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Expired Canadian patentCanada

Pressure-swing adsorption system and method for nbc collective protection

CA 1317893 C · Owner: Verrando, Marcel G. · Inventors: Barkley, Phillip G.; Verrando, Marcel G.; White, Donald H.

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Abstract From the Canadian patent

A pressure-swing adsorber using type 13X (10 Angstrom) molecular sieve is used in lieu of or ahead of an activated or impregnated carbon filter in an NBC collective protection system. The pressure-swing adsorber removes a much wider range of toxic vapors from air than an impregnated carbon bed is fully, regenerable, and has a long service life. In one system for supplying purified air to a shelter air, is compressed by a gas turbine-driven compressor fed, through an aerosol removal system purified by an, industrial-type pressure-swing adsorber using type 13X molecular sieve, filtered by a Super HEPA filter and expanded to atmospheric pressure in a turbogenerator. In another system for field …

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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 May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
  • 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 29, 1986
GrantedMay 18, 1993
Term endedMay 18, 2010
Patent numberCA 1317893 C
Classification (IPC)B01D53/02 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedJuly 29, 1986Patent grantedMay 18, 1993Term endedMay 18, 2010

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