Injection capsule for treating trees
CA 1302708 C · Owner: British Columbia Hydro And Power Authority · Inventors: Dinsmore, William Russell; Johnson, Robert Ernest
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An injection capsule to treat trees and woody plants comprising a receptacle portion to hold a chemical to treat trees and woody plants. The receptacle portion has a closed end and an open end, the closed end being formed with a bore extending internally through the receptacle portion from the closed end to the open end. The bore houses a screw fastener movable along the, length of the bore and guided by the walls of the bore to allow the injection capsule to be attached to a tree or woody plant. The bore is formed with a narrowed diameter section to limit the travel of the screw fastener as it is pushed through the internal bore and driven into a tree or woody plant in order to hold the …
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 June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
- 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.