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Expired Canadian patentCanada

Building material and method of manufacturing same

CA 1214477 A · Owner: Wilde, Bryce B. · Inventors: Wilde, Bryce B.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A building material and method of manufacture thereof wherein the building material comprises a concrete-type mixture containing fibers or other waste products as a component of the mixture, and the method of manufacture includes adding lime in preselected quantities or ratios by volume to the organic waste produce, permitting the limed mixture to season and cure to produce an aggregate material for use in substantially any standard concrete recipe for creating a building material of great strength which, is lightweight and substantially fireproof.

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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 November 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 2, 1983
GrantedNovember 25, 1986
Term endedNovember 25, 2003
Patent numberCA 1214477 A
Classification (IPC)C04B22/06

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedSep 2, 1983Patent grantedNov 25, 1986Term endedNov 25, 2003

Sources & verification

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