Expired Canadian patentCanada
Catalyst and method for producing relatively narrow molecular weight distribution olefin polymers
CA 1267646 C · Owner: The Dow Chemical Company · Inventors: Coleman, William M. Iii
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymers of .alpha.-olefins having a relatively narrow molecular weight distribution are prepared by employing a Ziegler-Natta magnesium halide supported catalyst containing both titanium and vanadium. 32,992A-F
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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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 3, 1986
GrantedApril 10, 1990
Term endedApril 10, 2007
Patent numberCA 1267646 C
Classification (IPC)C08F4/68 +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.