Method of forming crystal
CA 2055400 C · Owner: Yamagata, Kenji · Inventors: Yamagata, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A crystal forming method comprises disposing on a surface of a substrate or in recessed portion formed in the substrate having a surface with a low nucleation density, primary seed having a sufficient small volume to singly aggregate and a rectangular prismatic or cubic shape in which all the sides and the bottom are surrounded by an insulator in contact therewith; performing heat treatment for aggregating the primary seed to form monocrystalline seed crystal having controlled plane orientation and in-plane orientation; and selectively growing monocrystal by crystal growth treatment using the seed crystal as starting point.
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 November 14, 1991 and granted August 4, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2013.
- 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.