Device for the release of systemic active substances to plants and the use thereof
CA 2020665 C · Owner: Hoffmann, Hans-Rainer · Inventors: Maass, Jurgen; Hoffmann, Hans-Rainer; Roreger, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a device for the release of systemic active substances to plants consisting of a backing layer and an active substance reservoir, which device is characterized in that the active substance reservoir is deformable and adaptable to uneven surfaces and that it is suitable for releasing active substances through surfaces of plants consisting of secondary, hardened superficial tissues not being covered by a cuticula.
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
- Filed July 6, 1990 and granted January 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2012.
- 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.