Method of controlling environmental conditions in the proximity of vegetation or crops with the aid of protective sheeting, protective sheeting for use in this method, and a protective device comprising sheeting
CA 1292874 C · Owner: Stork Perforated Products B.V. · Inventors: Morssinkhof, Gerhardus Hermanus; Leenheer, Adrianus; Vogel, Lubbertus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for controlling the environmental conditions in the proximity of vegetation or crops in the cultivation of plants is described in which use is made of protective sheets comprising a large number of microperforations having each a protruded rim, said microperforations having a diameter between 50 and 2000 µm and being present in a density of between 25 and 40000 microperforations per cm2. The invention also relates to plastics sheeting For use in said method and to a protective device for use in a greenhouse provided with such sheeting.
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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 December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
- 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
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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.