US3584676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of single crystals
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1969-08-11
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Granted: 1971-06-15
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Expires: 1989-08-11
Abstract
Abstract The molten substance is poured into a cluster of moulds having their lower ends connected to a feeding funnel. The cluster is slowly lifted out of a liquid whose temperature is higher than the melting point: as a result the isothermal planes in the substance are strictly horizontal, undistorted and at the same level in all moulds.
Inventors
- 👤 Francis Busquet
- 👤 Francis Forrat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:29
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/003; C30B11/007
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
A method for the manufacture of single crystals of a substance, according to which the substance is melted, wherein the melted substance is subjected to hydrostatic pressure in a mould of high thermal conductivity closed at the top, the mould is immersed in a bath of molten material kept at a determined temperature higher than the melting point of the substance, and the single crystal is grown by gradually raising the mould from the bath to cause the growth of the single crystal from the top end of the mould downward.
Claim 2
Independent Claim
91 words
A method for the manufacture of single crystals of a substance, according to which the substance is melted, wherein the melted substance is subjected to hydrostatic pressure in a mould of high thermal conductivity closed at the top, the mould is immersed in a bath of molten material kept at a determined temperature higher than the melting point of the substance, and the single crystal is grown by gradually raising the mould from the bath to cause the growth of the single crystal from the top end of the mould downward.
Claim 3
Independent Claim
60 words
A method as claimed in claim l, for the simultaneous manufacture of several single crystals of the substance, according to which the molten substance is placed in a cluster of moulds whose bottom ends are connected to the same channel in which the level of the free surface of the substance is higher than the top points of the moulds.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |