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US1678044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter
Assignee: International Motor Co
•
Filing: 1926-03-08
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Granted: 1928-07-24
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Expires: 1946-03-08
Abstract
No abstract record available.
Inventors
- 👤 Edward R Hewitt
- 👤 Alfred F Masury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:33
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/04; F02M35/06; 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) | 1931-07-24 | 1932-01-23 | 1932-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-07-24 | 1936-01-23 | 1936-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-07-24 | 1940-01-23 | 1940-07-24 | $7700.00 | Window Closed / Lapsed |