Patent US5341504A successfully refreshed from Google Patents.
US2594445A
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Centrifugal machine and process
Assignee: Sharples Corp
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Filing: 1946-10-23
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Granted: 1952-04-29
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Expires: 1966-10-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick W Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:42
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/04; B04B1/08; B04B11/00; B04B11/06; B04B7/00; B04B7/08; B04B7/12; B04B7/16; Y; Y10; Y10S; Y10S494/00; Y10S494/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US544080A
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FR348679A
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US868288A
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US893299A
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US1435545A
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US1362105A
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GB262902A
Cited
US1974692A
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US2228353A
Cited
US2454605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |