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Expired Canadian patentCanada

Low energy ammonia synthesis process

CA 1089629 A · Owner: Pullman Incorporated · Inventors: Becker, Colman L.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

An improved synthesis loop for the production of ammonia, has a low pressure, i.e. less than 100 atmospheres, a water absorption recovery system which utilizes low level heat recovered from the process for producing the synthesis gas to distill the ammonia-water mixture and an ammonia absorption refrigeration system which utilizes the same distillation column for both the water absorption system and the refrigeration system.

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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 November 18, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 18, 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.
FiledApril 16, 1980
GrantedNovember 18, 1980
Term endedNovember 18, 1997
Patent numberCA 1089629 A
Classification (IPC)C01C1/04

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Application filedApril 16, 1980Patent grantedNov 18, 1980Term endedNov 18, 1997

Sources & verification

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