US2820406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise reduction means for air outlet devices
Assignee: CONNOR ENG CORP
•
Filing: 1954-05-14
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Granted: 1958-01-21
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Expires: 1974-05-14
Abstract
No abstract record available.
Inventors
- 👤 Peter A Argentieri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:40
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F13/00; F24F13/02; F24F13/06; F24F13/062; F24F13/24; Y; Y10; Y10S; Y10S454/00; Y10S454/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US701496A
Cited
US1459797A
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US1832741A
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US1938801A
Cited
US1953543A
Cited
US2144631A
Cited
GB610841A
Cited
US2750865A
Cited
US2671395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |