US3229198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eddy current nondestructive testing device for measuring multiple parameter variables of a metal sample
Assignee: Individual
•
Filing: 1962-09-28
•
Granted: 1966-01-11
•
Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 Hugo L Libby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10; G01N; G01N27/00; G01N27/02; G01N27/023; G01N27/72; G01N27/82; G01N27/90; G01N27/9046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
AN EDDY CURRENT DIVICE FOR MEASURING MULTIPLE PARAMETER VARIABLE OF A METAL SAMPLE COMPRISING A TEST COIL, MEANS FOR APPLYING A MULTIDIMENSIONAL EXCITATION CURRENT TO SAID TEST COIL, MEANS FOR EXPANDING THE RECEIVED SIGNAL OF SAID COIL INTO SIGNALS PROPORTIONAL TO THE COEFFICIENTS OF THE FOURIER EXPANSION OF SAID RECEIVED SIGNAL, AND MEANS FOR COMBINING SAID EXPANDED SIGNALS TO GIVE A PLU-
Claim 2
Dependent Claim
62 words
AN EDDY CURRENT DIVICE FOR MEASURING MULTIPLE PARAMETER VARIABLE OF A METAL SAMPLE COMPRISING A TEST COIL, MEANS FOR APPLYING A MULTIDIMENSIONAL EXCITATION CURRENT TO SAID TEST COIL, MEANS FOR EXPANDING THE RECEIVED SIGNAL OF SAID COIL INTO SIGNALS PROPORTIONAL TO THE COEFFICIENTS OF THE FOURIER EXPANSION OF SAID RECEIVED SIGNAL, AND MEANS FOR COMBINING SAID EXPANDED SIGNALS TO GIVE A PLU-
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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) | 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 |