US1404952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal air cleaner
Assignee: Individual
•
Filing: 1921-01-08
•
Granted: 1922-01-31
•
Expires: 1941-01-08
Abstract
No abstract record available.
Inventors
- 👤 Herman H Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:21
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/022; B; B04; B04C; B04C5/00; B04C5/14; Y; Y10; Y10S; Y10S55/00; Y10S55/28
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) | 1925-01-30 | 1925-08-01 | 1926-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-01-30 | 1929-08-01 | 1930-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-01-30 | 1933-08-01 | 1934-01-31 | $7700.00 | Window Closed / Lapsed |