Method for producing article having predetermined surface shape, and optical waveguide element
CA 2350825 A1 · Owner: Nippon Sheet Glass Co. Ltd. · Inventors: Hori, Masahiro; Nakamura, Koichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing an article having a predetermined finely concave-convex surface shape wherein a sol-gel material in the form of a film is arranged between a substrate and a mold and then is heated to thereby form, on surface , of the substrate a gelled film having a surface shape obtained by reversing the shape of the mold, characterized in that the sol-gel material comprises a dialkyldialkoxy(or dihalogeno)silane and/or a (substituted)aryltrialkoxy(or trihalogeno)silane, and a fluoroalkyltrialkoxy(or trihalogeno)silane. The method can be employed for producing an article having a predetermined shape which is excellent in thermal resistance chemical resistance and dimensional …
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 September 12, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 12, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 12, 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
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.