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Expired Canadian patentCanada

Optical packet router using multiple wavelength labels, and optical packet network that uses multiple wavelength labels

CA 2568209 C · Owner: Harai, Hiroaki · Inventors: Kubota, Fumito; Harai, Hiroaki; Chujo, Wataru

CIPO record

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Abstract From the Canadian patent

The invention describes an optical packet router using multiple wavelength labels comprising means for separating data signals from address signals in which means said address signals are identified by wavelength information delimited by a predetermined waveband width and predetermined time differential information included in optical packets; means for demodulating address information delimited by the wavelength information from the address signals to obtain demodulated address information; means for switching an optical switch in accordance with the demodulated address information; and selection means that uses the optical switch to select an optical path for the data signals.

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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 30, 2001 and granted October 15, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2023.
  • 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 30, 2001
GrantedOctober 15, 2013
Term endedMarch 30, 2021
Patent numberCA 2568209 C
Classification (IPC)H04J14/02 +2 more

Timeline

Timeline From CIPO dates

2002200420062008201020122014201620182020Application filedMarch 30, 2001Patent grantedOct 15, 2013Term endedMarch 30, 2021

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