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US3829655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical heating envelopes
Assignee: Individual
•
Filing: 1973-10-04
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Granted: 1974-08-13
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Expires: 1993-10-04
Abstract
Abstract An electrical heating envelope which includes a metallic layer interposed between a vessel, the contants of which are to be heated, and the heating elements which supply the thermal energy. The metallic layer will typically be comprised of non-magnetic material and a layer of resilient insulating material may be positioned between the plate and vessel.
Inventors
- 👤 T Gautier
- 👤 J Thibault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:48
CPC Classifications
H; H05; H05B; H05B3/00; B; B01; B01L; B01L7/00; H05B3/40; H05B3/54; H05B3/58
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
An electrical heating envelope for supporting and heating containers comprising: a thermally insulating housing; reentrant vessel receiving means disposed within said housing and supported thereby, said vessel receiving means including a first member comprised of a heat conductive metal which defines a recess shaped to receive a container to be heated; electrically energized heating means positioned within said housing in contact with a first surface of said first member, said heating means substantially conforming to said first surface, said heating means including a plurality of resistors enclosed in an electrically nonconductive envelope; and an inner member including a layer of thermal insulating fabric material interposed between the second surface of said receiving means first member and a container to be heated whereby containers to be heated are disposed in said recess on said fabric material.
Claim 2
Dependent Claim
135 words
An electrical heating envelope for supporting and heating containers comprising: a thermally insulating housing; reentrant vessel receiving means disposed within said housing and supported thereby, said vessel receiving means including a first member comprised of a heat conductive metal which defines a recess shaped to receive a container to be heated; electrically energized heating means positioned within said housing in contact with a first surface of said first member, said heating means substantially conforming to said first surface, said heating means including a plurality of resistors enclosed in an electrically nonconductive envelope; and an inner member including a layer of thermal insulating fabric material interposed between the second surface of said receiving means first member and a container to be heated whereby containers to be heated are disposed in said recess on said fabric material.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 wherein said vessel receiving means first member is comprised of non-magnetic material.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1 wherein said heating means envelope comprises: thermal insulating fabric.
Claim 5
Dependent Claim
27 words
The apparatus of claim 3 wherein said housing and vessel receiVing means define a void therebetween and wherein said void is filled with a thermal insulating material.
Claim 6
Dependent Claim
17 words
The apparatus of claim 2 wherein said vessel receiving means first member is comprised of non-magnetic material.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |