US2585589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential control
Assignee: Robotron Corp
•
Filing: 1951-06-27
•
Granted: 1952-02-12
•
Expires: 1971-06-27
Abstract
No abstract record available.
Inventors
- 👤 Stuart C Rockafellow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:22
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16504; G01R19/16514
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2366500A
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US2425734A
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US2412092A
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US2441568A
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US2442491A
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US2504955A
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US2473279A
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US2534801A
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US2534958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |