Patent US2330828A successfully refreshed from Google Patents.
US2953530A
Expired / Lapsed
US
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Method and compositions for detecting flaws
Assignee: Switzer Brothers Inc
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Filing: 1955-12-14
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Granted: 1960-09-20
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Expires: 1975-12-14
Abstract
No abstract record available.
Inventors
- 👤 Robert C Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:20
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
41 words
A NORMALLY LIQUID TESTING AGENT COMPOSITION SUITABLE FOR USE IN DETECTING SURFACE DISCONTINUTIES IN TEST BODIES COMPRISING A FLUORESCENT DYE DISSOLVED IN A FLAW PENETRATIVE VEHICLE SELECTED FROM THE CLASS CONSISTING OF LIQUID POLYOXYALKYLENE GLYCOLS AND ALIPHALTIC MONO AND DIETHERS THEREOF.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |