US3209861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler with two longitudinally separated chambers
Assignee: Walker Manufacturing Co
•
Filing: 1963-10-28
•
Granted: 1965-10-05
•
Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 William C Whitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:43
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/003; F01N1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A HOLLYWOOD TYPE EXHAUST MUFFLER FOR INTERNAL COMBUSTION ENGINES COMPRISING AN OUTER SHELL OF SUBSTANTIALLY UNIFORM CROSS-SECTIONAL AREA THROUGHOUT THE MAJOR PORTION OF ITS LENGTH WITH AN INTERMEDIATE SECTION OF REDUCED CROSS-SECTION, AN INNER TUBE EXTENDING THROUGH SAID OUTER SHELL AND ENGAGED SUBSTANTIALLY AROUND ITS PERIPHERY BY SAID INTERMEDIATE SECTION TO DIVIDE THE SPACE BETWEEN SAID INNER TUBE AND SAID OUTER SHELL INTO TWO LONGITUDINALLY SEPARATED CHAMBERS, SAID INNER TUBE PROVIDING A STRAIGHT THROUGH FLOW PATH THROUGHOUT THE LENGTH OF SAID OUTER SHELL OF SUBSTANTIALLY CONSTANT CROSS-SECTIONAL AREA THROUGH THE MAJOR PORTION OF ITS LENGTH, SAID INNER TUBE HAVING A PLURALITY OF OPENINGS INTO EACH OF SAID CHAMBERS, ONE OF SAID CHAMBERS BEING EMPTY, AND A SOUND ABSORBENT SUBSTANCE FILLING THE OTHER OF SAID CHAMBERS.
Claim 2
Dependent Claim
125 words
A HOLLYWOOD TYPE EXHAUST MUFFLER FOR INTERNAL COMBUSTION ENGINES COMPRISING AN OUTER SHELL OF SUBSTANTIALLY UNIFORM CROSS-SECTIONAL AREA THROUGHOUT THE MAJOR PORTION OF ITS LENGTH WITH AN INTERMEDIATE SECTION OF REDUCED CROSS-SECTION, AN INNER TUBE EXTENDING THROUGH SAID OUTER SHELL AND ENGAGED SUBSTANTIALLY AROUND ITS PERIPHERY BY SAID INTERMEDIATE SECTION TO DIVIDE THE SPACE BETWEEN SAID INNER TUBE AND SAID OUTER SHELL INTO TWO LONGITUDINALLY SEPARATED CHAMBERS, SAID INNER TUBE PROVIDING A STRAIGHT THROUGH FLOW PATH THROUGHOUT THE LENGTH OF SAID OUTER SHELL OF SUBSTANTIALLY CONSTANT CROSS-SECTIONAL AREA THROUGH THE MAJOR PORTION OF ITS LENGTH, SAID INNER TUBE HAVING A PLURALITY OF OPENINGS INTO EACH OF SAID CHAMBERS, ONE OF SAID CHAMBERS BEING EMPTY, AND A SOUND ABSORBENT SUBSTANCE FILLING THE OTHER OF SAID CHAMBERS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |