US3614859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filter-silencer
Assignee: Ingersoll Rand Co
•
Filing: 1969-11-17
•
Granted: 1971-10-26
•
Expires: 1989-11-17
Abstract
Abstract A GAS FILTER-SILENCER OF LIMITED SIZE WITH A PLURALITY OF CONCENTRIC CHAMBERS HAVING AN INTERPOSITIONED ANNULAR FILTER. THE CHAMBERS OF ONE PAIR THEREOF ARE IN GAS FLOW COMMUNICATION BY WAY OF CHOKE TUBES WHICH ARE STRUCTURALLY AND OPERATIVELY DISPOSED THEREBETWEEN. THE CHOKE TUBES DIVIDE THE FILTERED GAS INTO PARALLEL PATHS, EACH OF WHICH EXTEND MORE THAN HALF THE AXIAL LENGTH OF THE FILTERSILENCER, TO SUPPRESS THE NOISE FREQUENCIES OF THE GAS.
Inventors
- 👤 Billy L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:22
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/14; F02M35/02; F02M35/024; F02M35/02475; F02M35/02483; F02M35/12; F02M35/1205; F02M35/1211; F02M35/1227; Y; Y10; Y10S; Y10S55/00; Y10S55/21
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |