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Expired Canadian patentCanada

Color selectable source for pulsed arc discharge lamps

CA 1310057 C · Owner: Rothwell, Harold L. Jr. · Inventors: Rothwell, Harold L. Jr.; Grant, Jeffrey O.

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

The present invention is directed to a novel system for producing selectable color bands from a single emission source. More particularly, this invention is directed to a small emission source consisting of a gas discharge means and a technique for activating this discharge means. The emission source in the present invention is preferably a single-ended fused silica capsule which encloses one or more predetermined metal halide salts and an inert gas, preferably argon gas.

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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 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.
FiledDecember 16, 1988
GrantedNovember 10, 1992
Term endedNovember 10, 2009
Patent numberCA 1310057 C
Classification (IPC)H01J61/38 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedDec 16, 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.