Fabrication methods for micromechanical elements
CA 2063769 C · Owner: Xerox Corporation · Inventors: Bol, Igor I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process in which concave surfaces to form undercut edges can be made and the application of such process to making micromechanical devices. Concave surfaces, forming undercut edges are are made in a wall of a stationary structure extending, from a planar surface by growing a convex bumper into the wall. The bumper forms, a convexo-concave relationship with the wall. The bumper is then removed from the, wall in such a manner as to preserve the concave undercut surface of the , wail. The, stationary structure and the planar surface is then further processed by coating with, a sacrificial layer, and a structural layer. The structural layer is patterned into a, movable structure that is …
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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 March 23, 1992 and granted November 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2014.
- 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.