US3585008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Advance melt zone production of a monocrystalline rod
Assignee: Siemens AG
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Filing: 1967-09-22
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Granted: 1971-06-15
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Expires: 1987-09-22
Abstract
Abstract METHOD OF CRUCIBLE-FREE ZONE MELTING A CRYSTALLINE ROD WHICH COMPRISES SUCCESSIVELY PASSING ALONG THE ROD IN THE AXIAL DIRECTION THEREOF AN ADVANCE MELTING ZONE FORMED IN THE ROD TO A DEPTH SMALLER THAN THE RADIAL THICKNESS OF THE ROD AND A SUBSEQUENT MELTING ZONE FORMED IN THE ROD AND EXTENDING ACROSS THE ENTIRE CROSS SECTION OF THE ROD.
Inventors
- 👤 Wolfgang Keller
- 👤 Herbert Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:11
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/16; C30B13/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
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 |