Patent US2524051A successfully refreshed from Google Patents.
US2683676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of germanium rods having longitudinal crystal boundaries
Assignee: AT&T Inc
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Filing: 1950-01-13
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Granted: 1954-07-13
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Expires: 1970-01-13
Abstract
No abstract record available.
Inventors
- 👤 John B Little
- 👤 Gordon K Teal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:25
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/20; C30B15/22; C30B15/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE METHOD OF PREPARING A ROD OF GERMANIUM COMPOSED OF A PLURALITY OF CRYSTALS OF DIFFERENT ORIENTATIONS WITH INTERVENING LONGITUDINAL BOUNDARIES WHICH COMPRISES PLACING A MASS OF GERMANIUM IN AN INERT ATMOSPHERE, REPLACING THE INERT ATMOSPHERE WITH A FLOW OF A REDUCING ATMOSPHERE, MELTING THE MASS IN THE REDUCING ATMOSPHERE, MAINTAINING THE MELT AT A TEMPERATURE ABOVE THE MELTING POINT, PLACING A PLURALITY OF SEED CRYSTALS OF GERMANIUM HAVING DIFFERENT CRYSTALLINE ORIENTATIONS IN LONGITUDINAL CONTACT WITH EACH OTHER, PLACING THE ADJOINED SEED CRYSTALS IN IMMERSED CONTACT WITH
Claim 2
Independent Claim
87 words
THE METHOD OF PREPARING A ROD OF GERMANIUM COMPOSED OF A PLURALITY OF CRYSTALS OF DIFFERENT ORIENTATIONS WITH INTERVENING LONGITUDINAL BOUNDARIES WHICH COMPRISES PLACING A MASS OF GERMANIUM IN AN INERT ATMOSPHERE, REPLACING THE INERT ATMOSPHERE WITH A FLOW OF A REDUCING ATMOSPHERE, MELTING THE MASS IN THE REDUCING ATMOSPHERE, MAINTAINING THE MELT AT A TEMPERATURE ABOVE THE MELTING POINT, PLACING A PLURALITY OF SEED CRYSTALS OF GERMANIUM HAVING DIFFERENT CRYSTALLINE ORIENTATIONS IN LONGITUDINAL CONTACT WITH EACH OTHER, PLACING THE ADJOINED SEED CRYSTALS IN IMMERSED CONTACT WITH
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) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |