Potassium fluorrichterite glass-ceramics and method
CA 1204455 A · Owner: Corning Glass Works · Inventors: Megles, John E. Jr.; Beall, George H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a highly crystalline glassceramic article exhibiting superior toughness against fracture propagation, a modulus of rupture in excess of 20,000 psi, a predominant crystal phase of potassium fluorrichterite, and having an overall composition consisting essentially of, SiO2 50-70, CaO 4-15 MgO 8-25, F 3-8, Na2O 2-9, K2O 2-12, Li2O 0-3 Al2O3 0-7, Canasite may be a secondary phase but a crystal phase, composed essentially of potassium fluorrichterite is preferred for dinnerware.
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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 13, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 13, 2003.
- 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
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.