US3276540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for attenuating sound waves in gas streams and method of producing same
Assignee: APX GROUP Inc
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Filing: 1964-09-14
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Granted: 1966-10-04
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Expires: 1984-09-14
Abstract
No abstract record available.
Inventors
- 👤 Glenn R Crouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:46
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N13/185; F01N1/00; F01N1/003; F01N13/009; F01N2450/00; F01N2450/20; F01N2470/00; F01N2470/02; F01N2470/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49398
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
APPARATUS OF THE CHARACTER DISCLOSED INCLUDING, IN COMBINATION, AN INNER TUBULAR SHELL, AN OUTER TUBULAR SHELL OF LARGER DIAMETER SURRONDING SAID INNER TUBULAR SHELL, AN INTERMEDIATE TUBULAR SHELL DISPOSED BETWEEN THE INNER AND OUTER SHELLS AND SPACED THEREFROM, SAID INTERMEDIATE SHELL HAVING LENGTHWISE SPACED INTEGRAL CIRCUMFERENTIAL PORTIONS ENGAGING THE INNER SHELL AND THE OUTER SHELL RETAINING THE SHELLS IN ASSEMBLED RELATION AND PROVIDING ANNULAR CHAMBERS BETWEEN THE INNER AND INTERMEDIATE SHELLS AND BETWEEN THE INTERMEDIATE AND OUTER SHELLS.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |