Jar enhancer
CA 2173797 C · Owner: Lee, B.J. · Inventors: Budney, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A jar enhancer including a housing in which is telescopically mounted a mandrel, with the mandrel rotationally locked within the housing and the housing and, mandrel being spaced apart by an amount R at one location between them to form a chamber of width R. The upper end of the chamber is closed by a face, at least part of which is a shoulder extending inward from the housing and the lower, end of the chamber is closed by a face at least part of, which is a shoulder extending from the mandrel. The housing is sealed to the mandrel above and below the chamber and a port is provided for filling the chamber with compressible fluid. At least one of the shoulders has width W less than R, such …
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 April 10, 1996 and granted December 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2018.
- 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.