Patent US2839042A successfully refreshed from Google Patents.
US2839042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air intake silencer
Assignee: Kiekhaefer Corp
•
Filing: 1955-08-22
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Granted: 1958-06-17
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Expires: 1975-08-22
Abstract
No abstract record available.
Inventors
- 👤 Daniel A Armstrong
- 👤 Lesley J Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:52
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/16; F02M35/165; F02M35/167; F02M35/10; F02M35/1015; F02M35/10196; F02M35/12; F02M35/1205; F02M35/1233; F02B; F02B61/00; F02B61/04; F02B61/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2355208A
Cited
US2701024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |