US2871697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal flaw detection liquid
Assignee: Individual
•
Filing: 1954-11-08
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Granted: 1959-02-03
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Expires: 1974-11-08
Abstract
No abstract record available.
Inventors
- 👤 Loy W Sockman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:32
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
100 words
IN THE PROCESS OF DETECTING SURFACE-CONNECTED FLAWS IN METAL, THE STEPS OF COATING THE SURFACE OF THE METAL WITH A PENETRANT LIQUID CONTAINING A DYED NON-VOLATILE ESTER WHOSE ACID CONSTITUENT IS A HIGHER FATTY ACID RADICAL AND WHOSE BASE CONSTITUENT IS A SATURATED MONOHYDRIC ALCOHOL RADICAL HAVING FROM 3 TO 5 CARBON ATOMS: ALLOWING THE LIQUID TO STAND ON THE METAL SURFACE FOR A SUFFICIENT TIME TO SPREAD INTO SUFACE CONNECTED DEFECTS, WATER FLUSHING THE SURFACE TO REMOVE EXCESS LIQUID, AND ALLOWING THE LIQUID IN THE FLAWS TO SPREAD OVER THE FLUSHED OFF SURFACE, WHEREBY TO MAKE SAID FLAWS VISIBLE.
Claim 2
Dependent Claim
100 words
IN THE PROCESS OF DETECTING SURFACE-CONNECTED FLAWS IN METAL, THE STEPS OF COATING THE SURFACE OF THE METAL WITH A PENETRANT LIQUID CONTAINING A DYED NON-VOLATILE ESTER WHOSE ACID CONSTITUENT IS A HIGHER FATTY ACID RADICAL AND WHOSE BASE CONSTITUENT IS A SATURATED MONOHYDRIC ALCOHOL RADICAL HAVING FROM 3 TO 5 CARBON ATOMS: ALLOWING THE LIQUID TO STAND ON THE METAL SURFACE FOR A SUFFICIENT TIME TO SPREAD INTO SUFACE CONNECTED DEFECTS, WATER FLUSHING THE SURFACE TO REMOVE EXCESS LIQUID, AND ALLOWING THE LIQUID IN THE FLAWS TO SPREAD OVER THE FLUSHED OFF SURFACE, WHEREBY TO MAKE SAID FLAWS VISIBLE.
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) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |