Expired Canadian patentCanada
Ep or epdm blends containing polypropylene
CA 1163741 A · Owner: Polysar International S.A. · Inventors: Cinadr, Bernard F.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ethylene and propylene copolymers and terpolymers are modified by addition of up to about 20% of crystalline polypropylene in order to reduce plastic flow which said copolymers and terpolymers undergo during storage.
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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 March 13, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 2001.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 20, 1981
GrantedMarch 13, 1984
Term endedMarch 13, 2001
Patent numberCA 1163741 A
Classification (IPC)C08L23/16
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.