US2933384A
Expired / Lapsed
US
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Method of melting compounds without decomposition
Assignee: Siemens Schuckertwerke AG
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Filing: 1954-09-15
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Granted: 1960-04-19
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Expires: 1974-09-15
Abstract
No abstract record available.
Inventors
- 👤 Welker Heinrich
- 👤 Folberth Otto
- 👤 Gremmelmaier Rolf
- 👤 Grimm Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:55
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/40; C30B11/00; Y; Y10; Y10S; Y10S117/00; Y10S117/906; Y10S117/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
THE METHOD OF MELTING WITH MINIMIZED DECOMPOSITION A COMPOUND WHICH EXHIBITS SUBSTANTIALLY DIFFERENT PARTIAL VAPOR PRESSURES OF ITS COMPONENTS AT THE MELTING POINT, THE VAPOR PRESSURE OF ONE OF THE COMPONENTS OF THE MELT BEING SUFFICIENTLY HIGH SO AS TO SUBSTANTIALLY EFFECT THE COMPOSITION OF THE MELT BECAUSE OF LOSS BY VAPORIZATION OF SAID COMPONENT, THEREBY ORDINARILY CAUSING A CHANGE IN THE RATIO OF THE COMPONENTS OF THE COMPOUND, AND PULLING A SINGLE CRYSTAL FROM THE MELT, SAID METHOD COMPRISING PLACING THE COMPOUND INTO A MELTING VESSEL PROVIDING A VAPOR SPACE ABOUT THE COMPOUND, HEATING A PART OF SAID MELTING VESSEL CLOSEST TO SAID COMPOUND TO A TEMPERATURE CAUSING THE COMPOUND TO MELT, HEATING THE OTHER PARTS OF SAID MELTING VESSEL EXPOSED TO THE VAPOR FROM THE MELT TO A TEMPREATURE BELOW THE MELTING TEMPERATURE OF THE COMPOUND, BUT ABOVE THE CONDENSATION OF TEMPERATURE OF THE COMPONENT HAVING THE HIGHEST PARTIAL VAPOR PRESSURE ABOVE THE MELT OF THE COMPOUND, SAID SPACE BEING AT LEAST SUFFICIENTLY ENCLOSED TO PREVENT EGRESS OF COMPONENT VAPOR, AND PULLING A CRYSTAL FROM THE MELT.
Claim 2
Independent Claim
179 words
THE METHOD OF MELTING WITH MINIMIZED DECOMPOSITION A COMPOUND WHICH EXHIBITS SUBSTANTIALLY DIFFERENT PARTIAL VAPOR PRESSURES OF ITS COMPONENTS AT THE MELTING POINT, THE VAPOR PRESSURE OF ONE OF THE COMPONENTS OF THE MELT BEING SUFFICIENTLY HIGH SO AS TO SUBSTANTIALLY EFFECT THE COMPOSITION OF THE MELT BECAUSE OF LOSS BY VAPORIZATION OF SAID COMPONENT, THEREBY ORDINARILY CAUSING A CHANGE IN THE RATIO OF THE COMPONENTS OF THE COMPOUND, AND PULLING A SINGLE CRYSTAL FROM THE MELT, SAID METHOD COMPRISING PLACING THE COMPOUND INTO A MELTING VESSEL PROVIDING A VAPOR SPACE ABOUT THE COMPOUND, HEATING A PART OF SAID MELTING VESSEL CLOSEST TO SAID COMPOUND TO A TEMPERATURE CAUSING THE COMPOUND TO MELT, HEATING THE OTHER PARTS OF SAID MELTING VESSEL EXPOSED TO THE VAPOR FROM THE MELT TO A TEMPREATURE BELOW THE MELTING TEMPERATURE OF THE COMPOUND, BUT ABOVE THE CONDENSATION OF TEMPERATURE OF THE COMPONENT HAVING THE HIGHEST PARTIAL VAPOR PRESSURE ABOVE THE MELT OF THE COMPOUND, SAID SPACE BEING AT LEAST SUFFICIENTLY ENCLOSED TO PREVENT EGRESS OF COMPONENT VAPOR, AND PULLING A CRYSTAL FROM THE MELT.
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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |