US2560792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic surface treatment of germanium
Assignee: AT&T Inc
•
Filing: 1948-02-26
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Granted: 1951-07-17
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Expires: 1968-02-26
Abstract
No abstract record available.
Inventors
- 👤 Robert B Gibney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:15
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/40; H10P14/46; H10P14/47; H10P14/6324
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1751362A
Cited
US2419561A
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US2356094A
Cited
US2438944A
Cited
US2447829A
Cited
US2476323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |