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
•
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
2026-11-03 19:30
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)
US2067015A
Cited
US1942162A
Cited
US2649101A
Cited
US2779066A
Cited
US2824364A
Cited
US2817123A
Cited
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 |