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Expired Canadian patentCanada

Metal cutting with high pressure coolant

CA 1302069 C · Owner: Derosier, William M. · Inventors: Parker, Frederick D.; Derosier, William M.

CIPO record

Overview

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

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Abstract From the Canadian patent

18-, Metal Cutting With High Pressure Coolant Abstract, Liquid coolant is directed across the rake surface of a tool bit while machining a material which tends to form a continuous chip. The pressure and volume are sufficient to impact the chip and break it up into small fragments. Pressures of 1400 kPa (200 psi) and higher are used while machining titanium and nickel alloys.

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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, and the Claude kit works from them.

Why it's free to use

  • Granted June 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 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.
FiledAugust 17, 1988
GrantedJune 2, 1992
Term endedJune 2, 2009
Patent numberCA 1302069 C
Classification (IPC)B23Q11/10

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedAug 17, 1988Patent grantedJune 2, 1992Term endedJune 2, 2009

Sources & verification

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