Patent US4816646A successfully refreshed from Google Patents.
US4816646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food delivery hot bag with electric hot plate
Assignee: Dominos Pizza Inc
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Filing: 1988-03-21
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Granted: 1989-03-28
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Expires: 2008-03-21
Abstract
Abstract A receptacle for delivering food in a hot condition in the form of a bag formed of insulating material having a closure defined at an end. Within the bag an insert of a high density material capable of retaining heat is located and is heated by an electric resistance heater. Prior to use, the insert mass is heated to the desired temperature and food, such as pizza, placed within the bag will stay warm due to the heat retention of the mass. A plurality of bags are stored in a heated condition so as to be ready for use as needed.
Inventors
- 👤 Harold D. Solomon
- 👤 Wayne R. Greve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:35
CPC Classifications
A; A47; A47J; A47J47/00; A47J47/14; A47J47/145
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
A bag for maintaining freshly baked pizza hot while being delivered comprising, in combination, a thermally insulated rectangular receptacle having a top, a bottom, sides and ends, a closure defining one of said ends positionable between open and closed positions, an insert within said receptacle disposed adjacent said bottom, said insert comprising a high density material hving a rectangular configuration similar to the configuration of said receptacle and including a top and a bottom, a cavity defined in said material bottom, electric resistance heating means located within said cavity, thermal insulating means located between said electric resistance means and said receptacle bottom, and a connectable and disconnectable electric conductor coupling connected to said heating means.
Claim 2
Dependent Claim
115 words
A bag for maintaining freshly baked pizza hot while being delivered comprising, in combination, a thermally insulated rectangular receptacle having a top, a bottom, sides and ends, a closure defining one of said ends positionable between open and closed positions, an insert within said receptacle disposed adjacent said bottom, said insert comprising a high density material hving a rectangular configuration similar to the configuration of said receptacle and including a top and a bottom, a cavity defined in said material bottom, electric resistance heating means located within said cavity, thermal insulating means located between said electric resistance means and said receptacle bottom, and a connectable and disconnectable electric conductor coupling connected to said heating means.
Claim 3
Dependent Claim
15 words
In a bag as in claim 1, said high density material comprising a metallic mass.
Claim 4
Dependent Claim
17 words
In a bag as in claim 1, said high density material comprising a high density nonmetallic material.
Claim 5
Independent Claim
158 words
A system for handling receptacles for delivery of hot, baked pizza comprising, in combination, a plurality of horizontal shelves, a plurality of pizza delivery bags mounted upon said shelves, each of said bags comprising a thermally insulated receptacle having a top, a bottom, sides and ends, a high density mass insert within each of said receptacles, electric resistance heating means incorporated into said insert for heating said insert mass, a plurality of flexible electric conductors each having a first end having a first electrical connector removably connected to one of said heating means and a second end connected to a source of electricity whereby said inserts and bags will be preheated while located upon said shelves and said bags may be individually and selectively removed from said shelves for receiving and delivering pizza upon disconnecting said first electrical connector from its associated heating means, and said preheated mass will maintain the pizza within said bags hot during delivery.
Claim 6
Independent Claim
158 words
A system for handling receptacles for delivery of hot, baked pizza comprising, in combination, a plurality of horizontal shelves, a plurality of pizza delivery bags mounted upon said shelves, each of said bags comprising a thermally insulated receptacle having a top, a bottom, sides and ends, a high density mass insert within each of said receptacles, electric resistance heating means incorporated into said insert for heating said insert mass, a plurality of flexible electric conductors each having a first end having a first electrical connector removably connected to one of said heating means and a second end connected to a source of electricity whereby said inserts and bags will be preheated while located upon said shelves and said bags may be individually and selectively removed from said shelves for receiving and delivering pizza upon disconnecting said first electrical connector from its associated heating means, and said preheated mass will maintain the pizza within said bags hot during delivery.
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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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |