US2676487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of flaws in rigid articles
Assignee: De Havilland Aircraft Co Ltd
•
Filing: 1950-08-03
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Granted: 1954-04-27
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Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 Clarke Kenneth William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:37
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
76 words
A PROCESS FOR THE DETECTION OF FLAWS IN ARTICLES WHICH HAVE BEEN SUBMITTED TO A MECHANICAL OPERATION, WHICH PROCESS COMPRISES TREATING THE SURFACE OF THE ARTICLE AFTER THE SAID OPERATION WITH A WATER-IN-OIL EMULSION IN WHICH THE CONTINUOUS PHASE IS A WATER-IMMISCIBLE OIL CONTAINING AN EMULSIFYING AGENT, RISING THE EMULSION FROM THE SURFACE OF THE ARTICLE WITH WATER, DRYING THE SURFACE, AND DUSTING THEREON A FINELY-DIVIDED LIGHT COLORED POWDER CONTAINING DISPERSED THEREIN AN OIL-SOLUBLE WATER-INSOLUBLE DYESTUFF.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE DETECTION OF FLAWS IN ARTICLES WHICH HAVE BEEN SUBMITTED TO A MECHANICAL OPERATION, WHICH PROCESS COMPRISES TREATING THE SURFACE OF THE ARTICLE AFTER THE SAID OPERATION WITH A WATER-IN-OIL EMULSION IN WHICH THE CONTINUOUS PHASE IS A WATER-IMMISCIBLE OIL CONTAINING AN EMULSIFYING AGENT, RISING THE EMULSION FROM THE SURFACE OF THE ARTICLE WITH WATER, DRYING THE SURFACE, AND DUSTING THEREON A FINELY-DIVIDED LIGHT COLORED POWDER CONTAINING DISPERSED THEREIN AN OIL-SOLUBLE WATER-INSOLUBLE DYESTUFF.
References Cited (Backward Citations)
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Cited
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US2340940A
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US2359114A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |