Expired Canadian patentCanada
Valve
CA 137431 A · Owner: Bray, Horatio Nelson · Inventors: Bray, Horatio Nelson
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 December 19, 1911. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 19, 1928.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 28, 1910
GrantedDecember 19, 1911
Term endedDecember 19, 1928
Patent numberCA 137431 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.