US4604053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food warming cartridge
Assignee: Individual
•
Filing: 1985-03-25
•
Granted: 1986-08-05
•
Expires: 2005-03-25
Abstract
Abstract A fuel cartridge for heating food trays uses a liquid fuel and a wick. The cartridge has a container that holds the fuel and has a lid with an aperture formed in it. A flat rectangular fiberglass strip serves as the wick and is pressed against the lower side of the aperture. The lower ends of the wick extend into the fuel, and the central portion of the wick protrudes only slightly from the aperture. A metal ring can be used with the container to block wind currents.
Inventors
- 👤 Rudolpho de la Rosa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:45
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/24; F; F23; F23D; F23D3/00; F23D3/02; F23D3/08; F23D3/18; F23D3/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A food warming cartridge with liquid fuel, comprising in combination: a liquid fuel container having a lid with a generally rectangularly shaped aperture therein; a generally rectangularly shaped wick having at least one end submersed in the fuel, a central section of the wick in contact with a lower side of the lid and which blocks the aperture; and retainer means for retaining the wick in contact with the lower side of the lid and holding the central section in a generally flat position parallel with the plane of the lid whereby a side of the central section is exposed so that an exposed side has the shape of the aperture.
Claim 2
Dependent Claim
111 words
A food warming cartridge with liquid fuel, comprising in combination: a liquid fuel container having a lid with a generally rectangularly shaped aperture therein; a generally rectangularly shaped wick having at least one end submersed in the fuel, a central section of the wick in contact with a lower side of the lid and which blocks the aperture; and retainer means for retaining the wick in contact with the lower side of the lid and holding the central section in a generally flat position parallel with the plane of the lid whereby a side of the central section is exposed so that an exposed side has the shape of the aperture.
Claim 3
Dependent Claim
16 words
The cartridge according to claim 1 wherein the wick is formed of fiberglass felt insulation material.
Claim 4
Dependent Claim
29 words
The cartridge according to claim 1 wherein the retainer means compresses a portion of the wick against the lower side of the lid to retain the wick in place.
Claim 5
Dependent Claim
155 words
A food warming cartridge, comprising in combination: a container adapted to hold liquid fuel and having a substantially flat lid with a aperture that has at least two straight sides; a wick having a rectangular transverse cross-section and two depending ends submersed in the fuel, the wick having a central section in contact with the lower side of the lid, blocking the slot, the central section having side edges substantially flush with the sides of the aperture; a plate in contact with the lower side of the central section of the wick, the plate having dimensions substantially as large as the aperture; and securing means for securing the plate to the lower side of the lid in a plane substantially parallel with the lid for pressing a portion of the central section of the wick into a generally flat position coextensive with the dimensions of the aperture and exposed to the exterior of the container.
Claim 6
Dependent Claim
155 words
A food warming cartridge, comprising in combination: a container adapted to hold liquid fuel and having a substantially flat lid with a aperture that has at least two straight sides; a wick having a rectangular transverse cross-section and two depending ends submersed in the fuel, the wick having a central section in contact with the lower side of the lid, blocking the slot, the central section having side edges substantially flush with the sides of the aperture; a plate in contact with the lower side of the central section of the wick, the plate having dimensions substantially as large as the aperture; and securing means for securing the plate to the lower side of the lid in a plane substantially parallel with the lid for pressing a portion of the central section of the wick into a generally flat position coextensive with the dimensions of the aperture and exposed to the exterior of the container.
Claim 7
Dependent Claim
16 words
The cartridge according to claim 4 wherein the wick is formed of fiberglass felt insulation material.
Claim 8
Dependent Claim
33 words
The cartridge according to claim 4 further comprising: an annular cylindrical metal ring having a single perforated sidewall, the ring adapted to rest on the lid, surrounding the wick for blocking wind currents.
Claim 9
Dependent Claim
35 words
The cartridge according to claim 4, wherein the securing means comprises: a pair of depending brackets extending downwardly from opposite sides of the aperture, each bracket having an inwardly extending flange for carrying the plate.
Claim 10
Dependent Claim
129 words
A food warming cartridge, comprising in combination: a cylindrical container having a substantially flat lid formed thereon which has a centrally located aperture, the aperture having at least two parallel sides, the aperture and lid being located substantially in a common plane; a plate mounted to the lid below the aperture a short distance and located in a plane substantially parallel with the lid, providing a clearance, the plate having dimensions substantially coextensive with the aperture; and a wick formed of a rectangular strip of fiber glass felt, the wick pressing tightly through the clearance between the plate and aperture and having side edges substantially flush with the parallel sides of the aperture, the wick having depending ends extending downwardly from opposite sides of the plate into the fuel.
Claim 11
Dependent Claim
129 words
A food warming cartridge, comprising in combination: a cylindrical container having a substantially flat lid formed thereon which has a centrally located aperture, the aperture having at least two parallel sides, the aperture and lid being located substantially in a common plane; a plate mounted to the lid below the aperture a short distance and located in a plane substantially parallel with the lid, providing a clearance, the plate having dimensions substantially coextensive with the aperture; and a wick formed of a rectangular strip of fiber glass felt, the wick pressing tightly through the clearance between the plate and aperture and having side edges substantially flush with the parallel sides of the aperture, the wick having depending ends extending downwardly from opposite sides of the plate into the fuel.
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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) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |