US1360740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of distortion of signaling-currents
Assignee: AT&T Inc
•
Filing: 1917-09-08
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Granted: 1920-11-30
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Expires: 1937-09-08
Abstract
No abstract record available.
Inventors
- 👤 Ralph V L Hartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:40
CPC Classifications
H; H03; H03G; H03G5/00; H03G5/02; H03G5/04; H03G5/06; H03C; H03C1/00
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) | 1923-11-30 | 1924-05-31 | 1924-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-11-30 | 1928-05-31 | 1928-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-11-30 | 1932-05-31 | 1932-11-30 | $7700.00 | Window Closed / Lapsed |