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Expired Canadian patentCanada

Azeotropic compositions of 1,1-dichloro-1- fluoroethane and methanol/ethanol

CA 1332657 C · Owner: Redenbaugh, Jill Michele · Inventors: Redenbaugh, Jill Michele; Merchant, Abid Nazarali

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Abstract From the Canadian patent

TITLE, Azeotropic Compositions of, 1,1-Dichloro-1-Fluoroethane and Methanol/Ethanol ABSTRACT OF THE INVENTION, Azeotropic mixtures of 1,1-dichloro-1fluoroethane (HCFC-141b) with methanol or ethanol the, azeotropic mixtures being useful in solvent cleaning applications.

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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 October 25, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 25, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 19, 1989
GrantedOctober 25, 1994
Term endedOctober 25, 2011
Patent numberCA 1332657 C
Classification (IPC)C11D7/30 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJan 19, 1989Patent grantedOct 25, 1994Term endedOct 25, 2011

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.