Expired Canadian patentCanada
Process for the preparation of alkylaluminoxanes on inert support materials
CA 2127671 C · Owner: Gurtzgen, Stefan · Inventors: Gurtzgen, Stefan
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 invention relates to a process for the preparation of alkylaluminoxanes immobilized on inert support materials, characterized in that alkylaluminoxanes present in the form of dispersions are fixed on inert support materials.
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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, 1994 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2016.
- 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, 1994
GrantedMarch 16, 1999
Term endedJuly 8, 2014
Patent numberCA 2127671 C
Classification (IPC)C08F4/52 +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.