US3337746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic well logging with time interval multiplication
Assignee: Dresser Industries Inc
•
Filing: 1965-03-12
•
Granted: 1967-08-22
•
Expires: 1985-03-12
Abstract
No abstract record available.
Inventors
- 👤 Heinz W Georgi
- 👤 Adrian P Brokaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:32
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
APPARATUS FOR PROCESSING A FIRST SIGNAL OF ONE TIME DURATION INTO A SECOND SIGNAL OF PREDERTERMINED PROPORTIONATELY RELATED TIME DURATION, COMPRISING A CORE OF MAGNETIC MATERIAL IN WHICH THE CHARACTERISTIC HYSTERESIS LOOP IS SUBSTANTIALLY RECTANGULAR, SAID CORE BEING NORMALLY MAGNETIZED TO SATURATION IN ONE DIRECTION, MEANS APPLYING A PREDETERMINED UNIDIRECTIONAL CURRENT FOR THE DURATION OF THE FIRST SIGNAL IN A DIRECTION TENDING TO OPPOSITELY MAGNETIZE SAID CORE TOWARDS BUT NOT TO SATURATION, MEANS DERIVING A PREDETERMINED UNIDIRECTIONAL CURRENT IN A DIRECTION TO RE-MAGNETIZE THE CORE IN SAID ONE DIRECTION AND PRODUCE THE SECOND SIGNAL FOR THE DURATION OF THE RE-MAGNETIZATION, SAID DURATION OF RE-MAGNETIZATION TERMINATING UPON RESATURATION OF THE CORE, AND MEANS FOR MEASURING SAID DURATION OF RE-MAGNETIZATION AND RELATING SAID DURATION OF RE-MAGNETIZATION TO SAID DURATION OF SAID FIRST SIGNAL.
Claim 2
Dependent Claim
131 words
APPARATUS FOR PROCESSING A FIRST SIGNAL OF ONE TIME DURATION INTO A SECOND SIGNAL OF PREDERTERMINED PROPORTIONATELY RELATED TIME DURATION, COMPRISING A CORE OF MAGNETIC MATERIAL IN WHICH THE CHARACTERISTIC HYSTERESIS LOOP IS SUBSTANTIALLY RECTANGULAR, SAID CORE BEING NORMALLY MAGNETIZED TO SATURATION IN ONE DIRECTION, MEANS APPLYING A PREDETERMINED UNIDIRECTIONAL CURRENT FOR THE DURATION OF THE FIRST SIGNAL IN A DIRECTION TENDING TO OPPOSITELY MAGNETIZE SAID CORE TOWARDS BUT NOT TO SATURATION, MEANS DERIVING A PREDETERMINED UNIDIRECTIONAL CURRENT IN A DIRECTION TO RE-MAGNETIZE THE CORE IN SAID ONE DIRECTION AND PRODUCE THE SECOND SIGNAL FOR THE DURATION OF THE RE-MAGNETIZATION, SAID DURATION OF RE-MAGNETIZATION TERMINATING UPON RESATURATION OF THE CORE, AND MEANS FOR MEASURING SAID DURATION OF RE-MAGNETIZATION AND RELATING SAID DURATION OF RE-MAGNETIZATION TO SAID DURATION OF SAID FIRST SIGNAL.
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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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |