Cryogenic air separation system for producing gaseous oxygen
CA 2089913 C · Owner: Union Carbide Industrial Gases Technology Corporation · Inventors: Dray, James R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cryogenic air separation system employing a product boiler coupled with a liquid air supply whereby liquid oxygen as effectively vaporized to produce gaseous oxygen product while providing for steady state operation of the cryogenic air separation plant without significant refrigeration loss.
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 February 19, 1993 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2015.
- 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.