Expendable underwater vehicle
CA 2215034 C · Owner: Sippican, Inc. · Inventors: Chace, Raymond A. Jr.; Manning, Mark C.
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 anti-submarine warfare in ocean waters is between about three to five feet in length and about five inches in diameter and it includes various improvements which make successful operation in the ocean waters possible. The improvements include an in-water variable speed feature a variable tonal levels feature, an autonomous evasion feature, and a high-power integrated pinger feature. One or more of these features can be combined to provide an extremely effective and versatile expendable underwater training vehicle.
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 January 5, 1996 and granted May 8, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 2018.
- 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.