Expired Canadian patentCanada
Apparatus for feeding abrasive to grinding machines
CA 254635 A · Owner: The Libbey Owens Sheet Glass Company · Inventors: Joseph P. Crowley
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 13, 1925. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 1942.
- 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—
GrantedOctober 13, 1925
Term endedOctober 13, 1942
Patent numberCA 254635 A
Classification (IPC)B24C5/00
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.