US3216805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for crucible-free zone melting
Assignee: Siemens Schuckertwerke AG
•
Filing: 1961-10-26
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Granted: 1965-11-09
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Expires: 1981-10-26
Abstract
No abstract record available.
Inventors
- 👤 Emeis Reimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:40
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/28; C30B13/16; C30B13/26; C30B13/32; C30B15/00; C30B15/002; C30B15/02; C30B15/30; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10S117/91; Y10S117/917; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1036; Y10T117/1076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
APPARATUS FOR CRUCIBLE-FREE ZONE MELTING OF RODSHAPED CRYSTALLINE MATERIAL, COMPRISING A GAS-TIGHT VACUUM ENCLOSURE MEMBER HAVING MEANS FOR CONNECTION WITH A VACUUM PUMP, AXIALLY SPACED HOLDERS IN SAID VESSEL FOR SECURING THE ROD MATERIAL BETWEEN THEM, ANNULAR ELECTRIC HEATING MEANS IN SAID VESSEL AXIALLY SURROUNDING THE ROD-SHAPED MATERIAL, MEANS FOR DISPLACING SAID HEATING MEANS ALONG SAID AXIS FOR ZONE MELTING THE ROD-SHAPED MATERIAL, MEANS FOR SUPPLYING CURRENT TO SAID ELECTRIC HEATING MEANS, THE IMPROVEMENT WHICH COMPRISES THE ENCLOSURE MEMBER PROVIDING AN ENCLOSURE CHAMBER HAVING AN INNER WIDTH WHICH IS A MULTIPLE OF THE DIAMETER
Claim 2
Dependent Claim
94 words
APPARATUS FOR CRUCIBLE-FREE ZONE MELTING OF RODSHAPED CRYSTALLINE MATERIAL, COMPRISING A GAS-TIGHT VACUUM ENCLOSURE MEMBER HAVING MEANS FOR CONNECTION WITH A VACUUM PUMP, AXIALLY SPACED HOLDERS IN SAID VESSEL FOR SECURING THE ROD MATERIAL BETWEEN THEM, ANNULAR ELECTRIC HEATING MEANS IN SAID VESSEL AXIALLY SURROUNDING THE ROD-SHAPED MATERIAL, MEANS FOR DISPLACING SAID HEATING MEANS ALONG SAID AXIS FOR ZONE MELTING THE ROD-SHAPED MATERIAL, MEANS FOR SUPPLYING CURRENT TO SAID ELECTRIC HEATING MEANS, THE IMPROVEMENT WHICH COMPRISES THE ENCLOSURE MEMBER PROVIDING AN ENCLOSURE CHAMBER HAVING AN INNER WIDTH WHICH IS A MULTIPLE OF THE DIAMETER
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |