US2081184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric circuit controller
Assignee: Leeds and Northrup Co
•
Filing: 1935-01-23
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Granted: 1937-05-25
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Expires: 1955-01-23
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Ross
- 👤 Seberhagen Sophie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:15
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/54; H01H19/56; H01H19/58
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) | 1940-05-24 | 1940-11-23 | 1941-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-05-24 | 1944-11-23 | 1945-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-05-24 | 1948-11-23 | 1949-05-25 | $7700.00 | Window Closed / Lapsed |