US3904545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dye penetrant composition containing a wax
Assignee: Boeing North American Inc
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Filing: 1973-10-03
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Granted: 1975-09-09
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Expires: 1993-10-03
Abstract
Abstract Dye penetrant for detecting cracks and flaws in the surface of an object containing a wax, for example paraffin wax, a volatile solvent, preferably 1, 1, 1-tri-chloroethane, and a dye which is soluble in the volatile solvent, preferably a fluorescent dye.
Inventors
- 👤 Orlando G Molina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:06
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; C; C09; C09K; C09K11/00; C09K11/06; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
A LIQUID DYE PENETRANT COMPOSITION FOR USE IN NONDESTRUCTIVE TESTING FOR DETECTING CRACKS AND FLAWS IN A SPECIMEN SURFACE, WHICH CONSISTS ESSENTIALLY OF WAX SELECTED FROM THE GROUP CONSISTING OF PARAFFIN WAX, CARNAUBA WAX AND BEESWAX, A DYE, AND ABOUT 50 TO ABOUT 95 PERCENT BY VOLUME OF SAID DYE PENETRANT COMPOSITION, OF A VOLATILE SOLVENT SELECTED FROM THE GROUP CONSISTING OF 1,1,1-TRICHLORETHANE, TRICHLOROETHYLENE, 1,1,2-TRICHLORO-1.2.2-TRIFLUOROETHANE, TRICHLOROFLUOROMETHANE AND BROMOTRIFLUOROMETHANE, SAID WAX WAS BEING COMPATIBLE WITH SAID DYE AND WITH SAID SOLVENT, SAID WAX TOGETHER WITH SAID DYE BEING DISSOLVED IN SAID SOLVENT ON HEATING THEREOF, THE TOTAL AMOUNT OF SAID WAX AND SAID DYE IN SAID COMPOSITION RANGING FROM ABOUT 5 PERCENT TO ABOUT 45 PERCENT, BY VOLUME OF SAID DYE PENETRANT COMPOSITION, THE RATIO OF SAID WAX TO SAID DYE IN SAID COMPOSITION RANGING FROM ABOUT 0.5 PART OF TO ABOUT 5 PARTS OF DYE, TO ABOUT 5 PARTS OF SAID WAS TO ABOUT 1 PART OF DYE, BY VOLUME.
Claim 2
Dependent Claim
160 words
A LIQUID DYE PENETRANT COMPOSITION FOR USE IN NONDESTRUCTIVE TESTING FOR DETECTING CRACKS AND FLAWS IN A SPECIMEN SURFACE, WHICH CONSISTS ESSENTIALLY OF WAX SELECTED FROM THE GROUP CONSISTING OF PARAFFIN WAX, CARNAUBA WAX AND BEESWAX, A DYE, AND ABOUT 50 TO ABOUT 95 PERCENT BY VOLUME OF SAID DYE PENETRANT COMPOSITION, OF A VOLATILE SOLVENT SELECTED FROM THE GROUP CONSISTING OF 1,1,1-TRICHLORETHANE, TRICHLOROETHYLENE, 1,1,2-TRICHLORO-1.2.2-TRIFLUOROETHANE, TRICHLOROFLUOROMETHANE AND BROMOTRIFLUOROMETHANE, SAID WAX WAS BEING COMPATIBLE WITH SAID DYE AND WITH SAID SOLVENT, SAID WAX TOGETHER WITH SAID DYE BEING DISSOLVED IN SAID SOLVENT ON HEATING THEREOF, THE TOTAL AMOUNT OF SAID WAX AND SAID DYE IN SAID COMPOSITION RANGING FROM ABOUT 5 PERCENT TO ABOUT 45 PERCENT, BY VOLUME OF SAID DYE PENETRANT COMPOSITION, THE RATIO OF SAID WAX TO SAID DYE IN SAID COMPOSITION RANGING FROM ABOUT 0.5 PART OF TO ABOUT 5 PARTS OF DYE, TO ABOUT 5 PARTS OF SAID WAS TO ABOUT 1 PART OF DYE, BY VOLUME.
Claim 3
Dependent Claim
17 words
A liquid dye penetrant composition as defined in claim 1, wherein said dye is a fluorescent dye.
Claim 4
Dependent Claim
31 words
A dye penetrant composition as defined in claim 1, said volatile solvent being present in a range of about 60 to about 90 percent by volume of said dye penetrant composition.
Claim 5
Dependent Claim
14 words
A dye penetrant composition as defined in claim 2, said volatile solvent being 1,1,1-trichloroethane.
Claim 6
Dependent Claim
91 words
A dye penetrant composition as defined in claim 2, the total amount of said wax and said dye in said composition ranging from about 10 percent to about 40 percent, and said volatile solvent being present in a range of about 60 to about 90 percent, by volume of said dye penetrant composition, the ratio of said wax to said dye in said composition ranging from about 1 part of wax to about 5 parts of dye, to about 1 part of wax to about 1 part of dye, by volume.
Claim 7
Dependent Claim
30 words
A dye penetrant composition as defined in claim 2, said composition additionally including a water soluble surfactant in an amount ranging from about 2 to about 20 percent by volume.
Claim 8
Dependent Claim
35 words
A dye penetrant composition as defined in claim 4, said wax being paraffin wax, said composition additionally including from about 2 to about 20 percent by volume of a water soluble surfactant containing etheroxygen groups.
Claim 9
Dependent Claim
14 words
A dye penetrant composition as defined in claim 2, said volatile solvent being trichloroethylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |