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US3786162A Expired / Lapsed US ⏱️ 0.0 years remaining

Portable kilns

Assignee: Individual
•
Filing: 1971-09-27
•
Granted: 1974-01-15
•
Expires: 1991-09-27
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Abstract

Abstract A relatively light weight portable kiln which may be quickly and easily disassembled, transported and reassembled. The kiln shown comprises: a cylindrical body, an optional body extender, a disk shaped base which engages the body, a similarly shaped lid, a metallic support frame and a controlled source of heat. The cylindrical body, the base and the lid are vacuum formed members composed of alumina-silica, zirconium or other similar fibrous material which is light weight, strong and capable of acting as an insulator and container of heat at temperatures in excess of 2,000* F. The body, the lid and the base are each covered with a stainless steel exterior surface to protect these elements from mechanical damage. The source of controlled heat shown comprises electric elements supported in retaining recesses in the wall of the cylindrical body.

Inventors

  • 👤 F Colson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 19:39
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/02; H; H05; H05B; H05B3/00; H05B3/62; H05B3/64

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 17 words
A portable kiln in accordance with claim 1 wherein said fibrous ceramic material comprises alumina-silica ceramic fibers.
Claim 2
Dependent Claim 17 words
A portable kiln in accordance with claim 1 wherein said fibrous ceramic material comprises zirconium ceramic fibers.
Claim 3
Dependent Claim 62 words
A portable kiln in accordance with claim 1 wherein said body member comprises an open ended cylinder, the ends of said cylinder being recessed at the outer cylindrical surface to form a ring at each end of said body member; and said base member and said lid member are flat circular members and are recessed to receive respective ones of said rings.
Claim 4
Dependent Claim 25 words
A portable kiln in accordance with claim 1 wherein said body member is equipped with peep holes for viewing material being processed in said kiln.
Claim 5
Dependent Claim 60 words
A portable kiln in accordance with claim 4 wherein said cylindrical body has a plurality of recesses in the inner surface of the body, said recesses being spaced apart along the length of said body and concentric therewith, said recesses being adapted to receive and securely hold a plurality of heating elements corresponding in number to said plurality of recesses.
Claim 6
Dependent Claim 149 words
A portable kiln comprising a cylindrical shaped open ended body member, the ends of said cylinder being recessed to form at least one ring at each end of said cylinder; a circular flat base member and a circular flat lid member, said base member and said lid member each provided with circular recesses to provide surfaces which mate with respective ones of said rings to provide a heat seal; said body member being provided with a plurality of circular shaped recesses spaced apart along the length of said body and concentric therewith a plurality of heating elements, said recesses being shaped to receive and hold said plurality of heating elements corresponding in number to said plurality of recesses, means for coupling said heating elements with a source of electric power and means for measuring the temperature within said kiln and for controlling said application of power in response thereto.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-01-14 1977-07-16 1978-01-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-01-14 1981-07-16 1982-01-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-01-14 1985-07-16 1986-01-15 $7700.00 Window Closed / Lapsed

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