Expired Canadian patentCanada
Glass for the passivation of semiconductor devices
CA 1075271 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Trap, Hendrikus J. L.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Passivating glass for semiconductor devices with a composition in mol. % in the range of: The glass contains water expressing in cm3 of water vapor, reduced to 0°C and 75 cm Hg per cm3 of glass between 10x10-4 and 100x10-4. - 19 -
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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 April 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 8, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedApril 8, 1980
Term endedApril 8, 1997
Patent numberCA 1075271 A
Classification (IPC)H01L21/31 +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.