Patent US2500746A successfully refreshed from Google Patents.
US2500746A
Expired / Lapsed
US
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Position recorder
Assignee: General Electric Co
•
Filing: 1947-11-18
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Granted: 1950-03-14
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Expires: 1967-11-18
Abstract
No abstract record available.
Inventors
- 👤 Francis R Ellenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:12
CPC Classifications
G; G08; G08C; G08C19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1597828A
Cited
US1620405A
Cited
US2135028A
Cited
US2143233A
Cited
US2400828A
Cited
US2434531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |