Patent US1884402A successfully refreshed from Google Patents.
Patent US2725950A successfully refreshed from Google Patents.
US2725950A
Expired / Lapsed
US
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Centrifuge furnace
Assignee: TECHNICAL SPECIALTIES Inc
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Filing: 1953-06-17
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Granted: 1955-12-06
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Expires: 1973-06-17
Abstract
No abstract record available.
Inventors
- 👤 Walter M Christiansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:27
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/06; F23G7/061; F23G7/065; F23G5/00; F23G5/08; F23G5/14; F23G5/18; F23G5/32
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) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |