Weed hook
CA 2290932 C · Owner: Barber, Marvin M. · Inventors: Barber, Marvin M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A weeding implement, comprising an elongate handle having a longitudinal axis; and an, attachment at one end of said handle said attachment comprising a straight shank inserted, into one end of said handle and extending along said longitudinal axis; said shank having, a length thereof, extending along said axis from said handle which is a major portion of that, of said attachment, a straight portion extending at an angle from said straight shank, a, straight transverse portion extending across said longitudinal axis and laterally at opposite, sides of said axis a curved intermediate portion connecting said straight portion to one end, of said transverse portion at one side of said …
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 November 26, 1999 and granted June 17, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2021.
- 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.