Patent US755840A successfully refreshed from Google Patents.
US755840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector for electrical disturbances.
Assignee: Individual
•
Filing: 1901-09-30
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Granted: 1904-03-29
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Expires: 1921-09-30
Abstract
No abstract record available.
Inventors
- 👤 Jagadis Chunder Bose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:58
CPC Classifications
H; H10; H10D; H10D99/00
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) | 1907-03-29 | 1907-09-28 | 1908-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-03-29 | 1911-09-28 | 1912-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-03-29 | 1915-09-28 | 1916-03-29 | $7700.00 | Window Closed / Lapsed |