US3299348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic susceptibility measuring system
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1963-02-08
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Granted: 1967-01-17
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Expires: 1983-02-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John O Beauxis
- 👤 James T Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:59
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/12; G01R33/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A SYSTEM FOR MAKING MAGNETIC SUSCEPTIBILITY MEASUREMENTS OF A SAMPLE COMPRISING: A WEIGHT INDICATOR FOR THE SAMPLE; TEMPERATURE-SENSING MEANS FOR SENSING THE TEMPERATURE OF THE SAMPLE; AN ELECTROMAGNETIC CIRCUIT FOR SUBJECTING THE SAMPLE TO A MAGNETIC FIELD, SAID ELECTROMAGNETIC CIRCUIT HAVING MAGNET CURRENT CONTROL MEANS INCLUDING A REFERENCE VOLTAGE MEANS AND A FEEDBACK VOLTAGE MEANS RESPONSIVE TO CHANGES IN REFERENCE VOLTAGES TO MAINTAIN THE DIFFERENCE BETWEEN THE REFERENCE VOLTAGE AND FEEDBACK VOLTAGE CONSTANT AND WHEREIN THE REFERENCE VOLTAGE MEANS INCLUDES TIME-OPERATED SWITCHES FOR CONTROLLING THE RISE TIME AND PEAK INTERVAL OF THE CURRENT APPLIED TO THE MAGNET; A RECORDER; AND AN ELECTRICAL CONTROL CIRCUIT INCLUDING TIMING MEANS AND SWITCHING MEANS CONTROLLED BY SAID TIMING MEANS FOR SEQUENTIALLY RECORDING THE TEMPERATURE OF THE SAMPLE, THE MASS OF THE SAMPLE, AND THE APPARENT WEIGHT CHANGE OF THE SAMPLE CAUSED BY THE MAGNETIC FIELD AT THE PEAK INTERVAL OF THE CURRENT APPLIED TO THE MAGNET.
Claim 2
Independent Claim
152 words
A SYSTEM FOR MAKING MAGNETIC SUSCEPTIBILITY MEASUREMENTS OF A SAMPLE COMPRISING: A WEIGHT INDICATOR FOR THE SAMPLE; TEMPERATURE-SENSING MEANS FOR SENSING THE TEMPERATURE OF THE SAMPLE; AN ELECTROMAGNETIC CIRCUIT FOR SUBJECTING THE SAMPLE TO A MAGNETIC FIELD, SAID ELECTROMAGNETIC CIRCUIT HAVING MAGNET CURRENT CONTROL MEANS INCLUDING A REFERENCE VOLTAGE MEANS AND A FEEDBACK VOLTAGE MEANS RESPONSIVE TO CHANGES IN REFERENCE VOLTAGES TO MAINTAIN THE DIFFERENCE BETWEEN THE REFERENCE VOLTAGE AND FEEDBACK VOLTAGE CONSTANT AND WHEREIN THE REFERENCE VOLTAGE MEANS INCLUDES TIME-OPERATED SWITCHES FOR CONTROLLING THE RISE TIME AND PEAK INTERVAL OF THE CURRENT APPLIED TO THE MAGNET; A RECORDER; AND AN ELECTRICAL CONTROL CIRCUIT INCLUDING TIMING MEANS AND SWITCHING MEANS CONTROLLED BY SAID TIMING MEANS FOR SEQUENTIALLY RECORDING THE TEMPERATURE OF THE SAMPLE, THE MASS OF THE SAMPLE, AND THE APPARENT WEIGHT CHANGE OF THE SAMPLE CAUSED BY THE MAGNETIC FIELD AT THE PEAK INTERVAL OF THE CURRENT APPLIED TO THE MAGNET.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |