Apparatus and methods of producing a deformed pipe
CA 2068841 C · Owner: Thames Water Services Limited · Inventors: Lippiatt, Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for and a method of deforming a pipe comprises a wedge-like elongate member arranged in use to lie alongside a path of movement of the pipe to be deformed, and project increasingly into the pipe as the pipe moves past it in the forward direction of its path; and pipe constraint means disposed about the path of travel of the pipe in association with the wedge member whereby in use a pipe to be deformed in its path of travel is engaged progressively increasingly by the wedge-like member whereby to indent progressively a part of the wall of the pipe such as to deform the pipe longitudinally.
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 May 15, 1992 and granted April 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 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.