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Expired Canadian patentCanada

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CA 864257 A · Owner: The Government Of The United States Of America As Represented By The Sretary Of The Army · Inventors: Calvin W. Fowler

CIPO record

Overview

Drawings and full text

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

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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 23, 1971. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 1988.
  • 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 23, 1971
Term endedFebruary 23, 1988
Patent numberCA 864257 A
Classification (IPC)F42B5/02

Timeline

Timeline From CIPO dates

197219741976197819801982198419861988Patent grantedFeb 23, 1971Term endedFeb 23, 1988

Sources & verification

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