US3263772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound attenuating gas conduit with one-quarter wave-length side branch chambers
Assignee: Meritor Inc
•
Filing: 1964-06-17
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Granted: 1966-08-02
•
Expires: 1984-06-17
Abstract
No abstract record available.
Inventors
- 👤 Benjamin H Irwin
- 👤 Raymond L Placek
- 👤 Dow Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:55
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/24; F01N1/02; F01N2490/00; F01N2490/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A SOUND ATTENUATING GAS CONDUIT, A PIPE FORMING A MAIN GAS-FLOW PASSAGE, A MEMBER MOUNTED ON THE PIPE AND HAVING PORTIONS THEREOF SPACED FROM THE OUTER FACE OF THE PIPE TO FORM WITH THE OUTER PIPE FACE A CLOSED CAVITY, SAID PIPE HAVING THROAT-FORMING MEANS WITHIN THE EXTENT OF SAID CAVITY WHEREBY SAID THROAT-FORMING MEANS AND CAVITY FORM A SILENCING ELEMENT ACOUSTICALLY CONNECTED TO SAID GAS-FLOW PASSAGE, THE INTERMEDIATE PORTION OF SAID THROAT-FORMING MEANS BEING SPACED FROM ONE END OF SAID PIPE A DISTANCE SUBSTANTIALLY EQUAL TO AN ODD NUMBER MULTIPLE OF THE LENGTH OF SAID CAVITY, AND AN ELONGATED TUBE HAVING ONE OPEN END AND ONCE CLOSED END CARRIED WITHIN SAID PIPE WITHIN AT LEAST A PORTION OF THE AXIAL EXTENT OF SAID THROAT-FORMING MEANS.
Claim 2
Dependent Claim
127 words
IN A SOUND ATTENUATING GAS CONDUIT, A PIPE FORMING A MAIN GAS-FLOW PASSAGE, A MEMBER MOUNTED ON THE PIPE AND HAVING PORTIONS THEREOF SPACED FROM THE OUTER FACE OF THE PIPE TO FORM WITH THE OUTER PIPE FACE A CLOSED CAVITY, SAID PIPE HAVING THROAT-FORMING MEANS WITHIN THE EXTENT OF SAID CAVITY WHEREBY SAID THROAT-FORMING MEANS AND CAVITY FORM A SILENCING ELEMENT ACOUSTICALLY CONNECTED TO SAID GAS-FLOW PASSAGE, THE INTERMEDIATE PORTION OF SAID THROAT-FORMING MEANS BEING SPACED FROM ONE END OF SAID PIPE A DISTANCE SUBSTANTIALLY EQUAL TO AN ODD NUMBER MULTIPLE OF THE LENGTH OF SAID CAVITY, AND AN ELONGATED TUBE HAVING ONE OPEN END AND ONCE CLOSED END CARRIED WITHIN SAID PIPE WITHIN AT LEAST A PORTION OF THE AXIAL EXTENT OF SAID THROAT-FORMING MEANS.
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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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |