Replacement pipe section for a defective pipeline
CA 2015155 C · Owner: Tuboscope, Inc. · Inventors: Abbema, William D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A replacement pipe section for a defective pipeline that includes two tubular members telescopically assembled so that the assembly has an adjustable overall length. The replacement pipe section includes a collar that can be disposed around and attached to both tubular members thereby fixing, the overall length of the assembly. The ends of the replacement section can then be attached to the fixed open ends of the pipeline to create a fluid-tight assembly. The replacement pipe section is particularly effective for permanently replacing a defective section of an internally coated pipeline.
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 23, 1990 and granted February 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 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.