Environmentally compatible archway for road building
CA 2328096 C · Owner: Nybo, Barry C. · Inventors: Nybo, Barry C.; Semotiuk, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a novel archway apparatus which is useful for building access roads such as logging roads and secondary roads in wilderness areas that include waterways such as streams and creeks while causing little or not impact to sensitive environment. An environmentally compatible archway module for culvert construction comprising: (a) a curved body; (b) a first flange on a first end of the body; (c) a second flange on a second end of the body; (d) a first footing contact area at the base of a first side of the body; (e) a second footing contact area at the base of a second side of the body; and (f) a reinforcing member in a region of the body between the first flange and the …
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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 December 13, 2000 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 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.