Patent US2912800A successfully refreshed from Google Patents.
US2912800A
Expired / Lapsed
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Barrelling and tumbling apparatus
Assignee: Rolls Royce PLC
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Filing: 1957-06-10
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Granted: 1959-11-17
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Expires: 1977-06-10
Abstract
No abstract record available.
Inventors
- 👤 Smith-Gorman Robert Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:54
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/02; B24B31/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735226A
Cited
US916437A
Cited
US965813A
Cited
US1269966A
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US1374873A
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US2058257A
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US2274891A
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US2273528A
Cited
US2390011A
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US2427388A
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US2505371A
Cited
US2453278A
Cited
US2727316A
Cited
US2809473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |