Patent US3304157A successfully refreshed from Google Patents.
Patent US3160476A successfully refreshed from Google Patents.
US3160476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing compact boron, particularly in monocrystalline form
Assignee: Siemens and Halske AG
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Filing: 1962-03-05
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Granted: 1964-12-08
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Sirtl Erhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:22
CPC Classifications
C; C30; C30B; C30B25/00; C01; C01B; C01B35/00; C01B35/02; C01B35/023; C23; C23C; C23C16/00; C23C16/22; C23C16/28; C30B25/02; C30B29/00; C30B29/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE PROCESS OF PRODUCING CRYSTALLINE HYPERPURE BORON, WHICH COMPRISES PYROLYTICALLY PREPICPTATING BORON ONTO A HEATED BORAN CARRIER BODY AT A SELECTED PRECIPITATION TEMPERATURE BY CONTACTING THE CARRIER BODY WITH A FLOW OF REACTION GASES CONTAINING A GASEOUS HALOGEN COMPOUND OF BORON TO BE PYROLYTICALLY REDUCED AND PRECIPITATED; AND ADDING TO THE REACTION GASES, PRIOR TO CONTACTING THEM WITH THE CARRIER BODY, A HYDROGEN-HALOGEN COMPOUND IN A QUANTITY AT WHICH THE EQUILBRIUM TEMPERATURE OF COMMENCING BORON REDISSOLUTION BY THE REACTION GASES IS AT MOST 200*C. BELOW SAID PRECIPITATION THEMPERATURE, THE BORON PRECIPITATION BEING COMPLETELY STOPPED BELOW SAID EQUILIBRIUM TEMPERATURE.
Claim 2
Dependent Claim
98 words
THE PROCESS OF PRODUCING CRYSTALLINE HYPERPURE BORON, WHICH COMPRISES PYROLYTICALLY PREPICPTATING BORON ONTO A HEATED BORAN CARRIER BODY AT A SELECTED PRECIPITATION TEMPERATURE BY CONTACTING THE CARRIER BODY WITH A FLOW OF REACTION GASES CONTAINING A GASEOUS HALOGEN COMPOUND OF BORON TO BE PYROLYTICALLY REDUCED AND PRECIPITATED; AND ADDING TO THE REACTION GASES, PRIOR TO CONTACTING THEM WITH THE CARRIER BODY, A HYDROGEN-HALOGEN COMPOUND IN A QUANTITY AT WHICH THE EQUILBRIUM TEMPERATURE OF COMMENCING BORON REDISSOLUTION BY THE REACTION GASES IS AT MOST 200*C. BELOW SAID PRECIPITATION THEMPERATURE, THE BORON PRECIPITATION BEING COMPLETELY STOPPED BELOW SAID EQUILIBRIUM TEMPERATURE.
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) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |