Tubular member for sealing a reciprocating rod
CA 2029254 C · Owner: Kuze, Yoshikazu · Inventors: Kuze, Yoshikazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tubular member comprises a tubular body made of rubber. The tubular body has a base portion a head, portion, and a plurality of annular grooves or annular projections formed in an inner wall of the body. The base portion is arranged to be secured to a guide member of an actuator, and the head portion is arranged to be engaged with a rod slidably supported in the guide member.
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 2, 1990 and granted October 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2012.
- 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.