Patent US1525808A successfully refreshed from Google Patents.
US1525808A
Expired / Lapsed
US
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Process of centrifugally separating ingrxdients one of which is resistant to flow and centrifugal bowl for carrying out said process
Assignee: De Laval Separator Co
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Filing: 1923-02-15
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Granted: 1925-02-10
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Expires: 1943-02-15
Abstract
No abstract record available.
Inventors
- 👤 Selden H Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:42
CPC Classifications
B; B04; B04B; B04B15/00; B04B15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-02-10 | 1928-08-11 | 1929-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-02-10 | 1932-08-11 | 1933-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-02-10 | 1936-08-11 | 1937-02-10 | $7700.00 | Window Closed / Lapsed |