US2764556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye solution flaw inspection composition
Assignee: Northrop Grumman Corp
•
Filing: 1953-11-19
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Granted: 1956-09-25
•
Expires: 1973-11-19
Abstract
No abstract record available.
Inventors
- 👤 Loy W Sockman
- 👤 Elliot W Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:28
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
18 words
A PENETRANT SOLUTION FOR APPLICATION TO SURFACES TO INDICATE FINE CRACKS THEREIN, CONSISTING IN PARTS BY VOLUME OF
Claim 2
Dependent Claim
18 words
A PENETRANT SOLUTION FOR APPLICATION TO SURFACES TO INDICATE FINE CRACKS THEREIN, CONSISTING IN PARTS BY VOLUME OF
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |