Apparatus for use in renovation of tube systems in particular sewer tube systems
CA 2053243 C · Owner: Gammelgaard, Kresten · Inventors: Gammelgaard, Kresten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an apparatus (2) for use in, renovating tube systems in particular, sewer tubes of circular cross-section and comprising a frame (4) on, wheels (6) which frame is arranged, to be moved inside a tube in such a way that the position of the apparatus in the tube is known, and a motor-driven tool (30) which is arranged , for cutting away items protruding into the tube and/or for, forming side openings in the tube wall or in a tube lining, the motor, driven tool (30) is mounted on a carrier arm (28) protruding beyond an, end part of a portion (14) of the apparatus which portion is journaled, so as to be rotatable in relation to said frame (4) around a longitudinal, axis the carrier arm …
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 26, 1990 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2012.
- 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.