US3249861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for magnetic flaw detection by depositing magnetic particles ononly the area of the flaw
Assignee: ThyssenKrupp Budd Co
•
Filing: 1962-09-18
•
Granted: 1966-05-03
•
Expires: 1982-09-18
Abstract
No abstract record available.
Inventors
- 👤 Pevar Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:10
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/83; G01N27/84
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
FOR TESTING A FERROMAGNETIC MEMBER FOR DISCONTINUITIES THEREIN, THE COMBINATION: MAGNETIZING MEANS FOR MAGNETIZING SAID MEMBER; A SUPPLY OF MAGNETIC PARTICLES; MEANS FOR ELECTROMAGNETICALLY DETECTING THE LOCALITY OF A DISCONTINUITY IN SAID MEMBER AND PRODUCING AN ELECTRIC SIGNAL IN RESPONSE THERETO; SELECTIVELY OPERABLE MEANS FOR DEPOSITING SAID PARTICLES ON LOCALIZED AREAS OF SAID MEMBER; AND MEANS FOR OPERATING SAID SELECTIVELY OPERABLE MEANS IN RESPONSE TO SAID ELECTRICAL SIGNAL TO DEPOSIT SAID MAGNETIC PARTICLES ON THE SURFACE OF SAID MEMBER AT SAID LOCALITY OF SAID DISCONITNUITY TO FORM A PATTERN DUE TO LEAKAGE FLUX IN THE MEMBER CAUSED BY MAGNETIZATION THEREOF INDICATIVE OF THE NATURE AND LOCATION OF A FLAW.
References Cited (Backward Citations)
US2057091A
Cited
US2216600A
Cited
US2842292A
Cited
US2678421A
Cited
US2895851A
Cited
US2930972A
Cited
US2971150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |