Environmentally compatible pole and piling
CA 2377933 A1 · Owner: Hopper Industries, Inc. · Inventors: Parker, Larmon; Hopper, Leon B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An elongated support structure (50, 193 193a, 193b, 193c, 193d, 193e, 218) , suitable for outdoor use as a utility pole post, or piling and having a , multiple layered composite construction, and a method for manufacturing such an elongated support structure (50, 193 193a, 193b, 193c, 193d, 193e, 218). , The elongated support structure (50 193, 193a, 193b, 193c, 193d, 193e, 218) includes a hollow core (68, 194, 194a, 194b 204, 210) formed of a homogeneous , mixture of a matrix resin and a fibrous strenghtening material. The core (68 194, 194a, 194b, 204, 210) is surrounded by a reinforcing layer (72 206, 212) , of fiberglass and a binding resin. An expanded foam resin layer (74 207, 209, …
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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 June 30, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 30, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 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.