Expendable underwater vehicle
CA 2202980 C · Owner: Kelly, Patrick J. · Inventors: Couture, John R.; Gallagher, Brian J.; Kelly, Patrick J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
An expendable underwater vehicle for use in training naval forces in antisubmarine warfare in ocean waters, including shallow waters is between about , three to five feet in length and about five inches in diameter and it , includes various improvements which make successful operations in shallow ocean waters, and improved operation in all ocean waters possible. The , improvements include a one-piece nose cup which allows the expendable underwater vehicle to be air launched into shallow water a scuttle plug which , allows water to fill the expendable underwater vehicle after the vehicle is expended and drops to the bottom of the ocean and rudders and elevators of , increased surface area …
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.
Why it's free to use
- Filed June 6, 1995 and granted December 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 6, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2017.
- 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.