US688184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic monitor for telephone-exchanges.
Assignee: Individual
•
Filing: 1900-09-01
•
Granted: 1901-12-03
•
Expires: 1920-09-01
Abstract
No abstract record available.
Inventors
- 👤 James B Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:12
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/50; H04N1/506; G; G01; G01D; G01D15/00; G01D15/28; G01D15/30
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) | 1904-12-02 | 1905-06-03 | 1905-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-12-02 | 1909-06-03 | 1909-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-12-02 | 1913-06-03 | 1913-12-03 | $7700.00 | Window Closed / Lapsed |