US3104733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ludlow
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
2026-10-27 23:23
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A SOUND ATTENUATING GAS PIPE FOR CONVEYING AND ATTENUATING THE NOISE LEVEL OF A MOVING GAS STREAM, AN OUTER PIPE, A PLUALITY OF INTERFITTING, AXIALLY EXTENDING, OPEN-ENDED INSERTS CARRIED IN THE OUTER PIPE AND DEFINING A MAIN GAS-FLOW PASSAGE, THE AXIALLY EXTENDING WALLS OF SAID INSERTS BEING SPACED FROM SAID OUTER PIPE AND ACTING IN COMBINATION WITH SAID OUTER PIPE AND MEANS SUPPORTING SAID AXIALLY EXTENDING WALLS IN SPACED RELATION TO SAID OUTER
Claim 2
Dependent Claim
74 words
IN A SOUND ATTENUATING GAS PIPE FOR CONVEYING AND ATTENUATING THE NOISE LEVEL OF A MOVING GAS STREAM, AN OUTER PIPE, A PLUALITY OF INTERFITTING, AXIALLY EXTENDING, OPEN-ENDED INSERTS CARRIED IN THE OUTER PIPE AND DEFINING A MAIN GAS-FLOW PASSAGE, THE AXIALLY EXTENDING WALLS OF SAID INSERTS BEING SPACED FROM SAID OUTER PIPE AND ACTING IN COMBINATION WITH SAID OUTER PIPE AND MEANS SUPPORTING SAID AXIALLY EXTENDING WALLS IN SPACED RELATION TO SAID OUTER
References Cited (Backward Citations)
GB334717A
Cited
US2034186A
Cited
US2188202A
Cited
US2099858A
Cited
DE638787C
Cited
US2357792A
Cited
US2855068A
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 |