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US2648055A
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Apparatus for detecting and recording measurements of seismic, gravitational, and other forces
Assignee: Individual
•
Filing: 1951-07-11
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Granted: 1953-08-04
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Expires: 1971-07-11
Abstract
No abstract record available.
Inventors
- 👤 Neal J Smith
- 👤 Roberta I Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:14
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181; G01V7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1823326A
Cited
US2297251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |