US3028338A
Expired / Lapsed
US
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Composition for detecting surface discontinuities
Assignee: Switzer Brothers Inc
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Filing: 1958-11-07
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Granted: 1962-04-03
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Expires: 1978-11-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Donald W Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:21
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
67 words
A WATER-BASE PENETRANT FOR DETECTING SURFACE DISCONTINUITES, WHICH CONSISTS ESSENTIALLY OF THE INGREDIENTS NAMED HEREINBELOW IN APPROXIMATELY THE PROPORTIONS BY VOLUME STATED: 2 PARTS WATER 1 PART WETTING AGENT 1 PART OF AN ALKYLENE GLYCOL CONTAINING FROM 2 TO 6 CARBON ATOMS, INCLUSIVE, AND A DYE DISSOLVED THEREIN IN SUFFICIENT AMOUNT TO GIVE A CONTRASTING COLORATION AT A SURFACE DISCONTINUITY AS COMPARED WITH THE SURROUNDING BACKGROUND SURFACE.
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) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |