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Expired Canadian patentCanada

Wood fiber crumbles

CA 2047558 C · Owner: Morgan, William M. · Inventors: Williams, Bill E.; Morgan, William M.

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

This invention is for wood fiber crumbles and a method, for making the same, for use as an animal litter a petroleum, spill absorbent, floor sweeping material and mulch. Grists, of an assortment of types of wood are combined and admixed dried, moisturized, pelletized, and ground to form crumbles. Depending upon the selection types of wood utilized the, crumbles are capable of rapidly and efficiently absorbing animal excretions and petroleum, minimizing unpleasant odors restricting the growth of microorganisms repelling insect, pests, and adding or removing nitrogen to soil when used as a mulch.

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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

  • Filed July 22, 1991 and granted April 5, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 22, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 22, 1991
GrantedApril 5, 1994
Term endedJuly 22, 2011
Patent numberCA 2047558 C
Classification (IPC)A01K1/01

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedJuly 22, 1991Patent grantedApril 5, 1994Term endedJuly 22, 2011

Sources & verification

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