Process for the manufacture of 1,1,1- trifluorodichloroethane and 1,1,1,2- tetrafluorochloroethane
CA 1310022 C · Owner: Manzer, Leo Ernest · Inventors: Rao, Velliyur Nott Mallikarjuna; Gumprecht, William Henry; Manzer, Leo Ernest
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE, IMPROVED PROCESS FOR THE MANUFACTURE OF 1,1,1-TRIFLUORODICHLOROETHANE AND, 1,1,1,2-TETRAFLUOROCHLOROETHANE ABSTRACT OF THE DISCLOSURE, An improved gas-phase process for the manufacture of 1,1,1-trifluorodichloroethane and/or 1,1,1,2-tetrafluorochloroethane by contacting a suitable tetrahaloethylene and/or pentahaloethane with hydrogen fluoride in the presence of Cr2O3 prepared, by pyrolysis of (NH4)2Cr2O7, the reaction being conducted under controlled conditions whereby the production of pentafluoroethane is minimized.
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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 November 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
- 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.