US3229197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsed electromagnetic field system for nondestructive testing
Assignee: Individual
•
Filing: 1961-10-31
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Granted: 1966-01-11
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Expires: 1981-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Claus J Renken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:30
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A DEVICE FOR DETECTING SUBSURFACE IRREGULARITIES IN A METAL SAMPLE COMPRISING A TRANSMITTING COIL MOUNTED ADJACENT ONE SIDE OF SAID METAL SAMPLE, MEANS FOR APPLYING ALTERNATE LONG AND SHORT DURATION PULSES TO SAID TRANSMITTING COIL, HIGH-RETULANCE MEANS FOR SHIELDING SAID TRANSMITTING COIL TO CAUSE ONLY A PORTION OF THE PULSED ELECTROMAGNETIC FIELDS RESULTING FROM SAID LONG AND SHORT PULSES APPLIED TO SAID TRANSMITTING COIL TO BE TRANSMITTED THEREFROM TO SAID METAL, SAMPLE, A RECEIVING COIL MOUNTED ADJACENT SAID TRANSMITTING COIL AND ALIGNED TO DETECT THE REFLECTED ELECTROMAGNETIC FIELDS FROM SAID METAL SAMPLE DUE TO SAID TRANSMITTED PULSED ELECTROMAGNETIC FIELDS, AND MEANS FOR DISCRIMINATING FROM SAID DETECTED REFLECTED ELECTROMAGNETIC FIELDS THE REFLECTED ELECTROMAGNETIC FIELDS CAUSED BY SUBSURFACE IRREGULARITIES IN SAID METAL.
Claim 2
Independent Claim
120 words
A DEVICE FOR DETECTING SUBSURFACE IRREGULARITIES IN A METAL SAMPLE COMPRISING A TRANSMITTING COIL MOUNTED ADJACENT ONE SIDE OF SAID METAL SAMPLE, MEANS FOR APPLYING ALTERNATE LONG AND SHORT DURATION PULSES TO SAID TRANSMITTING COIL, HIGH-RETULANCE MEANS FOR SHIELDING SAID TRANSMITTING COIL TO CAUSE ONLY A PORTION OF THE PULSED ELECTROMAGNETIC FIELDS RESULTING FROM SAID LONG AND SHORT PULSES APPLIED TO SAID TRANSMITTING COIL TO BE TRANSMITTED THEREFROM TO SAID METAL, SAMPLE, A RECEIVING COIL MOUNTED ADJACENT SAID TRANSMITTING COIL AND ALIGNED TO DETECT THE REFLECTED ELECTROMAGNETIC FIELDS FROM SAID METAL SAMPLE DUE TO SAID TRANSMITTED PULSED ELECTROMAGNETIC FIELDS, AND MEANS FOR DISCRIMINATING FROM SAID DETECTED REFLECTED ELECTROMAGNETIC FIELDS THE REFLECTED ELECTROMAGNETIC FIELDS CAUSED BY SUBSURFACE IRREGULARITIES IN SAID METAL.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |