US3439773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for imparting a seismic pulse to the earth
Assignee: Sinclair Research Inc
•
Filing: 1967-05-05
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Granted: 1969-04-22
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Expires: 1987-05-05
Abstract
No abstract record available.
Inventors
- 👤 Rodger W Dart
- 👤 Richard E Smythe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:27
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/104; G01V1/108; G01V1/112; Y; Y10; Y10S; Y10S181/00; Y10S181/40; Y10S181/401
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3029733A
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US3260327A
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US3283844A
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US3318411A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |