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Expired Canadian patentCanada

Methods and apparatus for gaseous separation

CA 1107204 A · Owner: Wang, Chia-Gee · Inventors: Wang, Chia-Gee

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Abstract From the Canadian patent

Methods and apparatus for separation of mixtures of gaseous materials having different molecular weights such, as gaseous isotope mixtures, in which a moving surface is employed to apply an impulsive local centrifugal bending to the gas mixture laterally of the direction of motion of the surface and to produce a density gradient in the laterally accelerated gas, and in which the gas is separated in respect of the molecular weight gradient thereby produced. -1-

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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 August 18, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 26, 1977
GrantedAugust 18, 1981
Term endedAugust 18, 1998
Patent numberCA 1107204 A
Classification (IPC)B01D59/18

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedJuly 26, 1977Patent grantedAug 18, 1981Term endedAug 18, 1998

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