Near infrared absorption composition
CA 2290076 A1 · Owner: Hasegawa, Shun · Inventors: Masuda, Gen; Hasegawa, Shun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a near infrared absorption composition containing, in a resin a dithiol-nickel, complex represented by the following formula (1): The near infrared absorption composition has alleviated the problems of the prior art; absorbs the near infrared light emitted from, for example, a display device and is therefore used suitably as a near infrared absorption filter capable of preventing the malfunctioning of electronic appliances placed near the filter; further, has a high transmittance for visible light and high absorbance for near infrared light and is therefore used suitably as a near infrared absorption filter particularly for plasma display panel.
Read the whole patent
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 November 16, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 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.