Male coupling with moveable threaded segments
CA 2258808 C · Owner: Thread Technology, Inc. · Inventors: Cabahug, Eric F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A male coupling with movable threaded segments (40) consisting of a shaft (12) a sleeve (25) mounted to move along the shaft a plurality of threaded segments (40) surrounding the shaft (12) and mounted to move inwardly and outwardly relative to the shaft to effectively vary the outer diameter of the assembled threaded segments the sleeve (25) and threaded segments (40) including surfaces adjoining each other such that movement of the sleeve in one direction causes the threaded segments to move inwardly toward the shaft (12) and a spring (24) resiliently urging the threaded segments outward.
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 6, 1998 and granted July 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2020.
- 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.