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Expired Canadian patentCanada

Method and apparatus for producing dry compressed air for electrical gear

CA 1090561 A · Owner: Bbc Brown, Boveri & Company Limited · Inventors: Kramer, Wilhelm

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Abstract From the Canadian patent

Abstract of the Disclosure An apparatus and a method for producing dry compressed air to be used for electrical switchgear es-, pecially for high-tension switchgear is disclosed in which, humidity is extracted from the air in a subsequently arranged sorption dryer, with one portion of the dried air being used to regenerate a drying agent of the drying apparatus. The drying apparatus includes a cylindrical inner housing which is used for the pre-drying of the air, an outer housing which surrounds the former in jacket form for the final drying and a desorption volume. An electric heating rod protrudes concentrially into the inner housing and is covered by either a baffle device or a pipe so …

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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 December 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 1997.
  • 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 24, 1978
GrantedDecember 2, 1980
Term endedDecember 2, 1997
Patent numberCA 1090561 A
Classification (IPC)B01D53/26

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJan 24, 1978Patent grantedDec 2, 1980Term endedDec 2, 1997

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