Expired Canadian patentCanada
Impact resistant graft copolymers
CA 2061377 C · Owner: Denicola, Anthony J. Jr. · Inventors: Denicola, Anthony J. Jr.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are graft copolymers comprising a propylene polymer material backbone grafted with a mixture of at least two different copolymerizable monomers having improved impact resistance without decrease in clarity.
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
- Filed February 18, 1992 and granted December 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 18, 1992
GrantedDecember 9, 1997
Term endedFebruary 18, 2012
Patent numberCA 2061377 C
Classification (IPC)C08F255/00 +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.