US2708485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging
Assignee: Shell Development Co
•
Filing: 1952-04-29
•
Granted: 1955-05-17
•
Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Charles B Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:30
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
APPARATUS FOR SEISMIC VELOCITY MEASUREMENTS, COMPRISING TWO RECEIVERS SPACED FROM EACH OTHER ALONG A SUBSTANTIALLY VERTICAL LINE, TWO TRANSMITTERS POSITIONED ALONG SAID VERTICAL LINE ONE ABOVE AND THE OTHER BELOW SAID TWO RECEIVERS, MEANS FOR ALTERNATELY ENERGIZING EACH OF SAID TWO TRANSMITTERS TO PRODUCE ACOUSTIC IMPULSES TRAVELING PAST SAID TWO RECEIVERS ALTERNATELY IN OPPOSITE DIRECTIONS, MEANS AT EACH RECEIVER FOR DETECTING THE ARRIVAL THERETO OF EACH OF SAID IMPULSES, AND MEANS ELECTRICALLY CONNECTED TO SAID TRANSMITTERS AND SAID RECEIVERS FOR RECORDING THE DETECTED IMPULSES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |