Apparatus for hydrocleaning the exterior surfaces of pipelines and the like
CA 2011196 C · Owner: Chapman, Gordon R. · Inventors: Andruik, Donald R.; Chapman, Gordon R.; Seale, James B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydrocleaning apparatus for pipelines and the like includes a frame capable of advancing lengthwise of the pipeline, such frame carrying a plurality of liquid jetting modules which, in use, are disposed in an array around the pipeline surface to enable cleaning of the entire surface to be effected. The frame can be opened up to allow the apparatus to be fitted to or removed from a continuous pipeline. The frame arrangement and module mounting system are designed to provide good cleaning efficiency and proper orientation of the various modules in spite of pipeline irregularities including out-of-round conditions, uneven coating thicknesses and wrinkles. A pivoting module mount helps to …
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 February 28, 1990 and granted May 12, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 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.