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Expired Canadian patentCanada

Root control bag

CA 1264554 C · Owner: Reiger, Ralph E. · Inventors: Whitcomb, Carl E.; Reiger, Ralph E.

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

A process for growing nursery stock (e.g. trees shrubs, etc.) involving the specific improvement of confining root propagation to a nonwoven porous polymeric fabric bag such that grown through the bag is severely constricted at the fabric, producing a girdling effect and root branching within the bag. Such a process leads to a tightly packed, highly root branched soil ball even in loose sandy loam that is easily removed from the field readily, transported and effective in re-establishing the tree upon transplanting even during the hot summer months.

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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 January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
  • 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 16, 1985
GrantedJanuary 23, 1990
Term endedJanuary 23, 2007
Patent numberCA 1264554 C
Classification (IPC)A01G9/00

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedDec 16, 1985Patent grantedJan 23, 1990Term endedJan 23, 2007

Sources & verification

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