Pipe system and method for its manufacture
CA 2477308 A1 · Owner: Cole, Anthony Thomas · Inventors: Cole, Anthony Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pipe system for transport of corrosive fluids such as crude oil or natural , gas, comprises a corrosion-prone tubular member (1) which is coated with an inner corrosion-resistant lining (3). The tubular member (1) and inner lining (3) provide a flat end in a plane (10, 11) orthogonal to a longitudinal axis (12) of the tubular member (1), which flat end is connected to a flat end of a threaded tubular coupling member (4) having a corrosion-resistant inner surface and screw thread (5). The corrosion-prone tubular member (1) coated with the corrosion-resistant lining (3) may be manufactured in long lengths and cut into a desired lengths whereupon each coupling member (4) may be …
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, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2025.
- 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.