Expired Canadian patentCanada
Multiple stage polymeric modifiers for thermoplastic structural foam process and foamed thermoplastic composition
CA 1107448 A · Owner: Rohm And Haas Company · Inventors: La Bar, Russell A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Certain polymeric modifiers are surprisingly effective for injection molding and extruding thermoplastic structural foam of lower density, improved appearance more uniform cell, structure, and for lowering injection molding cycle time.
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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 August 18, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 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.
FiledMarch 22, 1977
GrantedAugust 18, 1981
Term endedAugust 18, 1998
Patent numberCA 1107448 A
Classification (IPC)C08J9/00 +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.