US3218822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frozen food display case
Assignee: MCCRAY REFRIGERATOR Co IN
•
Filing: 1964-10-13
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Granted: 1965-11-23
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Expires: 1984-10-13
Abstract
No abstract record available.
Inventors
- 👤 George K Bently
- 👤 Glenn W Mathis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:33
CPC Classifications
A; A47; A47F; A47F3/00; A47F3/04; A47F3/0439; A47F3/0443; A47F3/0447; A47F2003/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A REFRIGERATED DISPLAY CASE HAVING A DOWNWARDLY FLOWING COLD AIR CURTAIN SEPARATING AND PROTECTING SHELFCARRIED REFRIGERATED MERCHANDISE FROM THE DISPLAY ROOM, SAID CASE INCLUDING A BASE HAVING A FRONT WALL AND A RETURN AIR DUCT TERMINATING IN AN INLET ADJACENT THE TOP OF SAID FRONT WALL AND SUBJECT TO THE LOSS OF COLD AIR TO THE ROOM AREA IN FRONT OF SAID BASE, THE IMPROVEMENT COMPRISING HEATING MEANS MOUNTED IN SAID BASE TO DIRECT RADIANT HEAT ENERGY OUTWARDLY INTO THE DISPLAY ROOM AREA NORMALLY RECEIVING THE LOST COLD AIR, AND MEANS TO DIRECT AN UPWARD CONVECTION CURRENT OF AIR HEATED BY SAID HEATING MEANS ACROSS THE FRONT OF SAID BASE TO THE REGION OF SAID RETURN AIR INLET.
Claim 2
Dependent Claim
119 words
IN A REFRIGERATED DISPLAY CASE HAVING A DOWNWARDLY FLOWING COLD AIR CURTAIN SEPARATING AND PROTECTING SHELFCARRIED REFRIGERATED MERCHANDISE FROM THE DISPLAY ROOM, SAID CASE INCLUDING A BASE HAVING A FRONT WALL AND A RETURN AIR DUCT TERMINATING IN AN INLET ADJACENT THE TOP OF SAID FRONT WALL AND SUBJECT TO THE LOSS OF COLD AIR TO THE ROOM AREA IN FRONT OF SAID BASE, THE IMPROVEMENT COMPRISING HEATING MEANS MOUNTED IN SAID BASE TO DIRECT RADIANT HEAT ENERGY OUTWARDLY INTO THE DISPLAY ROOM AREA NORMALLY RECEIVING THE LOST COLD AIR, AND MEANS TO DIRECT AN UPWARD CONVECTION CURRENT OF AIR HEATED BY SAID HEATING MEANS ACROSS THE FRONT OF SAID BASE TO THE REGION OF SAID RETURN AIR INLET.
References Cited (Backward Citations)
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |