Patent US5394183A successfully refreshed from Google Patents.
Patent US3391235A successfully refreshed from Google Patents.
US3391235A
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Apparatus for crucible-free zone melting with a vacuum chamber
Assignee: Siemens AG
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Filing: 1965-10-22
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Granted: 1968-07-02
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Emeis Reimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:53
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/32; H; H05; H05B; H05B6/00; H05B6/02; H05B6/22; H05B6/30; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
APPARATUS FOR CRUCIBLE-FREE ZONE MELTING ROD-SHAPED MATERIAL COMPRISING A VACUUM CHAMBER HAVING A SIDE WALL, HOLDING MEANS MOUNTED IN SAID CHAMBER FOR HOLDING THE ROD-SHAPED MATERIAL IN A SUBSTANTIALLY VERTICAL POSITION, HEATING MEANS LOCATED IN SAID CHAMBER FOR HEATING THE ROD-SHAPED MATERIAL TO FORM A MELTING ZONE THEREIN, THE SIDE WALL OF SAID CHAMBER BEING FORMED WITH A SUBSTANTIALLY VERTICALLY EXTENDING SLOT, A PLATE ADJACENT SAID SIDE WALL OUTSIDE OF SAID CHAMBER FOR COVERING AND HERMETICALLY SEALING SAID SLOT, SAID PLATE BEING DISPLACEABLE FROM OUTSIDE SAID CHAMBER IN A SUBSTANTIALLY VERTICAL DIRECTION, AND HOLDER MEANS FOR SAID HEATING MEANS EXTENDING FROM SAID CHAMBER THROUGH SAID SLOT AND SECURED TO SAID PLATE WHEREBY SAID HEATING MEANS MAY BE VERTICALLY DISPLACED WITH SAID PLATE FOR PASSING THE MOLTEN ZONE VERTICALLY THROUGH THE ROD-SHAPED MATERIAL.
Claim 2
Dependent Claim
132 words
APPARATUS FOR CRUCIBLE-FREE ZONE MELTING ROD-SHAPED MATERIAL COMPRISING A VACUUM CHAMBER HAVING A SIDE WALL, HOLDING MEANS MOUNTED IN SAID CHAMBER FOR HOLDING THE ROD-SHAPED MATERIAL IN A SUBSTANTIALLY VERTICAL POSITION, HEATING MEANS LOCATED IN SAID CHAMBER FOR HEATING THE ROD-SHAPED MATERIAL TO FORM A MELTING ZONE THEREIN, THE SIDE WALL OF SAID CHAMBER BEING FORMED WITH A SUBSTANTIALLY VERTICALLY EXTENDING SLOT, A PLATE ADJACENT SAID SIDE WALL OUTSIDE OF SAID CHAMBER FOR COVERING AND HERMETICALLY SEALING SAID SLOT, SAID PLATE BEING DISPLACEABLE FROM OUTSIDE SAID CHAMBER IN A SUBSTANTIALLY VERTICAL DIRECTION, AND HOLDER MEANS FOR SAID HEATING MEANS EXTENDING FROM SAID CHAMBER THROUGH SAID SLOT AND SECURED TO SAID PLATE WHEREBY SAID HEATING MEANS MAY BE VERTICALLY DISPLACED WITH SAID PLATE FOR PASSING THE MOLTEN ZONE VERTICALLY THROUGH THE ROD-SHAPED MATERIAL.
References Cited (Backward Citations)
US2937216A
Cited
US3270177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |