Layered oxide materials and swollen and pillared forms thereof
CA 2098396 C · Owner: Roth, Wieslaw Jerzy · Inventors: Kresge, Charles Theodore; Simmons, Kenneth Gregory; Vartuli, James Clarke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a crystalline oxide material with a characteristic X-ray diffraction pattern comprising the above lines. This material may be a layered material which is swollen or pillared. Upon , calcination of the swollen material the layers col-, lapse and condense upon one another in a disordered fashion to form a nonswellable material. However, the swollen layered material may be intercalated with polymeric oxide pillars to maintain layer separation, even after calcination.
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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 January 10, 1992 and granted October 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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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.