Defoliation device
CA 2250592 A1 · Owner: Glassford, David Michael · Inventors: Glassford, David Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus is provided for stripping leaves and offshoots from stalks. The apparatus has a table with upper and lower faces. The table has a slot extending between the upper and lower faces. Beneath the slot is a rotatable cutter which has at least one blade. Preferably the cutter has a number of helically arranged blades, like a push-type lawn mower. A vacuum pulls air through the slot from above the table, and past the rotating blades. Stalks with leaves or stalks are passed over the slot so that the stalk is parallel to the slot. Leaves are sucked into the slot and when the leaves reach beneath the table they are cut of by the rotating blades. The leaves are transported by the vacuum …
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 October 16, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2020.
- 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.