US2853148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust silencer and rain trap
Assignee: Donaldson Co Inc
•
Filing: 1953-06-05
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Granted: 1958-09-23
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Expires: 1973-06-05
Abstract
No abstract record available.
Inventors
- 👤 Leino H Billey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:08
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/20; F01N1/00; F01N1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |