Patent US2594947A successfully refreshed from Google Patents.
US2594947A
Expired / Lapsed
US
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Magnetic testing apparatus
Assignee: Brush Development Co
•
Filing: 1946-10-30
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Granted: 1952-04-29
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Expires: 1966-10-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:25
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/12; G01R33/14
Claims Analysis
Total Claims: 0
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US2440984A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |