Expired Canadian patentCanada
Anti-weepage valve for rotating seals
CA 1234051 A · Owner: United Technologies Corporation · Inventors: Slayton, Richard M.
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, Anti-Weepage Valve For Rotating Seals For a rotating carbon seal that requires lubrication a rotating self-actuating weepage valve responding to speed and/or pressure for closure of the valve at a given operating condition.
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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 15, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 15, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 17, 1983
GrantedMarch 15, 1988
Term endedMarch 15, 2005
Patent numberCA 1234051 A
Classification (IPC)F01D25/00 +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.