Patent US2561228A successfully refreshed from Google Patents.
Patent US3354986A successfully refreshed from Google Patents.
US3354986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler with frusto-conical baffle members spaced along central tube
Assignee: JAMES D PARKERSON
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Filing: 1965-07-21
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Granted: 1967-11-28
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Expires: 1985-07-21
Abstract
No abstract record available.
Inventors
- 👤 William A Moss
- 👤 Rose E Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:43
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N1/00; F01N1/08; F01N1/083; F01N13/1844; F01N2450/00; F01N2450/22; F01N2470/00; F01N2470/02; F01N2470/04; F01N2470/20; F01N2490/00; F01N2490/08; F01N2530/00; F01N2530/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A COMPACT MUFFLER COMPRISING AN ELONGATED TUBULAR, IMPERFORATE, CASING DEFINING AN INLET OPENING AND AN OUTLET OPENING ALIGNED THEREWITH, A TUBE EXTENDING SUBSTANTIALLY AXIALLY OF SAID CASING AND HAVING A CLOSED END SPACED WITHIN AND APART FROM SAID OUTLET OPENING, A PLURALITY OF FRUSTO-CONICAL MEMBERS SURROUNDING SAID TUBE AND DEFINING AT LEAST TWO OVERLAPPING EXPANSION CHAMBERS AND ACTING AS BAFFLE MEANS, AT LEAST TWO OF SAID PLURALITY OF MEMBERS BEING SPACED APART INTERMEDIATE SAID OUTLET AND INLET OPENINGS TO DEFINE A FLOW CHAMBER OF LARGER VOLUME THAN EITHER OF SAID EXPANSION CHAMBERS AND ARRANGED IN AXIAL ALIGNMENT THEREWITH, AND APERTURES DEFINED BY SAID MEMBERS AND SAID TUBE TO PROVIDE A GAS FLOW PASSAGEWAY FROM A PORTION OF SAID TUBE ADJACENT SAID INLET OPENING THROUGH SAID EXPANSION CHAMBERS AND SAID FLOW CHAMBER TO SAID OUTLET OPENING.
Claim 2
Dependent Claim
135 words
A COMPACT MUFFLER COMPRISING AN ELONGATED TUBULAR, IMPERFORATE, CASING DEFINING AN INLET OPENING AND AN OUTLET OPENING ALIGNED THEREWITH, A TUBE EXTENDING SUBSTANTIALLY AXIALLY OF SAID CASING AND HAVING A CLOSED END SPACED WITHIN AND APART FROM SAID OUTLET OPENING, A PLURALITY OF FRUSTO-CONICAL MEMBERS SURROUNDING SAID TUBE AND DEFINING AT LEAST TWO OVERLAPPING EXPANSION CHAMBERS AND ACTING AS BAFFLE MEANS, AT LEAST TWO OF SAID PLURALITY OF MEMBERS BEING SPACED APART INTERMEDIATE SAID OUTLET AND INLET OPENINGS TO DEFINE A FLOW CHAMBER OF LARGER VOLUME THAN EITHER OF SAID EXPANSION CHAMBERS AND ARRANGED IN AXIAL ALIGNMENT THEREWITH, AND APERTURES DEFINED BY SAID MEMBERS AND SAID TUBE TO PROVIDE A GAS FLOW PASSAGEWAY FROM A PORTION OF SAID TUBE ADJACENT SAID INLET OPENING THROUGH SAID EXPANSION CHAMBERS AND SAID FLOW CHAMBER TO SAID OUTLET OPENING.
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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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |