Patent US569997A successfully refreshed from Google Patents.
US1024587A
Expired / Lapsed
US
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Electric-circuit-controlling apparatus.
Assignee: Hall Signal Co
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Filing: 1911-12-19
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Granted: 1912-04-30
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Expires: 1931-12-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Lee Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:09
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/06
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) | 1915-04-30 | 1915-10-30 | 1916-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-04-30 | 1919-10-30 | 1920-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-04-30 | 1923-10-30 | 1924-04-30 | $7700.00 | Window Closed / Lapsed |