US2420415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: Leeds and Northrup Co
•
Filing: 1942-10-17
•
Granted: 1947-05-13
•
Expires: 1962-10-17
Abstract
No abstract record available.
Inventors
- 👤 Edward S Bristol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/27; G05D23/1906; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2511; Y10T137/2514; Y10T137/2521; Y10T137/2529
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1827417A
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US2105686A
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US1523414A
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US1437626A
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US1767588A
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US1886575A
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US1975085A
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US2160400A
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US2114704A
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US2072442A
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US2339289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |