Patent US3930407A successfully refreshed from Google Patents.
US3930407A
Expired / Lapsed
US
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Water-washable inspection penetrant employing mineral solvent and a fatty acid solubility promoter
Assignee: Individual
•
Filing: 1974-01-07
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Granted: 1976-01-06
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Expires: 1994-01-07
Abstract
Abstract Water-washable inspection penetrant compositions which avoid the use of conventional solubilizing detergents. The penetrants comprise an oil vehicle containing a dissolved indicator dye and a fatty acid ingredient dissolved to a concentration within the range of from about 2% to about 25%. The fatty acid ingredient acts as a solubility promoter to permit the penetrant composition to be removed from test surfaces by a spray-wash of water.
Inventors
- 👤 James R. Alburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:53
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; C; C09; C09D; C09D5/00; C09D5/22; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
In a water-washable inspection penetrant process in which a water-dispersible dyed liquid penetrant is applied to test parts, surface penetrant is removed by washing said test parts with water, and said parts are inspected for residual entrapments of penetrant liquid in surface flaws, the improvement wherein said water-washable penetrant consists essentially of the following formulation, stated in weight percentages: Mineral solvent
98% to 75%
Fatty acid 2% to 25% said penetrant vehicle having dissolved therein an indicator dye to a concentration within the range of from about 0.2% up to about 30%.
Claim 2
Dependent Claim
92 words
In a water-washable inspection penetrant process in which a water-dispersible dyed liquid penetrant is applied to test parts, surface penetrant is removed by washing said test parts with water, and said parts are inspected for residual entrapments of penetrant liquid in surface flaws, the improvement wherein said water-washable penetrant consists essentially of the following formulation, stated in weight percentages: Mineral solvent
98% to 75%
Fatty acid 2% to 25% said penetrant vehicle having dissolved therein an indicator dye to a concentration within the range of from about 0.2% up to about 30%.
Claim 3
Dependent Claim
40 words
A process in accordance with claim 1 in which said fatty acid is at least one member selected from the group consisting of: Oleic acid, Soya Alkyd acid, Coconut fatty acid, Palmitic acid, Tall Oil fatty acid, and Naphthenic acid.
Claim 4
Dependent Claim
15 words
A process in accordance with claim 1 in which said fatty acid is Oleic acid.
Claim 5
Dependent Claim
40 words
A process in accordance with claim 1 in which said mineral solvent is a mixture of mineral oils having an aniline point within the range of from about 200° F. down to a mixed aniline point of about 53° F.
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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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |