US3254298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for measurement of thin magnetic film parameters
Assignee: Unisys Corp
•
Filing: 1963-09-09
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Granted: 1966-05-31
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Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 David M Ellis
- 👤 Clifford J Bader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:47
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/12; G01R33/1207; G01N; G01N22/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
AN INSTRUMENT FOR MEASURING THE PARAMETERS OF MAGNETIC MATERIAL POSSESSING AN AVERAGE MAGNETIC MOMENT AND BEING CAPABLE OF ATTAINING OPPOSED STATES OF RESIDUAL FLUX DENSITY ALONG A PREFERRED AXIS OF MAGNETIZATION, COMPRISING MEANS FOR APPLYING TO A PORTION OF SAID MATERIAL RADIO FREQUENCY MAGNETIC FIELDS IN FIXED ORTHOGONAL RELATIONSHIP TO EACH OTHER, SAID RADIO FREQUENCY FIELDS BEING OF SUCH MAGNITUDE AS TO VARY BUT NOT REVERSE THE DIRECTION OF MAGNETIZATION OF SAID PORTION OF SAID MATERIAL, MEANS FOR CAUSING AN ANGULAR DISPLACEMENT OF SAID RADIO FREQUENCY FIELDS WITH RESPECT TO THE PHYSICAL POSITION OF SAID PORTION OF SAID MATERIAL, MEANS FOR SENSING A PRESELECTED COMBINATORIAL FREQUENCY COMPONENT OF THE MAGNETIC FLUX GENERATED BY SAID RADIO FREQUENCY FIELDS IN SAID PORTION OF SAID MATERIAL, THE AMPLITUDE AND PHASE OF SAID FREQUENCY COMPONENT BEING A FUNCTION OF BOTH THE ANGULAR RELATIONSHIP BETWEEN THE DIRECTIONS OF THE MAGNETIC MOMENT AND THE PREFERRED AXIS IN SAID PORTION OF SAID MATERIAL AND THAT BETWEEN SAID RADIO FREQUENCY FIELDS AND THE MAGNETIC MOMENT IN SAID PORTION OF SAID MATERIAL, SAID FREQUENCY COMPONENT BEING ZERO WHEN SAID LATTER COMPONENT COINCIDES WITH SAID MAGNETIC MOMENT, THEREBY CORRELATING THE ABSOLUTE ANGULAR DISPLACEMENT OF SAID RADIO FREQUENCY FIELDS WITH THE POSITION OF THE MAGNETIC MOMENT.
Claim 2
Dependent Claim
205 words
AN INSTRUMENT FOR MEASURING THE PARAMETERS OF MAGNETIC MATERIAL POSSESSING AN AVERAGE MAGNETIC MOMENT AND BEING CAPABLE OF ATTAINING OPPOSED STATES OF RESIDUAL FLUX DENSITY ALONG A PREFERRED AXIS OF MAGNETIZATION, COMPRISING MEANS FOR APPLYING TO A PORTION OF SAID MATERIAL RADIO FREQUENCY MAGNETIC FIELDS IN FIXED ORTHOGONAL RELATIONSHIP TO EACH OTHER, SAID RADIO FREQUENCY FIELDS BEING OF SUCH MAGNITUDE AS TO VARY BUT NOT REVERSE THE DIRECTION OF MAGNETIZATION OF SAID PORTION OF SAID MATERIAL, MEANS FOR CAUSING AN ANGULAR DISPLACEMENT OF SAID RADIO FREQUENCY FIELDS WITH RESPECT TO THE PHYSICAL POSITION OF SAID PORTION OF SAID MATERIAL, MEANS FOR SENSING A PRESELECTED COMBINATORIAL FREQUENCY COMPONENT OF THE MAGNETIC FLUX GENERATED BY SAID RADIO FREQUENCY FIELDS IN SAID PORTION OF SAID MATERIAL, THE AMPLITUDE AND PHASE OF SAID FREQUENCY COMPONENT BEING A FUNCTION OF BOTH THE ANGULAR RELATIONSHIP BETWEEN THE DIRECTIONS OF THE MAGNETIC MOMENT AND THE PREFERRED AXIS IN SAID PORTION OF SAID MATERIAL AND THAT BETWEEN SAID RADIO FREQUENCY FIELDS AND THE MAGNETIC MOMENT IN SAID PORTION OF SAID MATERIAL, SAID FREQUENCY COMPONENT BEING ZERO WHEN SAID LATTER COMPONENT COINCIDES WITH SAID MAGNETIC MOMENT, THEREBY CORRELATING THE ABSOLUTE ANGULAR DISPLACEMENT OF SAID RADIO FREQUENCY FIELDS WITH THE POSITION OF THE MAGNETIC MOMENT.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |