US3929664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-washable inspection penetrant employing triglycerides and polyglycerides of fatty acids
Assignee: Individual
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Filing: 1974-10-08
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Granted: 1975-12-30
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Expires: 1994-10-08
Abstract
Abstract A water-washable inspection penetrant composition and process in which a low-solubility fatty oil is used as the penetrant vehicle. The solvent liquids of the invention provide enhanced stability of penetrant entrapments in surface flaws, so as to increase the allowable time interval of wash water contact before an excessive depletion of the entrapment occurs. The flaw detecting capability of the water-washable penetrant is thereby improved.
Inventors
- 👤 James R Alburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:24
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 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, STATE IN WEIGHT PERCENTAGES:
Claim 2
Dependent Claim
59 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, STATE IN WEIGHT PERCENTAGES:
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |