Expired Canadian patentCanada
Ballast apparatus for starting and operating gaseous discharge lamps
CA 694792 A · Owner: General Electric Company · Inventors: Daniel Lovinger
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 22, 1964. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 1981.
- 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 22, 1964
Term endedSeptember 22, 1981
Patent numberCA 694792 A
Classification (IPC)F21V23/00 +2 more
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.