Root control bag
CA 1264554 C · Owner: Reiger, Ralph E. · Inventors: Whitcomb, Carl E.; Reiger, Ralph E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract 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.
Read the whole patent
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.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.