Seal
CA 2082567 C · Owner: Nowak, Stanley · Inventors: Dartnall, William John; Nowak, Stanley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seal for use between a pair of elements (11 and 12) which are capable of relative movement with respect to each other where one element (11) has a substantially circular cross section, said seal comprising a bush (16) configured to be received in close abutting relationship with the one element (11) and being associated at one end with a sealing element (17) of corresponding cross-section said sealing, element (17) having a helical configuration the opposed, axial faces of the helix are of complementary configuration and are in close abutting relationship the opposed axial, faces of the helix and each bush are of a complementary configuration and are in close abutting relationship said, …
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 November 10, 1992 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2014.
- 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.