Expired Canadian patentCanada
Novel polyetherester based prepolymers and elastomers made therefrom
CA 2006166 C · Owner: Mafoti, Robson · Inventors: Mafoti, Robson
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to isocyanate terminated prepolymers prepared from polyetheresters and isocyanates, and to the process of making elastomers and elastomers so produced.
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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
- Filed December 20, 1989 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 20, 1989
GrantedFebruary 22, 2000
Term endedDecember 20, 2009
Patent numberCA 2006166 C
Classification (IPC)C08G18/32 +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.