US2166058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequence operation control and interlock system
Assignee: Railway & Industrial Eng Co
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Filing: 1933-10-06
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Granted: 1939-07-11
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Expires: 1953-10-06
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:11
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/46; H01H33/52; Y; Y10; Y10T; Y10T70/00; Y10T70/60; Y10T70/625; Y10T70/675; Y10T70/80; Y10T70/8027; Y10T70/827
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) | 1942-07-10 | 1943-01-09 | 1943-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-10 | 1947-01-09 | 1947-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-10 | 1951-01-09 | 1951-07-11 | $7700.00 | Window Closed / Lapsed |