US3725641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric cup heater
Assignee: Teledyne Isotopes Inc
•
Filing: 1971-08-13
•
Granted: 1973-04-03
•
Expires: 1991-08-13
Abstract
Abstract A metal cup to contain liquid to be heated has a heat distribution plate spot welded or brazed to the exterior of the cup bottom wall and said plate has a perimetral depending flange within which is brazed a heater coil and which has circumferentially spaced extensions providing legs for supporting the cup in an insulated cup-shaped housing, providing simplicity of construction, ease of assembly and economical heat transfer from coil to cup.
Inventors
- 👤 G Tilp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:23
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/24; A47J36/2444; A47J36/2461
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A cup heater comprising a metal cup having a side wall, a bottom wall and an open top for containing a substance to be heated, a metal plate brazed directly on the underside of the bottom wall of the cup in heat transferring contact therewith and having a perimetral depending flange from which depends perimetrally spaced integral legs for mounting the cup, and an electric heater including a metal casing, a heating wire therein and electrical insulating material between said heating wire and said casing, said heater having its metal casing brazed directly on said plate in heat transferring contact with the plate and the inner surface of said flange, said cup, said plate and said electric heater being disposed in an insulating housing, said housing having a side wall, a bottom wall and an open top, the open tops of said housing and said cup are connected by a peripheral flange, and said mounting legs are fastened to the bottom wall of said housing.
Claim 2
Dependent Claim
165 words
A cup heater comprising a metal cup having a side wall, a bottom wall and an open top for containing a substance to be heated, a metal plate brazed directly on the underside of the bottom wall of the cup in heat transferring contact therewith and having a perimetral depending flange from which depends perimetrally spaced integral legs for mounting the cup, and an electric heater including a metal casing, a heating wire therein and electrical insulating material between said heating wire and said casing, said heater having its metal casing brazed directly on said plate in heat transferring contact with the plate and the inner surface of said flange, said cup, said plate and said electric heater being disposed in an insulating housing, said housing having a side wall, a bottom wall and an open top, the open tops of said housing and said cup are connected by a peripheral flange, and said mounting legs are fastened to the bottom wall of said housing.
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |