Expired Canadian patentCanada
Chromium catalyst compositions
CA 2100144 C · Owner: Benham, Elizabeth Ann · Inventors: Badley, Rickey Don; Mcdaniel, Max Paul; Benham, Elizabeth Ann
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Chromium catalyst compositions are provided. Theses chromium catalyst compositions can be used to polymerized olefins. The resulting polymerization product can have improved properties.
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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 July 8, 1993 and granted December 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 8, 1993
GrantedDecember 29, 1998
Term endedJuly 8, 2013
Patent numberCA 2100144 C
Classification (IPC)C08F4/78 +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.