Optical switch and method of making the same
CA 2299832 C · Owner: Mori, Keiichi · Inventors: Kato, Yoshichika; Mori, Keiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical switch a conductive silicon substrate is coated all over the surface area with a silicon film to form in parallel to the substrate surface a, movable contact and elastic support portions for coupling the movable electrode and for elastically supporting its movable electrode in a manner to be displaced vertically, the surface region of the conductive silicon substrate, facing the movable electrode and the elastic support portions is etched away to form therein a low-floor portion as a fixed electrode surface opposite the movable electrode in parallel thereto, and a micro mirror having a vertical reflecting surface is mounted on the movable electrode portion.
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 March 2, 2000 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 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.