US3219144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve-like silencer on end of exhaust pipe
Assignee: Individual
•
Filing: 1961-07-06
•
Granted: 1965-11-23
•
Expires: 1981-07-06
Abstract
No abstract record available.
Inventors
- 👤 Murray Ernest
- 👤 Murray Kathleen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/16; F01N1/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
IN COMBINATION, AN EXHAUST PIPE OF AN INTERNAL COMBUSTION ENGINE, A TUBULAR EXTENSION THEREFROM, SPACED LONGITUDINAL RIBS ON THE EXTENSION, A TUBE WITH A CLOSED END SLIDABLY CARRIED ON SAID RIBS, AND SPRING MEANS FOR IMPELLING THE OPEN END OF THE TUBE TOWARD THE EXHAUST PIPE.
Claim 2
Dependent Claim
46 words
IN COMBINATION, AN EXHAUST PIPE OF AN INTERNAL COMBUSTION ENGINE, A TUBULAR EXTENSION THEREFROM, SPACED LONGITUDINAL RIBS ON THE EXTENSION, A TUBE WITH A CLOSED END SLIDABLY CARRIED ON SAID RIBS, AND SPRING MEANS FOR IMPELLING THE OPEN END OF THE TUBE TOWARD THE EXHAUST PIPE.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |