US2528674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler with inner flexible corrugated conduit
Assignee: Individual
•
Filing: 1948-09-07
•
Granted: 1950-11-07
•
Expires: 1968-09-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:33
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N1/00; F01N1/08; F01N13/009; F01N13/0097; F01N3/00; F01N3/02; F01N3/05; F01N3/08; F01N3/10; F01N3/24; F01N3/26; F01N2230/00; F01N2230/02; F01N2270/00; F01N2270/02; F01N2270/04; F01N2450/00; F01N2450/22; F01N2450/24; F01N2470/00; F01N2470/12; F01N2490/00; F01N2490/02; F01N2490/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |