Expired Canadian patentCanada
Strain sensing valve
CA 2059592 C · Owner: Thrall, David Edmund · Inventors: Balaschak, James John; Thrall, David Edmund
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A strain sensing valve is provided with sensors on a depression on its stem, permitting calibration and electronic adjustment prior to assembly of the stem into the valve.
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 January 17, 1992 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 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.
FiledJanuary 17, 1992
GrantedDecember 21, 1999
Term endedJanuary 17, 2012
Patent numberCA 2059592 C
Classification (IPC)F16K51/00 +2 more
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.