US2754809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust protector for internal combustion engines
Assignee: Individual
•
Filing: 1953-06-08
•
Granted: 1956-07-17
•
Expires: 1973-06-08
Abstract
No abstract record available.
Inventors
- 👤 Oscar T Hainke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:29
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/1015; F02M35/1017; F02M35/10006; F02M35/10013; F02M35/10091; F02M35/10137; F02B; F02B63/00; F02B63/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172992A
Cited
US2504416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |