US2478951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flaw detection fluid
Assignee: California Research LLC
•
Filing: 1944-05-23
•
Granted: 1949-08-16
•
Expires: 1964-05-23
Abstract
No abstract record available.
Inventors
- 👤 John M Stokely
- 👤 George M Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1188777A
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US1996391A
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US2071482A
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US2259400A
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US2294897A
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US2225866A
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US2340940A
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US2405078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |