Patent US2530424A successfully refreshed from Google Patents.
US2530424A
Expired / Lapsed
US
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Lapping machine
Assignee: AC Wickman Ltd
•
Filing: 1947-07-31
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Granted: 1950-11-21
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Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Dickinson Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:40
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/36; B24B5/48; B24B35/00; B24B5/485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US534767A
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US1428209A
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US1714869A
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US1885178A
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US1880729A
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US1826347A
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US1912016A
Cited
GB547572A
Cited
US2372722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |