Gas pressure regulator
CA 2216920 C · Owner: Hood, Mark E. · Inventors: Hostutler, John D.; Olds, Charles M.; Lambeth, David W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A two stage gas pressure regulator (10) with a body housing (12) having a gas inlet (14) and a gas outlet (16), and a common interior wall (28) dividing the body housing (12) into two chambers (24 26), forming , two pressure reducing stages. Respective intersecting fluid passageways through the common interior wall (28) communicate the first stage to the second stage and provide a gauge pressure tap (18) on the body housing (12), the intersecting passageways meeting at an intersection point within the common interior wall (28). Respective diaphragms (38) are provided for each stage and a cover has a vent venting , the volume defined between the cover and the second stage diaphragm. A …
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 March 13, 1996 and granted October 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 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.