US2730299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coiled tube continuous centrifuge
Assignee: Combined Metals Reduction Co
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Filing: 1953-11-27
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Granted: 1956-01-10
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Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 William H Kelsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:57
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; B04B2005/0457
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |