Patent US3115210A successfully refreshed from Google Patents.
US3115210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine muffler
Assignee: Individual
•
Filing: 1962-04-03
•
Granted: 1963-12-24
•
Expires: 1982-04-03
Abstract
No abstract record available.
Inventors
- 👤 Harold W Birk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:23
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/004; F01N13/005; F01N2530/00; F01N2530/22; F01N2590/00; F01N2590/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A MARINE MUFFLER COMPRISING A RUBBERLIKE TUBULAR INNER SHELL WITH A PERFORATE SIDE WALL, A RUBBERLIKE TUBULAR OUTER SHELL WITH AN IMPERFORATE SIDE WALL DISPOSED ABOUT AND IN SPACED RELATIONSHIP WITH SAID INNER SHELL, AND SIMILAR RIGID FRONT AND REAR HEAD MEMBERS CONNECTED RESPECTIVELY AT OPPOSITE ENDS OF SAID INNER AND OUTER SHELLS AND COOPERATING THEREWITH TO DEFINE A CYLINDRICAL CHAMBER WITHIN SAID INNER SHELL AND AN ANNULAR CHAMBER WITHIN SAID OUTER SHELL AND ABOUT SAID INNER SHELL, SAID CHAMBERS BEING IN COMMUNICATION THROUGH THE PERFORATIONS IN SAID INNER SHELL AND SAID FRONT AND REAR HEAD MEMBERS BEING PROVIDED RESPECTIVELY WITH AN INLET PORT COMMUNICATING WITH SAID CYLINDRICAL CHAMBER AND WITH AN EXHAUST PORT COMMUNICATING WITH SAID ANNULAR CHAMBER.
Claim 2
Dependent Claim
119 words
A MARINE MUFFLER COMPRISING A RUBBERLIKE TUBULAR INNER SHELL WITH A PERFORATE SIDE WALL, A RUBBERLIKE TUBULAR OUTER SHELL WITH AN IMPERFORATE SIDE WALL DISPOSED ABOUT AND IN SPACED RELATIONSHIP WITH SAID INNER SHELL, AND SIMILAR RIGID FRONT AND REAR HEAD MEMBERS CONNECTED RESPECTIVELY AT OPPOSITE ENDS OF SAID INNER AND OUTER SHELLS AND COOPERATING THEREWITH TO DEFINE A CYLINDRICAL CHAMBER WITHIN SAID INNER SHELL AND AN ANNULAR CHAMBER WITHIN SAID OUTER SHELL AND ABOUT SAID INNER SHELL, SAID CHAMBERS BEING IN COMMUNICATION THROUGH THE PERFORATIONS IN SAID INNER SHELL AND SAID FRONT AND REAR HEAD MEMBERS BEING PROVIDED RESPECTIVELY WITH AN INLET PORT COMMUNICATING WITH SAID CYLINDRICAL CHAMBER AND WITH AN EXHAUST PORT COMMUNICATING WITH SAID ANNULAR CHAMBER.
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) | 1966-12-23 | 1967-06-24 | 1967-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-23 | 1971-06-24 | 1971-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-23 | 1975-06-24 | 1975-12-24 | $7700.00 | Window Closed / Lapsed |