Improved discrete constant pressure system for staging solid-vapor compounds
CA 2123901 C · Owner: Rocky Research · Inventors: Rockenfeller, Uwe; Kirol, Lance D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus comprises a plurality of two or more reaction chambers (12 14, 16, 18), each having a different compound therein comprising a solid reactant adsorbent and a gaseous reactant adsorbed thereon, each of said compounds having a different gaseous reactant vapor pressure, substantially independent of the concentration of the gaseous reactant, and having an. ascending order of gaseous reactant vapor pressure wherein the adsorption temperature of a lower vapor pressure compound at adsorption pressure is at lest 8 °C higher than the desorption temperature of the next successive higher vapor pressure compound at desorption pressure, means (17, 19, 52 54, 56) for directing heat …
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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 24, 1992 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 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.
Timeline
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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.