Patent US1439151A successfully refreshed from Google Patents.
US1439151A
Expired / Lapsed
US
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Air filter
Assignee: Individual
•
Filing: 1921-10-13
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Granted: 1922-12-19
•
Expires: 1941-10-13
Abstract
No abstract record available.
Inventors
- 👤 Charles E Dailey
- 👤 Samuel C Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:36
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/024; Y; Y10; Y10S; Y10S261/00; Y10S261/72; Y10S55/00; Y10S55/24
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) | 1925-12-18 | 1926-06-19 | 1926-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-18 | 1930-06-19 | 1930-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-18 | 1934-06-19 | 1934-12-19 | $7700.00 | Window Closed / Lapsed |