Expired Canadian patentCanada
Stannosilicates and preparation thereof
CA 1329696 C · Owner: Corcoran, Edward William, Jr. · Inventors: Vaughan, David Evan William; Corcoran, Edward William, Jr.; Eberly, Paul Earl, Jr.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Highly crystalline stannosilicates are formed by reacting a tin salt with a source of silica and an hydroxide of a Group lA or Group llA metal or an amine.
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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 May 24, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 16, 1988
GrantedMay 24, 1994
Term endedMay 24, 2011
Patent numberCA 1329696 C
Classification (IPC)C01G19/00 +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.