Patent US3859819A successfully refreshed from Google Patents.
US3859819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant containing sandwich storage device
Assignee: Lee Raymond Organization Inc
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Filing: 1973-10-04
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Granted: 1975-01-14
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Expires: 1993-10-04
Abstract
Abstract A device for keeping sandwiches in refrigerator fresh condition which comprises a hollow rectangular parallelpiped body having first and second parallel horizontal walls interconnected by vertical side and end walls, one of the vertical walls including an access door, at least one of the walls being hollow. A chemical refrigerant material fills the hollow wall. The outer portion of the hollow wall is treated to prevent condensation.
Inventors
- 👤 Marx Kaplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:02
CPC Classifications
F; F25; F25D; F25D3/00; F25D2303/00; F25D2303/08; F25D2303/083; F25D2303/0831; F25D2303/084; F25D2303/0844; F25D2331/00; F25D2331/80; F25D2331/804
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A device made to fit in standard size lunch boxes for keeping sandwiches in refrigerated fresh condition, said device comprising: A HOLLOW RECTANGULAR PLASTIC PARALLELEPIPED BODY HAVING FIRST AND SECOND VERTICALLY SPACED PARALLEL HORIZONTAL WALLS INTERCONNECTED BY VERTICAL SIDE AND END WALLS, ONE OF THE VERTICAL WALLS INCLUDING AN ACCESS DOOR, THE UPPER HORIZONTAL WALL BEING HOLLOW AND HAVING AN OUTER PORTION WHICH IS THERMALLY INSULATED; AND A PERMANENT CHEMICAL REFRIGERANT MATERIAL FILLING THE HOLLOW WALL.
Claim 2
Independent Claim
76 words
A device made to fit in standard size lunch boxes for keeping sandwiches in refrigerated fresh condition, said device comprising: A HOLLOW RECTANGULAR PLASTIC PARALLELEPIPED BODY HAVING FIRST AND SECOND VERTICALLY SPACED PARALLEL HORIZONTAL WALLS INTERCONNECTED BY VERTICAL SIDE AND END WALLS, ONE OF THE VERTICAL WALLS INCLUDING AN ACCESS DOOR, THE UPPER HORIZONTAL WALL BEING HOLLOW AND HAVING AN OUTER PORTION WHICH IS THERMALLY INSULATED; AND A PERMANENT CHEMICAL REFRIGERANT MATERIAL FILLING THE HOLLOW WALL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |