US3260573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zone melting gallium in a recycling arsenic atmosphere
Assignee: Siemens Schuckertwerke AG
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Filing: 1963-06-26
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Granted: 1966-07-12
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Expires: 1983-06-26
Abstract
No abstract record available.
Inventors
- 👤 Ziegler Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
C; C30; C30B; C30B13/00; C30B29/00; C30B29/10; C30B29/40; C30B29/42; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10S117/906; Y10S117/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE METHOD OF PURIFYING SEMICONDUCTOR ARSENIDES BY ZONE MELTING, WHICH COMPRISES SUBJECTING AN ARSENIDE ROD TO FLOATING ZONE MELTING IN A VESSEL, PASSING DURING ZONE MELTING A CURRENT OF INERT CARRIER GAS THROUGH THE VESSEL AND PAST THE MOLTEN ZONE, AND CHARGING THE CARRIER GAS CURRENT AHEAD OF THE MOLTEN ZONE WITH ARSENIC VAPOR TO AN ARSENIC PARTIAL PRESSURE CORRESPONDING SUBSTANTIALLY TO THE ARSENIC PARTIAL PRESSURE OBTAINING ABOVE THE ARSENIDE AT THE MELTING TEMPERATURE BY PASSING THE INCOMING CARRIER GAS CONTINOUSLY THRU THE ARSENIC VAPOR SOURCE, AND FOLLOWING THE PASSAGE OF THE CARRIER GAS OVER THE MELTING ZONE, CONDENSING THE ARSENIC FROM THE CARRIER GAS IN A COOLING ZONE.
Claim 2
Independent Claim
109 words
THE METHOD OF PURIFYING SEMICONDUCTOR ARSENIDES BY ZONE MELTING, WHICH COMPRISES SUBJECTING AN ARSENIDE ROD TO FLOATING ZONE MELTING IN A VESSEL, PASSING DURING ZONE MELTING A CURRENT OF INERT CARRIER GAS THROUGH THE VESSEL AND PAST THE MOLTEN ZONE, AND CHARGING THE CARRIER GAS CURRENT AHEAD OF THE MOLTEN ZONE WITH ARSENIC VAPOR TO AN ARSENIC PARTIAL PRESSURE CORRESPONDING SUBSTANTIALLY TO THE ARSENIC PARTIAL PRESSURE OBTAINING ABOVE THE ARSENIDE AT THE MELTING TEMPERATURE BY PASSING THE INCOMING CARRIER GAS CONTINOUSLY THRU THE ARSENIC VAPOR SOURCE, AND FOLLOWING THE PASSAGE OF THE CARRIER GAS OVER THE MELTING ZONE, CONDENSING THE ARSENIC FROM THE CARRIER GAS IN A COOLING ZONE.
References Cited (Backward Citations)
US3077384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |