US3117227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of flow detection using visible light sensitive phosphors
Assignee: Purex Corp Ltd
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Filing: 1960-08-02
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Granted: 1964-01-07
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Expires: 1980-08-02
Abstract
No abstract record available.
Inventors
- 👤 Pollack Isidore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:37
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE METHOD OF INSPECTING BODIES FOR CRACKS AND FLAWS, COMPRISING APPLYING A FLUORESCENT PENETRANT DYE COMPOSITION CONTAINING A FLUORESCENT DYE TO A TEST BODY, SAID FLUORESCENT DYE HAVING A PREDOMINAT ACTIVATING WAVE LENGTH FOR PRODUCING MAXIMUM FLUORESCENCE, WITHIN THE VISIBLE SPECTRUM, PERMITTING SAID PENETRANT TO REMAIN ON THE TEST BODY FOR A PERIOD SUFFICIENT TO CAUSE PENETRANT TO ENTER CRACKS AND FLAWS ON THE SURFACE OF SAID BODY, REMOVING EXCESS PENETRANT COMPOSITION FROM THE SURFACE OF SAID TEST BODY, APPLYING A DEVELOPING COMPOSITION CONTAINING AN ABSORBENT POWDER TO SAID TEST BODY, AND INSPECTING SUCH BODY SOLELY UNDER LIGHT WAVES IN THE VISIBLE SPECTRUM HAVING A WAVE LENGTH CORRESPONDING TO THE PREDOMINANT ACTIVATING WAVE LENGTH FOR PRODUCING MAXIMUM FLUORESCENCE OF SAID FLUORESCENT DYE, AND PRODUCING A FLUORESCENT EMISSION FROM SAID FLUORESCENT DYE.
Claim 2
Independent Claim
131 words
THE METHOD OF INSPECTING BODIES FOR CRACKS AND FLAWS, COMPRISING APPLYING A FLUORESCENT PENETRANT DYE COMPOSITION CONTAINING A FLUORESCENT DYE TO A TEST BODY, SAID FLUORESCENT DYE HAVING A PREDOMINAT ACTIVATING WAVE LENGTH FOR PRODUCING MAXIMUM FLUORESCENCE, WITHIN THE VISIBLE SPECTRUM, PERMITTING SAID PENETRANT TO REMAIN ON THE TEST BODY FOR A PERIOD SUFFICIENT TO CAUSE PENETRANT TO ENTER CRACKS AND FLAWS ON THE SURFACE OF SAID BODY, REMOVING EXCESS PENETRANT COMPOSITION FROM THE SURFACE OF SAID TEST BODY, APPLYING A DEVELOPING COMPOSITION CONTAINING AN ABSORBENT POWDER TO SAID TEST BODY, AND INSPECTING SUCH BODY SOLELY UNDER LIGHT WAVES IN THE VISIBLE SPECTRUM HAVING A WAVE LENGTH CORRESPONDING TO THE PREDOMINANT ACTIVATING WAVE LENGTH FOR PRODUCING MAXIMUM FLUORESCENCE OF SAID FLUORESCENT DYE, AND PRODUCING A FLUORESCENT EMISSION FROM SAID FLUORESCENT DYE.
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) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |