US2933148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine muffler
Assignee: Individual
•
Filing: 1957-12-09
•
Granted: 1960-04-19
•
Expires: 1977-12-09
Abstract
No abstract record available.
Inventors
- 👤 Adolph R Hendry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:06
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/004; F01N13/005; F01N1/00; F01N1/16; F01N1/165; F01N1/22; F16; F16L; F16L55/00; F16L55/04; F01N2530/00; F01N2530/22; F01N2590/00; F01N2590/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1468895A
Cited
US1927947A
Cited
US2218063A
Cited
US2372587A
Cited
US2320906A
Cited
DE867333C
Cited
US2877860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |