Patent US4673927A successfully refreshed from Google Patents.
US3437170A
Expired / Lapsed
US
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Control of energy spectrum in marine seismic exploration
Assignee: Texas Instruments Inc
•
Filing: 1966-12-12
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Granted: 1969-04-08
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Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 Fred A Brock
- 👤 Roy C Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:02
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/003; G01V1/006; G01V1/02; G01V1/104; G01V1/13; G01V1/133; G01V1/137; G01V1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2771961A
Cited
US3249177A
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US3246286A
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US3310128A
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US3307285A
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US3276534A
Cited
US3322232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |