US3560399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activated developer and method of flaw detection
Assignee: Day Glo Color Corp
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Filing: 1965-10-24
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Granted: 1971-02-02
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Expires: 1985-10-24
Abstract
Abstract SENSITIVITY OF POWDER-DEVELOPED PENETRANT SYSTEM OF FLAW DETECTION INCREASED BY PARTIALLY PRE-WETTING OF POWDERED DEVELOPER WITH SOLVATOR FOR FLAW-INDICATING DYE. THE PRESENCE OF SOLVATOR FOR THE DYE PROVIDES THE OPTION OF CARRYING (OR NOT CARRYING) AT LEAST SOME OF AT LEAST ONE OF WHAT WOULD OTHERWISE BE A COMPONENT OF A FLAW PENETRANT LIQUID, SUCH AS ONE OR MORE FLAW-INDICATING DYES.
Inventors
- 👤 John E Irsak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:19
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; C; C09; C09K; C09K11/00; C09K11/06; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |