Patent US2939811A successfully refreshed from Google Patents.
US2939811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-insulating units for refrigerator cabinets
Assignee: General Electric Co
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Filing: 1957-03-25
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Granted: 1960-06-07
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Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:38
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/246; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; F; F25; F25D; F25D23/00; F25D23/06; F25D2201/00; F25D2201/10; F25D2201/12; F25D2201/124; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S62/00; Y10S62/13; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A HEAT-INSULATING UNIT OF DEFORMABLE PILLOW-LIKE CONSTRUCTION AND ADAPTED TO BE CONFORMED TO THE SPACE DISPOSED BETWEEN THE INNER AND OUTER WALLS OF A REFRIGERATOR CABINET, SAID UNIT COMPRISING AN HERMETICALLY SEALED BAG HAVING DEFORMABLE SHEET-LIKE WALLS OF LOW THERMAL CONDUCTIVITY THAT ARE HIGHLY IMPERVIOUS TO GAS, A DEFORMABLE POROUS MASS OF SOLID HEAT-INSULATING MATERIAL CONFINED WITHIN SAID BAG AND GENERALLY FILLING OUT THE VOLUME THEREOF, AND A CHARGE OF GAS AT SUBSTANTIALLY ATMOSPHERIC PRESSURE CONFINED WITHIN SAID BAG AND COMPLETING THE FILL THEREOF AND THOROUGHLY PERMEATING SAID POROUS MASS OF SOLID HEAT-INSULATING MATERIAL, SAID CHARGE OF GAS HAVING A THERMAL CONDUCTIVITY LOWER THAN THAT OF AIR AND ESSENTIALLY COMPRISING BY WEIGHT ABOUT 15 TO 25 PARTS CARBON DIOXIDE AND ABOUT 75 TO 85 PARTS DICHLORODIFFUOROMETHANE SO THAT THERE IS A SUBSTANTIAL BALANCE BETWEEN THE DIFFUSIONS IN OPPOSITE DIRECTIONS OF CARBON DIOXIDE AND OF AIR THROUGH SAID WALLS AT ATMOSPHERIC PRESSURE.
Claim 2
Dependent Claim
151 words
A HEAT-INSULATING UNIT OF DEFORMABLE PILLOW-LIKE CONSTRUCTION AND ADAPTED TO BE CONFORMED TO THE SPACE DISPOSED BETWEEN THE INNER AND OUTER WALLS OF A REFRIGERATOR CABINET, SAID UNIT COMPRISING AN HERMETICALLY SEALED BAG HAVING DEFORMABLE SHEET-LIKE WALLS OF LOW THERMAL CONDUCTIVITY THAT ARE HIGHLY IMPERVIOUS TO GAS, A DEFORMABLE POROUS MASS OF SOLID HEAT-INSULATING MATERIAL CONFINED WITHIN SAID BAG AND GENERALLY FILLING OUT THE VOLUME THEREOF, AND A CHARGE OF GAS AT SUBSTANTIALLY ATMOSPHERIC PRESSURE CONFINED WITHIN SAID BAG AND COMPLETING THE FILL THEREOF AND THOROUGHLY PERMEATING SAID POROUS MASS OF SOLID HEAT-INSULATING MATERIAL, SAID CHARGE OF GAS HAVING A THERMAL CONDUCTIVITY LOWER THAN THAT OF AIR AND ESSENTIALLY COMPRISING BY WEIGHT ABOUT 15 TO 25 PARTS CARBON DIOXIDE AND ABOUT 75 TO 85 PARTS DICHLORODIFFUOROMETHANE SO THAT THERE IS A SUBSTANTIAL BALANCE BETWEEN THE DIFFUSIONS IN OPPOSITE DIRECTIONS OF CARBON DIOXIDE AND OF AIR THROUGH SAID WALLS AT ATMOSPHERIC PRESSURE.
References Cited (Backward Citations)
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US2649101A
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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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |