US3781209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing homogeneous rods of semiconductor material
Assignee: Siemens AG
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Filing: 1971-12-02
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Granted: 1973-12-25
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Expires: 1991-12-02
Abstract
Abstract A PERPENDICULAR TUBE OF SEMICONDUCTOR MATERIAL IS FILLED WITH CRYSTALLINE SEMICONDUCTOR WASTE AND/OR DOPANT. A MOLTEN ZONE IS GUIDED THROUGH THE TUBE AND THE FILLING, WHEREBY THE FILLING FUSES WITH THE TUBE.
Inventors
- 👤 K Reuschel
- 👤 W Dietze
- 👤 A Muhlbauer
- 👤 H Sandmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:50
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/08; C30B13/10; Y; Y10; Y10S; Y10S117/00; Y10S117/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |