US3341010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-visible penetrant methods of flaw detection and apparatus therefor
Assignee: Switzer Brothers Inc
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Filing: 1961-10-12
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Granted: 1967-09-12
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Expires: 1981-10-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:02
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE LIQUID PENETRANT METHOD OF NON-DESTRUCTIVE TESTING TEST BODIES FOR SUB-SURFACE FLAWS HAVING SURFACE OPENINGS COMPRISING THE STEPS OF ENTRAPPING A LIQUID PENETRANT IN AT LEAST THE SURFACE OPENINGS OF THE FLAWS WHILE REMOVING THE PENETRANT FROM UNFLAWED SURFACE AREAS, DEVELOPING A FLAW INDICATION ON THE TEST BODY BY MEANS OF A SCINTILLATING AGENT EMITTING RADIANT ENERGY OF A WAVE LENGTH LESS THAN VISIBLE LIGHT, SUBJECTING SAID TEST BODY TO A SOURCE OF ACTIVATING RADIANT ENERGY OF HIGHER ENERGY LEVEL THAN SAID EMITTED ENERGY AND DETECTING SAID FLAWS BY MEANS RESPONSIVE TO SAID EMITTED ENERGY.
Claim 2
Dependent Claim
95 words
THE LIQUID PENETRANT METHOD OF NON-DESTRUCTIVE TESTING TEST BODIES FOR SUB-SURFACE FLAWS HAVING SURFACE OPENINGS COMPRISING THE STEPS OF ENTRAPPING A LIQUID PENETRANT IN AT LEAST THE SURFACE OPENINGS OF THE FLAWS WHILE REMOVING THE PENETRANT FROM UNFLAWED SURFACE AREAS, DEVELOPING A FLAW INDICATION ON THE TEST BODY BY MEANS OF A SCINTILLATING AGENT EMITTING RADIANT ENERGY OF A WAVE LENGTH LESS THAN VISIBLE LIGHT, SUBJECTING SAID TEST BODY TO A SOURCE OF ACTIVATING RADIANT ENERGY OF HIGHER ENERGY LEVEL THAN SAID EMITTED ENERGY AND DETECTING SAID FLAWS BY MEANS RESPONSIVE TO SAID EMITTED ENERGY.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |