Transparent glass-ceramics containing mullite
CA 1196032 A · Owner: Corning Glass Works · Inventors: Taylor, Mark P.; Beall, George H.; Macdowell, John F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is concerned with the production of stantially transparent glass-ceramic articles containing mullite as the predominant crystal phase which can be prepared by crystallizing in situ precursor glasses capable of being melted at temperatures no higher than 1650°C. The inventive articles consist essentially, in weight percent of 1070%, SiO2, 7-40% B2O3, 14-50% Al2O3 0-35% RO, wherein RO consists, of at least one member of the group in the indicated proportions of 015% MgO, 1-20% CaO, 0-30% SrO, 0-30% BaO and 0-30% PbO, and 0-30% R2O, wherein R2O consists of at least one member of the group in the indicated proportions of 0-10% Li2O 0-, 15% Na2O, 0-25% K2O, 0-25% Rb2O, and 0-25% …
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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 October 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2002.
- 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.