Expired Canadian patentCanada
Electromagnetic radiation suppressing distributor rotors
CA 1250874 A · Owner: General Motors Corporation · Inventors: Welker, Edward E.; Rockwell, Lynn A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, An ignition distributor rotor electrode provided with a coating of polyester-polyamide-imide varnish suppresses the generation of electromagnetic radiation of radio frequency.
Read 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 March 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 7, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 14, 1985
GrantedMarch 7, 1989
Term endedMarch 7, 2006
Patent numberCA 1250874 A
Classification (IPC)F02P7/02
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.