A sub-ducting apparatus
CA 2480676 A1 · Owner: Mayhew, Andrew John · Inventors: Medlen, Nicholas John; Mayhew, Andrew John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sub-ducting apparatus (10) comprising a sub-duct (12) and a remotely , operable path-finding head (20) for facilitation of the subduct into a duct (1). The head is detachable at the end of the subduct and includes an expandable portion (20A, 20B) or a cutter (20C 20D), as a result of which, twisted or jammed cables may be removed from the duct.
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 March 25, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2025.
- 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.