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Expired Canadian patentCanada

Composite flooring felt for vinyl flooring containing latexes and an activator and a process for preparing the same

CA 1305805 C · Owner: Camisa, John D. · Inventors: Camisa, John D.

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

The present invention is a composite flooring felt for vinyl flooring containing a blend of latexes and an activator. Also included is a process for preparing the flooring felt composite. The process can additionally contain a wet strength resin and a flocculant. The activator is a poly(dimethyl diallyl ammonium chloride). This composite flooring felt has significantly improved properties over those which do not contain the activator. 35,0$7-F

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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 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 28, 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.
FiledJanuary 10, 1989
GrantedJuly 28, 1992
Term endedJuly 28, 2009
Patent numberCA 1305805 C
Classification (IPC)D21H23/76 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJan 10, 1989Patent grantedJuly 28, 1992Term endedJuly 28, 2009

Sources & verification

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