Metal tubing coated with multiple layers of polymeric materials
CA 2282346 A1 · Owner: Bundy Corporation · Inventors: Soles, Dennis C.; Hsich, Henry S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coated metal tubing arrangement comprises a metal tube (10). An inner layer (12) of a first polymeric material is bonded to the tube (10) to provide corrosion protection. The first polymeric material has a high crystallinity a , dampening factor of less than 0.05 and a flexural modulus of at least 100 MPa. An outer layer (14) of a second polymeric material is extruded around the inner layer (12) to absorb impact energies and to eliminate mechanical vibrations and acoustic noises. The second polymeric material has a dampening factor of at least 0.05 and a flexural modulus of less than 50 MPa. The second polymeric material is a multi-phase polymer having at least one polymer …
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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 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2020.
- 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.