US2552722A
Expired / Lapsed
US
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Electromagnetic accelerometer
Assignee: Pennsylvania Research Corp
•
Filing: 1948-08-09
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Granted: 1951-05-15
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Expires: 1968-08-09
Abstract
No abstract record available.
Inventors
- 👤 John G King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:58
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/11; Y; Y10; Y10S; Y10S33/00; Y10S33/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22409E
Cited
US2455939A
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US2090521A
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US2193910A
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US2266449A
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US2359245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |