US1420665A
Expired / Lapsed
US
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Centrifugal dust separator
Assignee: Individual
•
Filing: 1920-05-10
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Granted: 1922-06-27
•
Expires: 1940-05-10
Abstract
No abstract record available.
Inventors
- 👤 John W Newcombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:23
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/16; A47L9/1658; A47L9/1666; A47L9/1675; A47L5/00; A47L5/12; A47L5/22; A47L5/24; Y; Y10; Y10S; Y10S15/00; Y10S15/08; Y10S55/00; Y10S55/02; Y10S55/03; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49329
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) | 1925-06-26 | 1925-12-26 | 1926-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-06-26 | 1929-12-26 | 1930-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-06-26 | 1933-12-26 | 1934-06-27 | $7700.00 | Window Closed / Lapsed |