US2520756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust silencer for internalcombustion engines
Assignee: Nelson Muffler Corp
•
Filing: 1945-12-03
•
Granted: 1950-08-29
•
Expires: 1965-12-03
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/02; F01N1/00; F01N1/003; F01N1/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1447688A
Cited
US1739039A
Cited
US2114725A
Cited
US2182204A
Cited
US2194550A
Cited
US2186062A
Cited
US2150768A
Cited
US2235705A
Cited
US2357791A
Cited
US2382159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |