Patent US809685A successfully refreshed from Google Patents.
US809685A
Expired / Lapsed
US
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Liner for centrifugal liquid-separators.
Assignee: Individual
•
Filing: 1905-06-09
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Granted: 1906-01-09
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Expires: 1925-06-09
Abstract
No abstract record available.
Inventors
- 👤 Carl Didrik Hellstroem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:02
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/04; B04B1/08; B04B7/00; B04B7/08; B04B7/12; B04B7/14
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) | 1909-01-08 | 1909-07-10 | 1910-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-01-08 | 1913-07-10 | 1914-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-01-08 | 1917-07-10 | 1918-01-09 | $7700.00 | Window Closed / Lapsed |