Flat boat and framework for supporting canvas
CA 2087213 A1 · Owner: Akatsuka, Tsuneo · Inventors: Moriguchi, Kazutomo; Akatsuka, Tsuneo; Watanabe, Kikuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A small collapsible canoe is disclosed which includes a canvas stretched over a knockdown frame formed from fiberreinforced plastic pipes each containing a synthetic fiber selected from a polyester fiber, a polyamide fiber a, polyethylene fiber, a vinylon fiber and an aramide fiber as a reinforcing fiber. Each of the pipes has a specific gravity of 1.5 or less, a bending modulus of elasticity of at least 40 ton/cm2, an IZOD impact strength of at least 80 kg?cm and a duPont impact strength of at least 0.2 kg x 500 mm.
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 January 13, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2015.
- 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.