US3213359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-inductive hall-cell magnetometer
Assignee: General Dynamics Corp
•
Filing: 1963-01-15
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Granted: 1965-10-19
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Expires: 1983-01-15
Abstract
No abstract record available.
Inventors
- 👤 Richard W Freytag
- 👤 Joseph W Gratian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:42
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/06; G01R33/07; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/37; G11B5/376; H; H10; H10N; H10N52/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A MAGNETIC SENSING DEVICE FOR SENSING MINUTE MAGNETIC FIELDS, SAID SENSING DEVICE COMPRISING A WAFER OF SEMICONDUCTOR MATERIAL HAVING HALL-EFFECT CHARACTERISTICS WHEN DIRECT CURRENT IS DIRECTED ALONG ONE PLANAR AXIS OF THE WAFER TO GENERATE A HALL-VOLTAGE ON THE OTHER PLANAR AXIS OF THE WAFER WHICH VOLTAGE IS A FUNCTION OF THE MAGNETIC FIELD NORMAL TO BE PLANE OF THE WAFER, MEANS FOR MINIMIZING THE EXTERNAL MAGNETIC FIELD PRODUCED BY SIAD DIRECT CURRENT ALONG SAID ONE PLANAR AXIS COMPRISING A CONDUCTOR SHEET IN CLOSE SPACED PARALLEL RELATIONSHIP WITH SAID WAFER, MEANS FOR CONNECTING SAID WAFER AND SHEET IN SERIES WITH EACH OTHER SO THAT CURRENT OFEEQUAL AMPLITUDE FLOWS IN OPPOSITE DIRECTION THROUGH SAID WAFER AND SHEET.
Claim 2
Dependent Claim
116 words
A MAGNETIC SENSING DEVICE FOR SENSING MINUTE MAGNETIC FIELDS, SAID SENSING DEVICE COMPRISING A WAFER OF SEMICONDUCTOR MATERIAL HAVING HALL-EFFECT CHARACTERISTICS WHEN DIRECT CURRENT IS DIRECTED ALONG ONE PLANAR AXIS OF THE WAFER TO GENERATE A HALL-VOLTAGE ON THE OTHER PLANAR AXIS OF THE WAFER WHICH VOLTAGE IS A FUNCTION OF THE MAGNETIC FIELD NORMAL TO BE PLANE OF THE WAFER, MEANS FOR MINIMIZING THE EXTERNAL MAGNETIC FIELD PRODUCED BY SIAD DIRECT CURRENT ALONG SAID ONE PLANAR AXIS COMPRISING A CONDUCTOR SHEET IN CLOSE SPACED PARALLEL RELATIONSHIP WITH SAID WAFER, MEANS FOR CONNECTING SAID WAFER AND SHEET IN SERIES WITH EACH OTHER SO THAT CURRENT OFEEQUAL AMPLITUDE FLOWS IN OPPOSITE DIRECTION THROUGH SAID WAFER AND SHEET.
References Cited (Backward Citations)
DE1043500B
Cited
US2855549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |