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Patent US2693245A successfully refreshed from Google Patents.
US2693245A
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Seismic wave generating apparatus
Assignee: Seismograph Service Corp
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Filing: 1949-01-10
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Granted: 1954-11-02
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Expires: 1969-01-10
Abstract
No abstract record available.
Inventors
- 👤 James E Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:43
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/104; G01V1/13; Y; Y10; Y10S; Y10S102/00; Y10S102/701
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US152053A
Cited
USRE17242E
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US2133484A
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US2340314A
Cited
US2580636A
Cited
US2609885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |