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Expired Canadian patentCanada

Fire hazard control

CA 1308549 C · Owner: Glaverbel · Inventors: Arker, Paul; Halter, Alain; Hussenet, Joel

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

Fire hazard control. The fire hazard control material disclosed wholly or mainly consists of particles of crushed vitreous material which bear a hydrophobic coating. Optionally the material contains one or more particulate adjuvants selected from salts and/or spherulized vitreous beads which bear a hydrophobic coating. Graphite particles may be used in addition to a salt. The median grain size of the crushed vitreous particles is preferably below 120 micrometres, for example in the range 25 to 35 micrometres.

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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 October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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.
FiledAugust 26, 1988
GrantedOctober 13, 1992
Term endedOctober 13, 2009
Patent numberCA 1308549 C
Classification (IPC)A62D1/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedAug 26, 1988Patent grantedOct 13, 1992Term endedOct 13, 2009

Sources & verification

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