Patent US3971231A successfully refreshed from Google Patents.
US3971231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerator with dry ice coolant
Assignee: Individual
•
Filing: 1974-03-27
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Granted: 1976-07-27
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Expires: 1994-03-27
Abstract
Abstract A refrigerator incorporates an insulated cabinet having an access opening and a door normally closing said opening with at least one dry ice carrier removably disposed in said cabinet in alignment with said access opening. Said dry ice carrier takes the form of a container having a solid side and a perforated side and of a size and shape enabling the dry ice carrier to be positioned at one side of said insulated cabinet or transversely thereof as desired.
Inventors
- 👤 Juanita Derry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:39
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/12; F25D23/00; F25D23/06; F25D23/069
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
A refrigerator consisting of an insulated cabinet having an access opening and a hinged insulated closure therefor and at least one hollow partition forming a receptacle, dry ice positioned in said receptacle, said hollow partition being positioned in said insulated cabinet and being of a size dividing the interior of said insulated cabinet into two separate areas, said hollow partition having a perforated side and an unperforated side and located in said insulated cabinet so that the perforated side communicates with one of said separate areas to form a freezer and the unperforated side communicates with the other of said separate areas to form a refrigerator.
Claim 2
Dependent Claim
106 words
A refrigerator consisting of an insulated cabinet having an access opening and a hinged insulated closure therefor and at least one hollow partition forming a receptacle, dry ice positioned in said receptacle, said hollow partition being positioned in said insulated cabinet and being of a size dividing the interior of said insulated cabinet into two separate areas, said hollow partition having a perforated side and an unperforated side and located in said insulated cabinet so that the perforated side communicates with one of said separate areas to form a freezer and the unperforated side communicates with the other of said separate areas to form a refrigerator.
Claim 3
Dependent Claim
26 words
The refrigerator set forth in claim 1 and wherein the hollow partition consists of a narrow box with a closure on one of its narrow sides.
Claim 4
Dependent Claim
31 words
The refrigerator set forth in claim 1 and wherein the hollow partition consists of a shallow box with an access opening and closure on one of its top and bottom sides.
Claim 5
Dependent Claim
60 words
The refrigerator set forth in claim 1 and wherein guide rails are formed on the interior of the insulated cabinet from the access opening to the opposite side thereof and in spaced relation to the sides of the insulated cabinet so as to receive the hollow partition in vertical standing position therebetween and in movable relation to the access opening.
Claim 6
Dependent Claim
55 words
The refrigerator set forth in claim 1 and wherein guide rails are formed on the sides of the interior of the insulated cabinet from the access opening to the opposite side thereof and in spaced relation so as to receive the hollow partition in horizontal position therebetween and in movable relation to the access opening.
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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |