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Expired Canadian patentCanada

Second harmonic generation with 5-chloro-2-nitroaniline

CA 1299713 C · Owner: Stofko, John J. Jr. · Inventors: Leung, Peter C.W.; Stofko, John J. Jr.; Gerbi, Diana J.

CIPO record

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Abstract From the Canadian patent

42,497 CAN 4A, ABSTRACT, This invention is concerned with materials for nonlinear optical devices for the conversion of optical energy at one frequency to optical. energy at another frequency. Laser techniques have been developed to a great extent and it is possible to obtain various kinds of laser light by utilizing solid, gas, and liquid media. Laser light having various wavelengths is often desired and in some cases, a laser tight exhibiting a continuous spectrum over a certain range of wavelengths is desired. One means for converting coherent laser light of a fundamental frequency into laser light of a wavelength having a frequency twice the fundamental frequency (i.e. the second …

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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 April 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 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.
FiledJuly 12, 1988
GrantedApril 28, 1992
Term endedApril 28, 2009
Patent numberCA 1299713 C
Classification (IPC)G02F1/37 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJuly 12, 1988Patent grantedApril 28, 1992Term endedApril 28, 2009

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