A process for rotational molding of a thermoplastic liner in an elongated pipe or tubing section
CA 2304414 A1 · Owner: Ico, Inc. · Inventors: Lauzon, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for coating the inside diameter of an elongated pipe or tubing section with a, uniform thermoplastic layer having a thickness greater than 0.020 inches includes inserting a, uniform distribution of coating material granules within the pipe or tubing section, then heating the, elongated pipe or tubing section while rotating the elongated pipe or tubing section. Once the inside, diameter of the elongated pipe or tubing section has been coated it is , cooled.
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 4, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 4, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2022.
- 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.