US3628311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air purification systems
Assignee: NINO S Inc
•
Filing: 1969-07-07
•
Granted: 1971-12-21
•
Expires: 1989-07-07
Abstract
Abstract A ventilating hood and duct structure for stoves wherein a baffle and water spray arrangement within the hood forces the smoke to pass through successive water curtains. Grease and other impurities are drained from the hood structure through a rectangular trough which overlies the fire area.
Inventors
- 👤 Nino F Costarella
- 👤 Anthony A Giuffre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:25
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; F24C15/2057; B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D45/10; B01D47/00; B01D47/02; B01D47/022; B01D2221/00; B01D2221/02; B05; B05B; B05B14/00; B05B14/40; B05B14/46; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
14 words
The structure of claim 1 wherein said baffle is generally downwardly concave in shape.
Claim 2
Dependent Claim
32 words
The structure of claim 1 wherein said nozzle means includes a plurality of nozzles equally spaced along the length of said hood and directed toward the front wall portion of said hood.
Claim 3
Dependent Claim
42 words
The structure of claim 1 characterized by and including water circulating and impurity separating means for continuously circulating water through said nozzle means, draining water and impurities from said trough, removing impurities from said water, and returning said water to said nozzles.
References Cited (Backward Citations)
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US2546259A
Cited
US2813477A
Cited
US3324629A
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |