Patent US5259378A successfully refreshed from Google Patents.
Patent US1664092A successfully refreshed from Google Patents.
US1664092A
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Dirt and air separation
Assignee: Individual
•
Filing: 1924-11-01
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Granted: 1928-03-27
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Expires: 1944-11-01
Abstract
No abstract record available.
Inventors
- 👤 Squires John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:56
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/102; A47L5/00; A47L5/12; A47L5/14; A47L5/22; A47L5/28; A47L9/16; A47L9/1658; A47L9/1666; A47L9/1675; Y; Y10; Y10S; Y10S15/00; Y10S15/08; Y10S55/00; Y10S55/03
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) | 1931-03-27 | 1931-09-26 | 1932-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-03-27 | 1935-09-26 | 1936-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-03-27 | 1939-09-26 | 1940-03-27 | $7700.00 | Window Closed / Lapsed |