Wet-tip die for efg crystal growth apparatus
CA 2064748 A1 · Owner: Mobil Solar Energy Corporation · Inventors: Rajendran, Sankerlingam; Mackintosh, Brian H.; Harvey, David S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel capillary die and crystal growing method are provided for growing a hollow cristalline body by EFG. Inner and outer annular moats (114, 116) surround the die tip. Passageways (180) are provided for supplying melt (29) to those moats from a crucible (24), so that melt (29) in said moats will wet and cover the inner and outer exterior surfaces of the die tip during growth of a hollow crystalline body. The novel die may be constructed so as to have a lower die tip and a shorter capillary than EFG dies heretofore used to successfully grow hollow bodies. The die design facilitates keeping the temperature of the die tip substantially uniform about its circumference, thereby improving …
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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 May 20, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 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.