US2839741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicator lamp test circuit
Assignee: Individual
•
Filing: 1956-02-24
•
Granted: 1958-06-17
•
Expires: 1976-02-24
Abstract
No abstract record available.
Inventors
- 👤 Robert E Kratville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:52
CPC Classifications
G; G08; G08B; G08B29/00; G08B29/12; G08B29/126; G01; G01R; G01R31/00; G01R31/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |