Asymmetrical sailing catamaran keels
CA 2131504 A1 · Owner: Johann, Parnigoni · Inventors: Johann, Parnigoni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention consists of two asymmetrical hulls connected by a crossbeam or deck structure to make up a catamaran. Each hull has a rounded or shallow angled outer surface below the water line. The inboard side presents a vertical, or near vertical surface below the water line to act as an effective leeway preventer, to resist sideways movement under normal sailing conditions. The vertical surface may have a winglet at the keel and a flow directing vane to prevent vortexes and to maintain parallel flow of water along the whole length of the surface.
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 September 6, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2016.
- 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.