Patent Yard Sign in
Expired Canadian patentCanada

Process and apparatus for concentrating a component of a gaseous mixture

CA 1137421 A · Owner: Toyo Engineering Corporation · Inventors: Wakao, Noriaki

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

Title of the Invention:, Process and Apparatus for Concentrating a Component of a Gaseous Mixture, Abstract of the Disclosure:, Disclosed is a process for concentrating a component of a gaseous mixture by the utilization of Knudsen diffusion the, process comprising the steps of feeding the gaseous mixture in the form of a pulse to one surface of a porous membrane and collecting the gas diffused out of the opposite surface of the membrane during a short transient period. Also disclosed are a continuous process based on the same principle and apparatus for carrying out this continuous process. - 1 -

Read the whole patent

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 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 19, 1980
GrantedDecember 14, 1982
Term endedDecember 14, 1999
Patent numberCA 1137421 A
Classification (IPC)B01D53/22 +1 more

Timeline

Timeline From CIPO dates

1981198319851987198919911993199519971999Application filedFeb 19, 1980Patent grantedDec 14, 1982Term endedDec 14, 1999

Sources & verification

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