Patent US3211077A successfully refreshed from Google Patents.
US3211077A
Expired / Lapsed
US
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Air curtain
Assignee: Individual
•
Filing: 1961-11-22
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Granted: 1965-10-12
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Expires: 1981-11-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick A Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:51
CPC Classifications
F; F24; F24F; F24F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN AIR CURTAIN DEVICE COMPRISING A HOUSING HAVING TOP, BOTTOM, AND LATERAL SIDE WALLS, A BLOWER SUPPORTED WITHIN THE HOUSING, AN AIR INLET THROUGH A SIDE OF THE HOUSING TO SUPPLY AIR TO THE BLOWER, AN AIR OUTLET THROUGH THE BOTTOM SIDE OF THE HOSUING FOR PERMITTING AIR DISCHARGED FROM THE BLOWER TO PASS FROM THE HOUSING, THE AIR OUTLET HAVING VANES FOR REGULATING THE DIRECTION OF FLOW OF AIR FROM THE HOUSING, AIR PASSAGE MEANS FOR DIRECTING AIR FROM THE BLOWER TO THE AIR OUTLET, MEANS FOR MOUNTING THE HOUSING ABOVE A DOOR OPENING TO A ROOM, AND MEANS ADJACENT THE OUTDOOR SIDE OF THE AIR OUTLET AND MOUNTED IN POSITION TO DIRECT HEAT RAYS DIRECTLY TOWARD THE AIR FLOWING FROM THE HOUSING TO HEAT BOTH THE FLOOR AND AIR.
Claim 2
Dependent Claim
131 words
AN AIR CURTAIN DEVICE COMPRISING A HOUSING HAVING TOP, BOTTOM, AND LATERAL SIDE WALLS, A BLOWER SUPPORTED WITHIN THE HOUSING, AN AIR INLET THROUGH A SIDE OF THE HOUSING TO SUPPLY AIR TO THE BLOWER, AN AIR OUTLET THROUGH THE BOTTOM SIDE OF THE HOSUING FOR PERMITTING AIR DISCHARGED FROM THE BLOWER TO PASS FROM THE HOUSING, THE AIR OUTLET HAVING VANES FOR REGULATING THE DIRECTION OF FLOW OF AIR FROM THE HOUSING, AIR PASSAGE MEANS FOR DIRECTING AIR FROM THE BLOWER TO THE AIR OUTLET, MEANS FOR MOUNTING THE HOUSING ABOVE A DOOR OPENING TO A ROOM, AND MEANS ADJACENT THE OUTDOOR SIDE OF THE AIR OUTLET AND MOUNTED IN POSITION TO DIRECT HEAT RAYS DIRECTLY TOWARD THE AIR FLOWING FROM THE HOUSING TO HEAT BOTH THE FLOOR AND AIR.
References Cited (Backward Citations)
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |