Expired Canadian patentCanada
Method of producing electronic semiconductor devices having a monocrystalline body with zones of respectively different conductance
CA 718581 A · Owner: Siemens-Schuckertwerke Aktiengesellschaft · Inventors: Konrad Reuschel
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 September 21, 1965. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 21, 1982.
- 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—
GrantedSeptember 21, 1965
Term endedSeptember 21, 1982
Patent numberCA 718581 A
Classification (IPC)H01L
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.