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Expired Canadian patentCanada

Power-actuated underwater tool

CA 833804 A · Owner: Olin Corporation · Inventors: Richard G. Lawson; Robert W. Henning; Oliver N. Lewis

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

No Claude kit for weapons

Claude doesn't help design weapons, ammunition or explosives, so this page has no Reinvent kit. To develop this one, work with a federally licensed manufacturer (many of these items are regulated) and a registered patent attorney or agent, listed on the USPTO roster.

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

  • Granted February 10, 1970. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 10, 1987.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 10, 1970
Term endedFebruary 10, 1987
Patent numberCA 833804 A
Classification (IPC)B25C1/08 +2 more

Timeline

Timeline From CIPO dates

197119731975197719791981198319851987Patent grantedFeb 10, 1970Term endedFeb 10, 1987

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.