Nonlinear optical silica material and nonlinear optical device
CA 2277805 C · Owner: Toyota Jidosha Kabushiki Kaisha · Inventors: Nakamura, Naoki; Nagashima, Tomonori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nonlinear optical silica material mainly consisting of SiO2-GeO2 to which hydrogen or halogen element X is added. Oxygen bonded to Ge contained in the nonlinear optical silica material is replaced by H or X, and one Ge has two Ge-O bonds and one Ge-H (or Ge-X) bond at Ge points where nonlinearity is exhibited in the silica material. The Ge-H (or Ge-X) bond does not relate to a crystal network, so that when the polarity is oriented in order to exhibit nonlinearity at Ge~, an electric field to be applied can be lowered, and when a optical semiconductor hybrid element or the like is produced, other portions of the semiconductor elements can be prevented from being broken or degraded in …
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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 July 12, 1999 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 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.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.