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Expired Canadian patentCanada

Method and apparatus for quick filling gas cylinders

CA 1304728 C · Owner: Notaro, Frank · Inventors: Notaro, Frank; Nowobilski, Jeffert John; Acharya, Arun

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method and apparatus for quick-filling a full charge of compressed natural gas into an adsorbent filled cylinder by contacting the compressed gas with solid adsorbent to achieve adsorption of liquid gas thereon, withdrawing natural gas at an elevated temperature and cooling the natural gas below ambient temperature for recycle into contact with the solid adsorbent said, recycling and cooling being continued until the average temperature of the adsorbed gas and the adsorbent bed at elevated pressure is about atmospheric ambient temperature. D-15,540

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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 July 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 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.
FiledApril 22, 1988
GrantedJuly 7, 1992
Term endedJuly 7, 2009
Patent numberCA 1304728 C
Classification (IPC)B01D53/04 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedApril 22, 1988Patent grantedJuly 7, 1992Term endedJuly 7, 2009

Sources & verification

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