US2707236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of detecting flaws
Assignee: Magnaflux Corp
•
Filing: 1949-09-09
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Granted: 1955-04-26
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Expires: 1969-09-09
Abstract
No abstract record available.
Inventors
- 👤 Forest Taber De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:39
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
89 words
A METHOD OF DETECTING SURFACE FLAWS, WHICH COMPRISES APPLYING TO A SURFACE A LIQUID PENETRANT CAPABLE OF WETTING THE SURFACE AND OF PENETRATING ANY SURFACE FLAWS PRESENT THEREIN, REMOVING THE LIQUID FROM SAID SURFACE WHILE LEAVING LIQUID IN ANY FLAWS THEREIN, APPLYING TO THE SURFACE A MOBILE INDICATING POWDER, SAID POWDER INCLUDING A COARSELY PULVERULENT CARRIER AND LOOSELY ADHERENT FINER PARTICLES OF A PIGMENT HAVING VISUAL CHARACTERISTICS DIFFERENT FROM THOSE OF SAID SURFACE, AND OBSERVING ANY CONCENTRATION OF PIGMENT ON SAID SURFACE TO DETERMINE THE PRESENCE OF FLAWS THEREIN.
Claim 2
Independent Claim
89 words
A METHOD OF DETECTING SURFACE FLAWS, WHICH COMPRISES APPLYING TO A SURFACE A LIQUID PENETRANT CAPABLE OF WETTING THE SURFACE AND OF PENETRATING ANY SURFACE FLAWS PRESENT THEREIN, REMOVING THE LIQUID FROM SAID SURFACE WHILE LEAVING LIQUID IN ANY FLAWS THEREIN, APPLYING TO THE SURFACE A MOBILE INDICATING POWDER, SAID POWDER INCLUDING A COARSELY PULVERULENT CARRIER AND LOOSELY ADHERENT FINER PARTICLES OF A PIGMENT HAVING VISUAL CHARACTERISTICS DIFFERENT FROM THOSE OF SAID SURFACE, AND OBSERVING ANY CONCENTRATION OF PIGMENT ON SAID SURFACE TO DETERMINE THE PRESENCE OF FLAWS THEREIN.
References Cited (Backward Citations)
US2420646A
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US2254609A
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US2259400A
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US2405078A
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US2478951A
Cited
US2516857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-25 | 1958-10-25 | 1959-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-25 | 1962-10-25 | 1963-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-25 | 1966-10-25 | 1967-04-26 | $7700.00 | Window Closed / Lapsed |