Expired Canadian patentCanada
High shearing of polymer blends to elastoplastics
CA 1236620 A · Owner: Monsanto Company · Inventors: Shen, Kuo-Shein; Abdou-Sabet, Sabet
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 process is described for the preparation of thermoplastic elastomers comprising a blend of plastic and cured rubber by dynamic vulcanization wherein the blend is subjected to high shear.
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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 May 10, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 10, 2005.
- 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 22, 1983
GrantedMay 10, 1988
Term endedMay 10, 2005
Patent numberCA 1236620 A
Classification (IPC)C08J3/24 +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.