Expired Canadian patentCanada
Polysilazane thermosetting polymers for use in chromatographic systems and applications
CA 2546898 C · Owner: Sigma-Aldrich Co. · Inventors: Linton, Christopher M.; Betz, William R.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An amorphous non-glassy ceramic composition that may be prepared by curing calcining and/or pyrolyzing a precursor material comprising silicon a Group , III metal, a Group IVA metal and/or a Group IVB metal.
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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 November 19, 2004 and granted November 22, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 19, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 19, 2004
GrantedNovember 22, 2016
Term endedNovember 19, 2024
Patent numberCA 2546898 C
Classification (IPC)B01J20/28 +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.