R o-al o /b o -p o_ glasses
CA 1333074 C · Owner: Corning Glass Works · Inventors: Beall, George Halsey; Quinn, Candace Jo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to the preparation of glasses exhibiting low transition temperatures with excellent chemical durability. The glasses consist essentially in, mole%, of:, P2O5 44-58 Al2O3+B2O3 4-10 Na2O+Li2O 10-45 Al2O3 0-7 Na2O 10-30 Cu2O 0-20, B2O3 0-10 Li2O 0-30 Li2O+Cu2O 10-30
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 15, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 15, 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.
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.