A lip seal
CA 2462060 C · Owner: James Walker & Company Limited · Inventors: Armour, James Edward Gordon; Hankin, Alon; Elliott, Godfrey Duncan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lip seal comprises resilient annular sealing means 2 3, having a sealing , lip 4 , adapted for sealing engagement at an end 9 thereof with a relatively movable shaft 5 and a valve lip 6, the lips being in use, normally closed, and means , 11 13, for injecting fluid into a space 7 between the closed lips 4 6 at , sufficient , pressure to cause the lips to open during use to allow the fluid to flow towards , the end 9 of the sealing lip 4.
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
- Filed March 24, 2004 and granted June 25, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.