic nitriles
CA 1108345 A · Owner: The Standard Oil Company · Inventors: Li, George S.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymer resins which are thermoplastic and high softening with good impermeability to gases are composed of an olefinically unsaturated nitrile, such as acrylonitrile an N-vinyl imide, such as N-vinyl succinimide and indene.
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 September 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 7, 1977
GrantedSeptember 1, 1981
Term endedSeptember 1, 1998
Patent numberCA 1108345 A
Classification (IPC)C08F244/00 +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.