Patent US4543471A successfully refreshed from Google Patents.
US4543471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled temperature food carrier
Assignee: TEMP TECH Inc SPRINGFIELD MA A CORP OF MA
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Filing: 1983-05-25
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Granted: 1985-09-24
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Expires: 2003-05-25
Abstract
Abstract A portable controlled temperature food carrier is presented wherein independent heating and cooling temperature control units are freely interchangeable depending upon desired use. The individual temperature control units are easily removable from the carrier housing to facilitate replacement, cleaning and/or changeover from a heating to a cooling mode.
Inventors
- 👤 John W. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:06
CPC Classifications
A; A47; A47J; A47J39/00; A47J39/02; A47J41/00; A47J41/0038; A47J41/005; A47J2202/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
A controlled temperature food carrier for carrying a plurality of meals comprising a walled housing having a bottom and an open top, a removable lid for opening and closing said top, said housing having a front wall, a portion of said front wall of said housing having an opening therein adjacent the bottom of said housing, said opening being sized to preclude simultaneous removal of all of said meals thereby limiting heat loss from within said housing, temperature control means removably disposed in said housing through said opening in said front wall, and a movable door disposed on said front wall for opening and closing said opening therein for the removal of meals from said housing.
Claim 2
Dependent Claim
116 words
A controlled temperature food carrier for carrying a plurality of meals comprising a walled housing having a bottom and an open top, a removable lid for opening and closing said top, said housing having a front wall, a portion of said front wall of said housing having an opening therein adjacent the bottom of said housing, said opening being sized to preclude simultaneous removal of all of said meals thereby limiting heat loss from within said housing, temperature control means removably disposed in said housing through said opening in said front wall, and a movable door disposed on said front wall for opening and closing said opening therein for the removal of meals from said housing.
Claim 3
Dependent Claim
38 words
The food carrier of claim 1 wherein said housing and said lid are of double-wall construction each of said double walls having a space therebetween, and wherein said space between said double walls is filled with insulating material.
Claim 4
Dependent Claim
17 words
The food carrier of claim 1 wherein said temperature control means is electrically powered by AC current.
Claim 5
Dependent Claim
17 words
The food carrier of claim 1 wherein said temperature control means is electrically powered by DC current.
Claim 6
Dependent Claim
18 words
The food carrier of claim 1 wherein means is provided for measuring the temperature inside of said housing.
Claim 7
Dependent Claim
24 words
The food carrier of claim 5 wherein said temperature measuring means provides visual indication of said inside temperature on the outside of said housing.
References Cited (Backward Citations)
US1661464A
Cited
US1766525A
Cited
US1934446A
Cited
US2251582A
Cited
US2577870A
Cited
US2543524A
Cited
GB660759A
Cited
US2675457A
Cited
US2576874A
Cited
US2658986A
Cited
US2919339A
Cited
US3074394A
Cited
US3129317A
Cited
US3549861A
Cited
US3760155A
Cited
US3714394A
Cited
US3808401A
Cited
US4037081A
Cited
US4198559A
Cited
US4206343A
Cited
US4420678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |