Curable organopolysiloxane resin composition for optical waveguides, optical waveguide, and fabrication process thereof
CA 2521736 C · Owner: Takeuchi, Kikuko · Inventors: Takeuchi, Kikuko; Ogawa, Takuya; Kushibiki, Nobuo
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 hydrosilation-curable organopolysiloxane resin composition comprising (A) an organopolysiloxane resin having three or more monovalent unsaturated aliphatic hydrocarbon groups and aromatic hydrocarbon groups, (B) an organosilicon compound having two or more siliconbonded hydrogen atoms and aromatic hydrocarbon groups (C) a hydrosilation , catalyst, and optionally (D) (d1) a solvent or (d2) a hydrosilation -reactive organosiloxane-based diluent, for optical transmission components especially , for optical transmission components serving as optical communication elements relates to optical transmission components represented by optical waveguides, …
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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 April 7, 2004 and granted July 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2026.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.