Patent US3170385A successfully refreshed from Google Patents.
US3170385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air screen structure components and method of operation
Assignee: NEW CASTLE PRODUCTS Inc
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Filing: 1961-10-18
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Granted: 1965-02-23
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Expires: 1981-10-18
Abstract
No abstract record available.
Inventors
- 👤 Melvin W Tompkins
- 👤 William L Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:57
CPC Classifications
F; F24; F24F; F24F9/00; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN AN AIR SCREEN STRUCTURE WHEREIN A CIRCULATING AIR STREAM ESTABLISHES A BARRIER ACROSS A PASSAGEWAY, SAID STRUCTURE INCLUDING AN OVERHEAD AIR DISCHARGE PLENUM EXTENDING TRANSVERSELY OF SAID PASSAGEWAY AND HAVING AN AIR SCREEN DEFINING DISCHARGE GRATING MEANS FORMING THE BOTTOM WALL THEREOF AND PERMITTING THE INTRODUCTION OF AIR DOWNWARDLY INTO SAID PASSAGEWAY, AN AIR RETURN PLENUM POSITIONED OPPOSITE SAID DISCHARGE GRATING MEANS ACROSS SAID PASSAGEWAY IN THE FLOOR THEREOF, AN AIR CIRCULATING MEANS INTERCONNECTING SAID AIR RETURN AND DISCHARGE PLENUMS AND LOCATED OUT OF SAID PASSAGEWAY, THE IMPROVEMENT COMPRISING THE PROVISION OF AN AIR MIXING CHAMBER FORMING THE UPPER END OF SAID AIR CIRCULATING MEANS AND IN COMMUNICATION WITH SAID DISCHARGE PLENUM, COMBINATION AIR HEATING AND BY-PASS MEANS IN SAID CIRCULATING MEANS BELOW SAID MIXING CHAMBER AND
Claim 2
Dependent Claim
128 words
IN AN AIR SCREEN STRUCTURE WHEREIN A CIRCULATING AIR STREAM ESTABLISHES A BARRIER ACROSS A PASSAGEWAY, SAID STRUCTURE INCLUDING AN OVERHEAD AIR DISCHARGE PLENUM EXTENDING TRANSVERSELY OF SAID PASSAGEWAY AND HAVING AN AIR SCREEN DEFINING DISCHARGE GRATING MEANS FORMING THE BOTTOM WALL THEREOF AND PERMITTING THE INTRODUCTION OF AIR DOWNWARDLY INTO SAID PASSAGEWAY, AN AIR RETURN PLENUM POSITIONED OPPOSITE SAID DISCHARGE GRATING MEANS ACROSS SAID PASSAGEWAY IN THE FLOOR THEREOF, AN AIR CIRCULATING MEANS INTERCONNECTING SAID AIR RETURN AND DISCHARGE PLENUMS AND LOCATED OUT OF SAID PASSAGEWAY, THE IMPROVEMENT COMPRISING THE PROVISION OF AN AIR MIXING CHAMBER FORMING THE UPPER END OF SAID AIR CIRCULATING MEANS AND IN COMMUNICATION WITH SAID DISCHARGE PLENUM, COMBINATION AIR HEATING AND BY-PASS MEANS IN SAID CIRCULATING MEANS BELOW SAID MIXING CHAMBER AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |