Expired Canadian patentCanada
Pump-mechanical seal construction
CA 1262741 C · Owner: Wentworth, Robert S. · Inventors: Wentworth, Robert S.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pump-mechanical seal assembly (12) in which the setting of the mechanical seal is maintained when the pump impeller's position is adjusted relative to the pump housing, and means to accomplish this objective.
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 November 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 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.
FiledJanuary 24, 1985
GrantedNovember 7, 1989
Term endedNovember 7, 2006
Patent numberCA 1262741 C
Classification (IPC)F04D29/04 +2 more
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.