Patent US132617A successfully refreshed from Google Patents.
US1747155A
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US
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Separating apparatus and method
Assignee: Individual
•
Filing: 1925-10-15
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Granted: 1930-02-18
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Expires: 1945-10-15
Abstract
No abstract record available.
Inventors
- 👤 Wilfred T Birdsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:28
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0217; B01D17/04; B01D17/041
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) | 1933-02-17 | 1933-08-19 | 1934-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-02-17 | 1937-08-19 | 1938-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-02-17 | 1941-08-19 | 1942-02-18 | $7700.00 | Window Closed / Lapsed |