US3406285A
Expired / Lapsed
US
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Method of inspection of soldered joints comprising using a volatile fluorescent dye
Assignee: Westinghouse Electric Corp
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Filing: 1966-10-19
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Granted: 1968-10-15
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Expires: 1986-10-19
Abstract
No abstract record available.
Inventors
- 👤 Donald G Scorgie
- 👤 Bernard A Kerns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:46
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; C; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF TESTING A SOLDERED JOINT IN A MEMBER COMPRISING THE STEPS OF (1) APPLYING A COATING OF A FLUORESCENT DYE TO THE JOINT TO BE SOLDERED, THE FLUORESCENT DYE BEING RENDERED NON-FLUORESCING WHEN HEATED TO THE SOLDERING TEMPERATURE, (2) HEATING THE MEMBER AT THE JOINT TO SOLDERING TEMPERATURE AND APPLYING SOLDER THERETO, AND (3) INSPECTING THE SOLDERED JOINT WITH A LIGHT CAPABLE OF CAUSING THE ORGINAL FLUORESCENT DYE TO FLUORESCE, WHEREBY A DEFECTIVE SOLDERED JOINT DUE TO THE TEMPERATURES NOT REACHING THE SOLDERING TEMPERATURE IS INDICATED BY FLUORESCENCE OF THE COATING THEREAT.
Claim 2
Independent Claim
94 words
A METHOD OF TESTING A SOLDERED JOINT IN A MEMBER COMPRISING THE STEPS OF (1) APPLYING A COATING OF A FLUORESCENT DYE TO THE JOINT TO BE SOLDERED, THE FLUORESCENT DYE BEING RENDERED NON-FLUORESCING WHEN HEATED TO THE SOLDERING TEMPERATURE, (2) HEATING THE MEMBER AT THE JOINT TO SOLDERING TEMPERATURE AND APPLYING SOLDER THERETO, AND (3) INSPECTING THE SOLDERED JOINT WITH A LIGHT CAPABLE OF CAUSING THE ORGINAL FLUORESCENT DYE TO FLUORESCE, WHEREBY A DEFECTIVE SOLDERED JOINT DUE TO THE TEMPERATURES NOT REACHING THE SOLDERING TEMPERATURE IS INDICATED BY FLUORESCENCE OF THE COATING THEREAT.
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) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |