US1995497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current interruption indicator for electric clocks, etc.
Assignee: E INGRAHAM Co
•
Filing: 1931-04-21
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Granted: 1935-03-26
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Expires: 1951-04-21
Abstract
No abstract record available.
Inventors
- 👤 Elof L Carlson
- 👤 Arthur B Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:09
CPC Classifications
G; G04; G04C; G04C15/00; G04C15/0009; G04C15/0036
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) | 1938-03-25 | 1938-09-24 | 1939-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-25 | 1942-09-24 | 1943-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-25 | 1946-09-24 | 1947-03-26 | $7700.00 | Window Closed / Lapsed |