US3355692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Function generators
Assignee: Schlumberger Well Surveying Corp
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Filing: 1955-04-27
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Granted: 1967-11-28
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Expires: 1975-04-27
Abstract
No abstract record available.
Inventors
- 👤 William L Poland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:50
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
AN ELECTRICAL FUNCTION-GENERATING DEVICE COMPRISING, IN COMBINATION: A MEMBER HAVING UPPER AND LOWER OPPOSED FACES, SAID MEMBER BEING FABRICATED FROM A MATERIAL HAVING UNIFORM RESISTIVE CHARACTERISTICS; A PLURALITY OF FIELD-ESTABLISHING MEANS SPACED FROM EACH OTHER AND IN CONTACT WITH THE LOWER OF SAID OPPOSED FACES, THE SPACING AND ARRANGEMENT OF SAID FIELD-ESTABLISHING MEANS BEING IN ACCORDANCE WITH A PREDETERMINED PLAN FOR ESTABLISHING A DESIRED ELECTRIC FIELD PATTERN ALONG THE SURFACE OF THE UPPER OF SAID OPPOSED FACES, SAID RESISTIVE MEMBER ACTING AS A SMOOTHING MEANS FOR REDUCING THE ABRUPTNESS OF THE VARIATIONS IN POTENTIAL BETWEEN SAID FIELD-ESTABLISHING MEANS SO THAT THE FIELD APPEARING ON SAID UPPER FACE VARIES IN A SMOOTHER MANNER THAN THE FIELD APPEARING ON SAID LOWER FACE; POTENTIAL-DERIVING MEANS IN CONTACT WITH THE SURFACE OF SAID UPPER FACE, SAID POTENTIAL-DERIVING MEANS BEING MOVABLE ALONG A PREDETERMINED PATH WHEREBY A SPECIFIC FUNCTION OF ELECTRIC POTENTIAL MAY BE DERIVED; AND MEANS FOR MOVING SAID POTENTIAL-DERIVING MEANS ALONG SAID PREDETERMINED PATH.
Claim 2
Dependent Claim
161 words
AN ELECTRICAL FUNCTION-GENERATING DEVICE COMPRISING, IN COMBINATION: A MEMBER HAVING UPPER AND LOWER OPPOSED FACES, SAID MEMBER BEING FABRICATED FROM A MATERIAL HAVING UNIFORM RESISTIVE CHARACTERISTICS; A PLURALITY OF FIELD-ESTABLISHING MEANS SPACED FROM EACH OTHER AND IN CONTACT WITH THE LOWER OF SAID OPPOSED FACES, THE SPACING AND ARRANGEMENT OF SAID FIELD-ESTABLISHING MEANS BEING IN ACCORDANCE WITH A PREDETERMINED PLAN FOR ESTABLISHING A DESIRED ELECTRIC FIELD PATTERN ALONG THE SURFACE OF THE UPPER OF SAID OPPOSED FACES, SAID RESISTIVE MEMBER ACTING AS A SMOOTHING MEANS FOR REDUCING THE ABRUPTNESS OF THE VARIATIONS IN POTENTIAL BETWEEN SAID FIELD-ESTABLISHING MEANS SO THAT THE FIELD APPEARING ON SAID UPPER FACE VARIES IN A SMOOTHER MANNER THAN THE FIELD APPEARING ON SAID LOWER FACE; POTENTIAL-DERIVING MEANS IN CONTACT WITH THE SURFACE OF SAID UPPER FACE, SAID POTENTIAL-DERIVING MEANS BEING MOVABLE ALONG A PREDETERMINED PATH WHEREBY A SPECIFIC FUNCTION OF ELECTRIC POTENTIAL MAY BE DERIVED; AND MEANS FOR MOVING SAID POTENTIAL-DERIVING MEANS ALONG SAID PREDETERMINED PATH.
References Cited (Backward Citations)
US2452664A
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US2541277A
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US2542478A
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US2617587A
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US2734137A
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US2656618A
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US2704305A
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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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |