Expired Canadian patentCanada
Prevention of degradation of thermo-electric materials through diffusion of bridging materials
CA 744482 A · Owner: Wald, Fritz · Inventors: Macphee, Colin A.A.; Wald, Fritz
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 October 11, 1966. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 11, 1983.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 22, 1963
GrantedOctober 11, 1966
Term endedOctober 11, 1983
Patent numberCA 744482 A
Classification (IPC)H01L23/34 +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.