US3114039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-developing penetrant method of flaw detection and penetrant therefor
Assignee: Switzer Brothers Inc
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Filing: 1960-08-31
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Granted: 1963-12-10
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Expires: 1980-08-31
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:21
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
THE METHOD OF DETECTING FLAWS HAVING SURFACE OPENINGS IN TEST BODIES COMPRISING THE STEPS OF APPLYING TO THE SURFACE OF THE TEST BODY A PENETRANT LIQUID CARRYING A TRACER MATERIAL, SAID PENETRANT LIQUID BEING NORMALLY CAPABLE OF WETTING AND SPREADING INTO SURFACE OPENINGS OF FLAWS IN THE TEST BODY BUT CAPABLE OF BEING RELATIVELY IMMOBILIZED IN RESPONSE TO A GIVEN FORM OF ENERGY, REMOVING SAID PENETRANT FROM SAID BODY AFTER SAID PENETRANT HAS PENETRATED INTO SUCH SURFACE OPENINGS, CAUSING PENETRANT RETAINED IN SAID FLAWS AND FLAW OPENINGS TO EXUDE TO THE SURFACE OF SAID TEST BODY, DEVELOPING SAID EXUDED PENETRANT BY APPLYING ENERGY TO WHICH SAID PENETRANT IS RESPONSIVE IN ORDER TO ALTER AND RELATIVELY IMMOBILIZE SAID EXUDED PENETRANT AT AND AROUND SAID FLAW OPENINGS, AND THEN INSPECTING SAID TEST BODY TO ASCERTAIN THE EXTENT AND LOCATION OF SAID FLAW OPENINGS BY INDICATIONS PRODUCED BY THE TRACER IN SAID EXUDED AND IMMOBILIZED PENETRANT.
Claim 2
Independent Claim
153 words
THE METHOD OF DETECTING FLAWS HAVING SURFACE OPENINGS IN TEST BODIES COMPRISING THE STEPS OF APPLYING TO THE SURFACE OF THE TEST BODY A PENETRANT LIQUID CARRYING A TRACER MATERIAL, SAID PENETRANT LIQUID BEING NORMALLY CAPABLE OF WETTING AND SPREADING INTO SURFACE OPENINGS OF FLAWS IN THE TEST BODY BUT CAPABLE OF BEING RELATIVELY IMMOBILIZED IN RESPONSE TO A GIVEN FORM OF ENERGY, REMOVING SAID PENETRANT FROM SAID BODY AFTER SAID PENETRANT HAS PENETRATED INTO SUCH SURFACE OPENINGS, CAUSING PENETRANT RETAINED IN SAID FLAWS AND FLAW OPENINGS TO EXUDE TO THE SURFACE OF SAID TEST BODY, DEVELOPING SAID EXUDED PENETRANT BY APPLYING ENERGY TO WHICH SAID PENETRANT IS RESPONSIVE IN ORDER TO ALTER AND RELATIVELY IMMOBILIZE SAID EXUDED PENETRANT AT AND AROUND SAID FLAW OPENINGS, AND THEN INSPECTING SAID TEST BODY TO ASCERTAIN THE EXTENT AND LOCATION OF SAID FLAW OPENINGS BY INDICATIONS PRODUCED BY THE TRACER IN SAID EXUDED AND IMMOBILIZED PENETRANT.
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) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |