Expired Canadian patentCanada
Large-pored molecular sieves with charged octahedral titanium and charged tetrahedral aluminum sites
CA 2014666 C · Owner: Koermer, Gerald S. · Inventors: Koermer, Gerald S.; Thrush, Kathleen A.; Madon, Rostam J.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A crystalline-titanium-aluminum-silicate molecular sieve is disclosed having both di-charged octahedrally coordinated titanium and mono-charged tetrahedrally coordinated aluminum in its framework.
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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 April 17, 1990 and granted April 29, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 17, 1990
GrantedApril 29, 1997
Term endedApril 17, 2010
Patent numberCA 2014666 C
Classification (IPC)B01J29/04 +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.