Crystal growing method and crystal growing apparatus
CA 2344518 A1 · Owner: Sumitomo Metal Industries, Ltd. · Inventors: Sanjoh, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A crystal growing apparatus comprises a solid-state device (22) having a region (22a) where valence electrons are so controlled that the density of holes or electrons in the surface portion is controlled according to the environment of a solution (23) containing a polymer compound and a heatgenerating device (24) disposed near the region (22a). The region (22a) is an impurity region formed on a silicon semiconductor substrate. The heatgenerating device (24) includes a Cr heating wire. A crystal growing method comprises heating a solution (23) by means of a heat-generating device (24). A crystal of a polymer compound is grown in the heated solution (23) in an electric state given to …
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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 August 11, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 11, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2021.
- 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.