Photosensitive composition, and optical waveguide element and process for producing the same
CA 2360439 A1 · Owner: Nippon Sheet Glass Co. Ltd. · Inventors: Nakamura, Koichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A light-transmitting material which has high transparency in a wavelength region for use in communication, is excellent in properties such as heat resistance, water resistance, and chemical resistance can be easily made to , have a grating and can be easily incorporated into a module in practical use. The photosensitive composition, which gives the light-transmitting material comprises a silane compound or a product of the hydrolysis/dehydrating condensation thereof, a photoinitiator and water, the silane compound being , represented by the following formula (1): R1SiX13 wherein R1 is an organic group having a polymerizable carbon-carbon double bond and X1 is a hydrolyzable group or …
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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 November 10, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2022.
- 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
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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.