US2947943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trouble detector
Assignee: Monroe Calculating Machine Co
•
Filing: 1957-08-01
•
Granted: 1960-08-02
•
Expires: 1977-08-01
Abstract
No abstract record available.
Inventors
- 👤 Robert F Casey
- 👤 Gibbon John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:00
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1561225A
Cited
US2756409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |