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US2427902A
Expired / Lapsed
US
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Apparatus fob the gravitational
Assignee: —
•
Filing: —
•
Granted: 1947-09-23
•
Expires: 1964-09-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:25
CPC Classifications
G; G01; G01N; G01N17/00; G01N17/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1724870A
Cited
GB411775A
Cited
US2205254A
Cited
US2202987A
Cited
US2193315A
Cited
US2252757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-22 | 1951-03-24 | 1951-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-22 | 1955-03-24 | 1955-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-22 | 1959-03-24 | 1959-09-23 | $7700.00 | Window Closed / Lapsed |