Grapnel
CA 2105061 A1 · Owner: Davis, Paul · Inventors: Davis, Paul; Batten, Mark V.; Lewis, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a Grapnel which is particularly intended for recovering telecommunications cables from the deep oceans. The Grapnel has special features in that it treats the cable gently, and that it cuts the cables and holds a predetermined side. The Grapnel comprises a rotor (10) which is adapted for rotation about a longitudinal axis of the Grapnel. The rotor is located between two cutting stations (11 and 12). The rotor is preset for rotation in either the clockwise or the anti-clockwise direction. In operation the rotor (10) acquires one run of cable from below and this run of cable is held clear of both cutting stations (11 and 12). The rotor (10) acquires the other run …
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 April 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2014.
- 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.