US4149401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for differential thermal analysis
Assignee: TA Instruments Inc
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Filing: 1978-01-16
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Granted: 1979-04-17
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Expires: 1998-01-16
Abstract
Abstract A furnace which is suitable for carrying out differential thermal analysis of long duration comprises two symmetrical halves having equal heat capacities. Equal sized bores are provided in both halves for a sample container. There are additional bores in the lower half for differential thermoelements. The two halves of the furnace are advantageously provided with filament windings of equal electrical resistance.
Inventors
- 👤 Gunter Hentze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:19
CPC Classifications
G; G01; G01K; G01K3/00; G01K3/08; G01K3/10; G01N; G01N25/00; G01N25/20; G01N25/48; G01N25/4846; G01N25/4866
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
A furnace for long term differential thermal analysis comprising: two symmetrical upper and lower halves having equal heat capacities, each half having two bores, each aligned with a corresponding one in the other half and all of equal size, wherein each set of two aligned bores is provided for receiving a sample container, and additional bores are provided in the lower half for a differential thermoelement.
Claim 2
Dependent Claim
66 words
A furnace for long term differential thermal analysis comprising: two symmetrical upper and lower halves having equal heat capacities, each half having two bores, each aligned with a corresponding one in the other half and all of equal size, wherein each set of two aligned bores is provided for receiving a sample container, and additional bores are provided in the lower half for a differential thermoelement.
Claim 3
Dependent Claim
20 words
A furnace according to claim 1, wherein the two halves of the furnace have filament windings of equal electrical resistance.
Claim 4
Dependent Claim
21 words
A furnace according to claim 2, wherein the filament windings are disposed in the outer peripheral portion of the furnace halves.
Claim 5
Dependent Claim
21 words
A furnace according to claim 2, wherein the halves are cylindrical and the filament windings are disposed around the circumferential portion.
Claim 6
Dependent Claim
27 words
A furnace according to claim 1, wherein each additional bore is dispersed concentrically with and below one bore in the lower half and has a smaller diameter.
References Cited (Backward Citations)
US3208282A
Cited
US3535913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |