Patent US3158802A successfully refreshed from Google Patents.
US3158802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonance absorption apparatus and method for measuring magnitude and direction of a magnetic field
Assignee: Union Carbide Corp
•
Filing: 1959-11-12
•
Granted: 1964-11-24
•
Expires: 1979-11-12
Abstract
No abstract record available.
Inventors
- 👤 Jung Paul
- 👤 Jean Leon Van Cakenberghe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:43
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
APPARATUS FOR MEASURING THE MAGNITUDE AND DIRECTION OF AN EXTERNAL MAGNETIC FIELD COMPRISING: A PARAMAGNETIC SUBSTANCE HAVING A DETERMINABLE MAGNETIC RESONANCE ABSORBTION FREQUENCY AND MAGNITUDE CHARACTERISTIC; FIRST GENERATOR MEANS FOR IMPOSING ON SAID PARAMAGNETIC SUBSTANCE A HIGH FREQUENCY MAGNETIC FIELD, SECOND GENERATOR MEANS FOR IMPOSING ON SAID SUBSTANCE A LOW FREQUENCY MAGNETIC FIELD PARALLEL TO SAID HIGH FREQUENCY FIELD AND HAVING A FREQUENCY AND A MAGNITUDE LESS RESPECTIVELY THAN THE CHARACTERISTIC MAGNETIC RESONANCE ABSORPTION FREQUENCY AND MAGNITUDE OF SAID PARAMAGNETIC SUBSTANCE, AND THIRD GENERATOR MEANS FOR IMPOSING ON SAID SUBSTANCE A MAGNETIC FIELD OF CONSTANT MAGNITUDE LESS THAN THE MAGNETIC RESONANCE ABSORPTION MAGNITUDE OF SAID PARAMAGNETIC SUBSTANCE ROTATING WITH A CONSTANT ANGULAR VELOCITY LESS THAN THE ANGULAR VELOCITY CORRESPONDING TO THE MAGNETIC RESONANCE ABSORPTION FREQUENCY OF SAID PARAMAGNETIC SUBSTANCE IN A PLANE PERPENDICULAR TO THE AXIS OF SAID LOW FREQUENCY FIELD; AND MEANS FOR MEASURING ASYMMETRICAL VARIATIONS IN THE ABSORPTION OF SAID PARAMAGNETIC SUBSTANCE.
Claim 2
Dependent Claim
154 words
APPARATUS FOR MEASURING THE MAGNITUDE AND DIRECTION OF AN EXTERNAL MAGNETIC FIELD COMPRISING: A PARAMAGNETIC SUBSTANCE HAVING A DETERMINABLE MAGNETIC RESONANCE ABSORBTION FREQUENCY AND MAGNITUDE CHARACTERISTIC; FIRST GENERATOR MEANS FOR IMPOSING ON SAID PARAMAGNETIC SUBSTANCE A HIGH FREQUENCY MAGNETIC FIELD, SECOND GENERATOR MEANS FOR IMPOSING ON SAID SUBSTANCE A LOW FREQUENCY MAGNETIC FIELD PARALLEL TO SAID HIGH FREQUENCY FIELD AND HAVING A FREQUENCY AND A MAGNITUDE LESS RESPECTIVELY THAN THE CHARACTERISTIC MAGNETIC RESONANCE ABSORPTION FREQUENCY AND MAGNITUDE OF SAID PARAMAGNETIC SUBSTANCE, AND THIRD GENERATOR MEANS FOR IMPOSING ON SAID SUBSTANCE A MAGNETIC FIELD OF CONSTANT MAGNITUDE LESS THAN THE MAGNETIC RESONANCE ABSORPTION MAGNITUDE OF SAID PARAMAGNETIC SUBSTANCE ROTATING WITH A CONSTANT ANGULAR VELOCITY LESS THAN THE ANGULAR VELOCITY CORRESPONDING TO THE MAGNETIC RESONANCE ABSORPTION FREQUENCY OF SAID PARAMAGNETIC SUBSTANCE IN A PLANE PERPENDICULAR TO THE AXIS OF SAID LOW FREQUENCY FIELD; AND MEANS FOR MEASURING ASYMMETRICAL VARIATIONS IN THE ABSORPTION OF SAID PARAMAGNETIC SUBSTANCE.
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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |