US756676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave-responsive device.
Assignee: INTERNATIONAL WIRELESS TELEGRAPH Co
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Filing: 1902-11-10
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Granted: 1904-04-05
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Expires: 1922-11-10
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Midgley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
H; H10; H10D; H10D99/00; H10D64/00; H10D64/20; H10D64/23; H10W; H10W76/00; H10W76/01; H10W76/05; H10W76/40; H10W76/42; H10W76/48
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) | 1907-04-05 | 1907-10-05 | 1908-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-04-05 | 1911-10-05 | 1912-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-04-05 | 1915-10-05 | 1916-04-05 | $7700.00 | Window Closed / Lapsed |