US3699298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for heating and/or coating articles
Assignee: AT&T Inc
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Filing: 1971-12-23
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Granted: 1972-10-17
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Expires: 1991-12-23
Abstract
Abstract This invention relates to methods and apparatus for heating and/or coating articles and, in particular, to methods and apparatus for epitaxially depositing coatings of semiconductor material onto slices of such material. Accordingly, the general object of this invention is to provide new and improved methods and apparatus of such character.
Inventors
- 👤 Thomas F Briody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:43
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/20; F; F27; F27D; F27D11/00; F27D11/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A hollow cylindrical drum having a plurality of spaced, article-receiving pockets formed at intervals along its internal surface, said drum being constructed of a plurality of rings and a base plate, and of a material susceptible of being inductively heated so that articles placed in the pockets may be heated by conduction through the drum, and the pockets being so arranged that the drum may be rotated about its principal axis to centrifugally force articles against the internal surface of said drum.
Claim 2
Dependent Claim
82 words
A hollow cylindrical drum having a plurality of spaced, article-receiving pockets formed at intervals along its internal surface, said drum being constructed of a plurality of rings and a base plate, and of a material susceptible of being inductively heated so that articles placed in the pockets may be heated by conduction through the drum, and the pockets being so arranged that the drum may be rotated about its principal axis to centrifugally force articles against the internal surface of said drum.
Claim 3
Dependent Claim
10 words
The drum of claim 1, wherein said material is graphite.
Claim 4
Dependent Claim
35 words
The drum of claim 1, wherein the pockets each have a flat surface adapted to contact flat articles, wherein said flat surfaces are inclined at an acute angle to the principal axis of the drum.
Claim 5
Dependent Claim
11 words
The drum of claim 3, wherein said angle is about 3*.
Claim 6
Dependent Claim
22 words
The drum of claim 1, wherein said pockets are oriented in a single row circumferentially about the internal surface of said drum.
Claim 7
Dependent Claim
23 words
The drum of claim 1, wherein said pockets are oriented in a plurality of rows circumferentially about the internal surface of said drum.
Claim 8
Dependent Claim
88 words
Apparatus for heating articles, which comprises: a vertically positioned, hollow, rotatable drum of a plurality of rings and a base plate, and of a heat-conductive material having a plurality of article-receiving pockets formed at intervals along its internal surface, within which articles to be heated are placed; means for rotating said drum about its principal axis so that centrifugal force causes said articles to have more intimate contact with the drum; and means for heating said drum, while rotating, to heat the articles by conduction through the drum.
Claim 9
Dependent Claim
88 words
Apparatus for heating articles, which comprises: a vertically positioned, hollow, rotatable drum of a plurality of rings and a base plate, and of a heat-conductive material having a plurality of article-receiving pockets formed at intervals along its internal surface, within which articles to be heated are placed; means for rotating said drum about its principal axis so that centrifugal force causes said articles to have more intimate contact with the drum; and means for heating said drum, while rotating, to heat the articles by conduction through the drum.
References Cited (Backward Citations)
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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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |