US2415841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conducting material and device and method of making them
Assignee: AT&T Inc
•
Filing: 1944-12-14
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Granted: 1947-02-18
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Expires: 1964-12-14
Abstract
No abstract record available.
Inventors
- 👤 Russell S Ohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:14
CPC Classifications
H; H10; H10P; H10P95/00; B; B28; B28B; B28B7/00; B28B7/0097; B28B7/36; B28B7/366; B30; B30B; B30B15/00; B30B15/02; H10D; H10D99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB551209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-17 | 1950-08-19 | 1951-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-17 | 1954-08-19 | 1955-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-17 | 1958-08-19 | 1959-02-18 | $7700.00 | Window Closed / Lapsed |