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Expired Canadian patentCanada

A dispersive precompensator for use in an electromagnetic radiation generation and detection system

CA 2350065 C · Owner: Rudd, James V. · Inventors: Rudd, James V.

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Abstract From the Canadian patent

An electromagnetic radiation emitter (12) which utilizes a precompensator (14), pulsed light signal, optical fiber cable (18) and a terahertz radiation , generator (16). The present invention incorporates an optical precompensator (14) to correct for the stretching of an optical signal as it travels through an optical fiber cable (18). The dispersion characteristics of the precompensator (14) will be equal and opposite to the dispersion characteristics of the optical fiber cable maintaining the fidelity of , optical pulses as they travel through and exit the optical fiber cable (18) striking a device that generates terahertz electromagnetic radiation (16).

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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

  • Filed March 26, 1999 and granted January 11, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2021.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 26, 1999
GrantedJanuary 11, 2011
Term endedMarch 26, 2019
Patent numberCA 2350065 C
Classification (IPC)G02B6/34

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedMarch 26, 1999Patent grantedJan 11, 2011Term endedMarch 26, 2019

Sources & verification

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