Improvements in two stage gas pressure regulators
CA 2392850 C · Owner: Hostutler, John D. · Inventors: Hood, Mark E.; Lambeth, David W.; Hostutler, John D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas pressure regulator for controlling the gas flow through an inlet orifice has a diaphragm actuated lever arm which includes a slotted end, with the slot matching a stepped gas flow controlling disc. The disc is stepped to match the lever end slot so as to trap the disc within the lever slotted end. The inlet orifice can be formed by casting and without further machining or additional orifice components.
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 September 30, 2003. 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.