Patent US3075141A successfully refreshed from Google Patents.
US3075141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time-sharing electrical logging system with subsurface commutation apparatus
Assignee: Dresser Industries Inc
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Filing: 1959-12-30
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Granted: 1963-01-22
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Expires: 1979-12-30
Abstract
No abstract record available.
Inventors
- 👤 Jefferson P Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:40
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; G01V3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A SYSTEM FOR OBTAINING INFORMATION ON THE SUBSURFACE LITHOLOGY OF FORMATIONS SURROUNDING A BOREHOLD COMPRISING: A LOGGING TOOL INCLUDING A PLURALITY OF CURRENT ESTABLISHING MEANS; MEANS TO MOVE SAID TOOL ALONG THE EXTENT OF SAID BOREHOLE; FIRST AND SECOND SOURCES OF ALTERNATING CURRENT OF DIFFERENT FREQUENCIES, THE FREQUENCY OF THE SECOND CURRENT BEING GREATER THAN, AND AN INTEGRAL MULTIPLE OF, THE FREQUENCY OF THE FIRST CURRENT; MEANS TO COMBINE THE OUTPUTS OF SAID SOURCES AND TRANSMIT THEM TO SAID LOGGING TOOL; MECHANICAL, INTEGRAL CYCLE SWITCHING MEANS ASSOCIATED WITH SAID LOGGING TOOL RESPONSIVE TO SAID FIRST SOURCE TO CONNECT SAID SECOND SOURCE SEQUENTIALLY TO DIFFERENT ONES OF SAID CURRENT ESTABLISHING MEANS, SAID SWITCHING MEANS INCLUDING CONTACTS SHORTED DURING PRESELECTED PERIODS INTERMEDIATE THE OPERATED AND RELEASED CONDITIONS THEREOF; AND MEANS REMOTE FROM SAID CURRENT ESTABLISHING MEANS TO SAMPLE THE TIME-DISPLACED FIELDS ESTABLISHED BY THE SEQUENTIAL CONNECTION OF SAID SECOND SOURCE TO DIFFERENT ONES OF SAID CURRENT ESTABLISHING MEANS.
Claim 2
Independent Claim
156 words
A SYSTEM FOR OBTAINING INFORMATION ON THE SUBSURFACE LITHOLOGY OF FORMATIONS SURROUNDING A BOREHOLD COMPRISING: A LOGGING TOOL INCLUDING A PLURALITY OF CURRENT ESTABLISHING MEANS; MEANS TO MOVE SAID TOOL ALONG THE EXTENT OF SAID BOREHOLE; FIRST AND SECOND SOURCES OF ALTERNATING CURRENT OF DIFFERENT FREQUENCIES, THE FREQUENCY OF THE SECOND CURRENT BEING GREATER THAN, AND AN INTEGRAL MULTIPLE OF, THE FREQUENCY OF THE FIRST CURRENT; MEANS TO COMBINE THE OUTPUTS OF SAID SOURCES AND TRANSMIT THEM TO SAID LOGGING TOOL; MECHANICAL, INTEGRAL CYCLE SWITCHING MEANS ASSOCIATED WITH SAID LOGGING TOOL RESPONSIVE TO SAID FIRST SOURCE TO CONNECT SAID SECOND SOURCE SEQUENTIALLY TO DIFFERENT ONES OF SAID CURRENT ESTABLISHING MEANS, SAID SWITCHING MEANS INCLUDING CONTACTS SHORTED DURING PRESELECTED PERIODS INTERMEDIATE THE OPERATED AND RELEASED CONDITIONS THEREOF; AND MEANS REMOTE FROM SAID CURRENT ESTABLISHING MEANS TO SAMPLE THE TIME-DISPLACED FIELDS ESTABLISHED BY THE SEQUENTIAL CONNECTION OF SAID SECOND SOURCE TO DIFFERENT ONES OF SAID CURRENT ESTABLISHING MEANS.
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |