Core barrel adjusting system
CA 2006607 C · Owner: Laukart, Jakob · Inventors: Behre, Hans-Ulf; Laukart, Jakob
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention comprises a novel core drilling tool system which allows for less stressful extended axial settings and adjustments in a core barrel environment. More particularly the present invention discloses the, formation of the setting device as a separate spacer apparatus which provides a setting method independent of the suspension of the inner unit in the outer housing of a core drilling tool thereby allowing for axial settings over a long adjustment path which are generally free of stress due to the weight of the inner unit.
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 December 22, 1989 and granted February 11, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2011.
- 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.