US2578447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condition-responsive system
Assignee: Thomas A Edison Inc
•
Filing: 1948-06-04
•
Granted: 1951-12-11
•
Expires: 1968-06-04
Abstract
No abstract record available.
Inventors
- 👤 Carl H Odell
- 👤 Raymond B Lewthwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02; G01K1/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1954170A
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US2043673A
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GB502711A
Cited
US2278939A
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US2304698A
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US2444733A
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US2407361A
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US2449304A
Cited
GB612362A
Cited
US2440002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |