US3359495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic reaction testing apparatus and method of testing utilizing semiconductor means for magnetic field sensing of an eddy-current-reaction magnetic field
Assignee: F W BELL Inc
•
Filing: 1964-08-13
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Granted: 1967-12-19
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Expires: 1984-08-13
Abstract
No abstract record available.
Inventors
- 👤 Robert C Mcmaster
- 👤 Edwin D Sisson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:49
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9046; G01N27/9006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A MAGNETIC-REACTION TEST APPARATUS FOR NONDESTRUCTIVE TESTING COMPRISING INDUCTOR MEANS ENERGIZED TO PRODUCE A TIME-VARYING MAGNETIC FIELD OF PULSE OR PERIODIC WAVEFORM POSITIONED IN PREDETERMINED RELATIONSHIP TO A MATERIAL TO BE TESTED HAVING SPECIFIC PARAMETERS AND DISPOSED TO ELECTROMAGNETICALLY COUPLE SAID MAGNETIC FIELD WITH THE MATERIAL AND EFFECT AN EDDY-CURRENT REACTION MAG-
Claim 2
Dependent Claim
52 words
A MAGNETIC-REACTION TEST APPARATUS FOR NONDESTRUCTIVE TESTING COMPRISING INDUCTOR MEANS ENERGIZED TO PRODUCE A TIME-VARYING MAGNETIC FIELD OF PULSE OR PERIODIC WAVEFORM POSITIONED IN PREDETERMINED RELATIONSHIP TO A MATERIAL TO BE TESTED HAVING SPECIFIC PARAMETERS AND DISPOSED TO ELECTROMAGNETICALLY COUPLE SAID MAGNETIC FIELD WITH THE MATERIAL AND EFFECT AN EDDY-CURRENT REACTION MAG-
References Cited (Backward Citations)
US2033654A
Cited
US1998952A
Cited
GB475369A
Cited
US2162710A
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US2337148A
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US2629004A
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US2942177A
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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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |