US2285540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: Leeds and Northrup Co
•
Filing: 1939-07-01
•
Granted: 1942-06-09
•
Expires: 1959-07-01
Abstract
No abstract record available.
Inventors
- 👤 Irving M Stein
- 👤 Peters Jacob Clarence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:54
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; F; F15; F15C; F15C3/00; F15C3/10; F15C3/14; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2452
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) | 1945-06-08 | 1945-12-08 | 1946-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-08 | 1949-12-08 | 1950-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-08 | 1953-12-08 | 1954-06-09 | $7700.00 | Window Closed / Lapsed |