Patent US3198281A successfully refreshed from Google Patents.
US3198281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic method of prospecting
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1960-08-08
•
Granted: 1965-08-03
•
Expires: 1980-08-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Mifsud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:54
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/88; G01V; G01V1/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
A METHOD OF SEISMIC PROSPECTING COMPRISING: IMPARTING INTO THE EARTH A FIRST CONTINUOUS WAVE OF FINITE DURATION WHOSE FREQUENCY VARIES LINEARLLY; GENERATING A SECOND CONTINUOUS SIGNAL WHOSE FREQUENCY VARIES THE SAME AS SAID FIRST CONTINUOUS WAVE; CONTINUING GENERATING SAID SECOND CONTINUOUS WAVE AT THE SAME LINEAR CHANGE OF FREQUENCY BEYOND SAID FINITE DURATION; DETECTING THE REFLECTED SIGNAL FROM SAID FIRST WAVE AT THE SURFACE OF THE EARTH; AND OBTAINING THE DIFFERENCE IN FREQUENCY BETWEEN SAID DETECTED REFLECTION AND SAID SECOND WAVEFORM AT THE TIME SECOND REFLECTION IS DETECTED.
References Cited (Backward Citations)
US2156259A
Cited
US2235089A
Cited
US2521130A
Cited
US2916724A
Cited
US2794966A
Cited
US2826750A
Cited
US2928071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |