Strengthened glass-ceramic article and method
CA 1197266 A · Owner: Corning Glass Works · Inventors: Beall, George H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The glass-ceramic disclosed is characterized by a lithium aluminosilicate crystal phase having a very low coefficient of thermal expansion and a residual glassy phase of substantial amount and higher coefficient of expansion usually a boro-, silicate or boroaluminosilicate glass. The two phases form a dilatant system wherein the thermal expansion curve changes markedly in character at a transition point in the range of 500-750°C. the crystal phase dominating below that temperature and the glass phase controlling at higher temperatures.
Read the whole patent
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 November 26, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 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.