US2903085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust muffler
Assignee: JAMES L MATHENY
•
Filing: 1954-07-06
•
Granted: 1959-09-08
•
Expires: 1974-07-06
Abstract
No abstract record available.
Inventors
- 👤 Meral O Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:39
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/089; F01N1/02; F01N2490/00; F01N2490/15; F01N2490/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US779024A
Cited
US1874326A
Cited
US1990837A
Cited
DE685768C
Cited
US2150768A
Cited
US2562101A
Cited
US2730188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |