Controlled cryogenic liquid delivery
CA 1279044 C · Owner: Vacuum Barrier Corporation · Inventors: Stearns, Thornton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A controlled stream of liquid cryogen is delivered from a system comprising: a) a source of liquid cryogen at a substantially constant pressure remote from the outlet; b) a conduit connecting the liquid cryogen source to the outlet; c) means to maintain cryogen flowing through the conduit sub-cooled at all points along the conduit (i.e. at any given point in the conduit, the cryogen's equilibrium vapor pressure is below the pressure experienced at that point in the conduit), and to deliver the cryogen to the outlet at a temperature equal to or below its boiling point at atmospheric pressure; and d) a flow-rate control restriction, positioned in the conduit. By maintaining the cryogen …
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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
- Granted January 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 2008.
- 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.