US2578371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for shaving down local protuberances
Assignee: Sir WG Armstrong Whitworth and Co Engineers Ltd
•
Filing: 1948-02-06
•
Granted: 1951-12-11
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Expires: 1968-02-06
Abstract
No abstract record available.
Inventors
- 👤 Plester Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:04
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/38; B21J15/50; B23; B23C; B23C3/00; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/306216; Y10T409/306552; Y10T409/306608
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US497197A
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US1195555A
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US1102856A
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FR542374A
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US1924582A
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GB382175A
Cited
US2282397A
Cited
US2242229A
Cited
US2393463A
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GB571130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |