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Expired Canadian patentCanada

Method of fabricating a gas transmitting body

CA 1069665 A · Owner: Fmc Corporation · Inventors: Kyrias, Gilbert M.

CIPO record

Overview

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

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Abstract From the Canadian patent

Method and apparatus for bubble shearing are disclosed in which nascent bubbles are formed by flowing gas through the very small capillary openings (no larger than about 100 microns in diameter) of a gas diffusing surface into a moving liquid that shears the nascent bubbles off as it moves past the capillary openings. In the apparatus the gas diffusing surface, forms one wall of a liquid transmitting slot through which the shearing liquid flows as it shears off fine gas bubbles. A gas transmitting body or gas "bar" for use in the apparatus of the invention is disclosed as well as, a method of fabricating such a gas bar.

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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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 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.
Filed—
GrantedJanuary 15, 1980
Term endedJanuary 15, 1997
Patent numberCA 1069665 A
Classification (IPC)B29D23/00

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJan 15, 1980Term endedJan 15, 1997

Sources & verification

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