Patent US3104734A successfully refreshed from Google Patents.
US3104734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound attenuating gas pipe
Assignee: —
•
Filing: —
•
Granted: 1963-09-24
•
Expires: 1980-09-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:58
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A SOUND ATTENUATING GAS PIPE FOR CONVEYING AND ATTENUATING THE NOISE LEVEL OF A MOVING GAS STREAM, AN OUTER PIPE, AN INNER PIPE CARRIED WITHIN SAID OUTER PIPE AND PRIVIDING A MAIN AXIALLY EXTENDING GAS-FLOW PASSAGE THROUGHOUT ITS LENGTH IN SAID OUTER PIPE, AND MEANS AXIALLY SPACED ALONG AT LEAST ONE OF SAID PIPES AND EXTENDING CIRCUMFERENTIALLY THEREAROUND TO ABUT THE ADJACENT WALL OF THE OTHER PIPE TO FORM THE END WALLS IF A PLURALITY OF AXIALLY SPACED RESONATOR VOLUMES INTERPOSED BETWEEN THE
Claim 2
Dependent Claim
84 words
IN A SOUND ATTENUATING GAS PIPE FOR CONVEYING AND ATTENUATING THE NOISE LEVEL OF A MOVING GAS STREAM, AN OUTER PIPE, AN INNER PIPE CARRIED WITHIN SAID OUTER PIPE AND PRIVIDING A MAIN AXIALLY EXTENDING GAS-FLOW PASSAGE THROUGHOUT ITS LENGTH IN SAID OUTER PIPE, AND MEANS AXIALLY SPACED ALONG AT LEAST ONE OF SAID PIPES AND EXTENDING CIRCUMFERENTIALLY THEREAROUND TO ABUT THE ADJACENT WALL OF THE OTHER PIPE TO FORM THE END WALLS IF A PLURALITY OF AXIALLY SPACED RESONATOR VOLUMES INTERPOSED BETWEEN THE
References Cited (Backward Citations)
US2632521A
Cited
GB334717A
Cited
US2188202A
Cited
US2099858A
Cited
DE638787C
Cited
US2357792A
Cited
US2643731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |