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Expired Canadian patentCanada

Apparatus for making a post-foaming gel

CA 1330876 C · Owner: Wigglesworth, Paul · Inventors: Wigglesworth, Paul; Ellis, Roger David

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

An apparatus for making a post-foaming gel comprising, a device for pumping a gel base a device for, measuring the flow rate of the pumped gel base a device, responsive to the measuring device for pumping a foaming agent at a flow rate in a predetermined ratio to the flow rate of the gel base, a device for introducing the foaming agent to the gel base, and a device for forming the gel or emulsion from the introducing device.

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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 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 26, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 9, 1988
GrantedJuly 26, 1994
Term endedJuly 26, 2011
Patent numberCA 1330876 C
Classification (IPC)B01F15/04 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedDec 9, 1988Patent grantedJuly 26, 1994Term endedJuly 26, 2011

Sources & verification

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