Patent US3935856A successfully refreshed from Google Patents.
US3935856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe and foot warmer
Assignee: Lee Raymond Organization Inc
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Filing: 1975-01-14
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Granted: 1976-02-03
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Expires: 1995-01-14
Abstract
Abstract A shoe and foot warmer, heated by the combustion of a liquid fuel, which is attached as a cap to cover toe section of a shoe by means of straps and buckles. Control over the combustion process is exerted by means of a valve controlling the amount of fuel vapor admitted into the combustion section of the device.
Inventors
- 👤 Wayne M. Loftin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:48
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/03; A61F7/032; A61F2007/0001; A61F2007/0039; A61F2007/0045; A61F2007/0225; A61F2007/0228
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
A device for warming a shoe to which it is externally mounted comprising A base unit of a size to fit about the toe cap of a shoe with means to attach the base unit to a shoe, A cover hinged to the top section of the base cap, enclosing a heater section fitted in the base unit below the hinged cover.
Claim 2
Independent Claim
62 words
A device for warming a shoe to which it is externally mounted comprising A base unit of a size to fit about the toe cap of a shoe with means to attach the base unit to a shoe, A cover hinged to the top section of the base cap, enclosing a heater section fitted in the base unit below the hinged cover.
Claim 3
Dependent Claim
19 words
The combination as recited in claim 1 in which the heater section comprises a wick mounted above fuel tank.
Claim 4
Dependent Claim
22 words
The combination as recited in claim 2 together with control means to regulate the heat developed in operation of the heater unit.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |