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Expired Canadian patentCanada

Pneumatic projectile discharger for muzzle-loading firearms

CA 1309809 C · Owner: Pollock, Harold R. Jr. · Inventors: Pollock, Harold R. Jr.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Patent, ABSTRACT, A pneumatic projectile discharging device uses cylinders of compressed gas for unloading or removing obstructions from the barrel of muzzle-loading guns. The device includes a valve body, a hollow handle piece an, adapter and a plurality of actuators which allow the device to be used on various types of guns. One end of the valve body is equipped with means for providing an airtight seal with the cylinder and means for piercing the end of the cylinder to release the gas. The cylinder of compressed gas is enclosed by the hollow handle piece which is detachably connected to the valve body and is provided with means for advancing the cylinder causing the end thereof to be …

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 November 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 10, 1988
GrantedNovember 10, 1992
Term endedNovember 10, 2009
Patent numberCA 1309809 C
Classification (IPC)F41C27/00 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedNov 10, 1988Patent grantedNov 10, 1992Term endedNov 10, 2009

Sources & verification

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