Expired Canadian patentCanada
Starting means for gas or vapour electric apparatus
CA 97609 A · Owner: The Cooper Hewitt Electric Company · Inventors: Thomas, Percy Holbrook
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 February 20, 1906. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 1923.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 16, 1904
GrantedFebruary 20, 1906
Term endedFebruary 20, 1923
Patent numberCA 97609 A
Classification (IPC)—
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.