Patent US2534420A successfully refreshed from Google Patents.
US2534420A
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Method and apparatus for testing nonmagnetic materials
Assignee: FRANCIS LEROY COOK
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Filing: 1945-04-10
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Granted: 1950-12-19
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Expires: 1965-04-10
Abstract
No abstract record available.
Inventors
- 👤 John J Delaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:27
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1869336A
Cited
US2020067A
Cited
GB368006A
Cited
US1969536A
Cited
US2111210A
Cited
US2269152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |