Patent US3629888A successfully refreshed from Google Patents.
US3629888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace assembly for thermal analysis use
Assignee: Dow Chemical Co
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Filing: 1969-09-09
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Granted: 1971-12-28
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Expires: 1989-09-09
Abstract
Abstract This invention relates to a heating furnace assembly which is adapted to be coupled to and become a part of a mass spectrometer adjacent to the ion source (usually) within the instrument. The furnace assembly comprises two furnaces in end-to-end relationship with sealing means between the furnaces and means for transmitting gas from one furnace to another. Each furnace is adapted to be controlled by means of temperature sensing which is adapted to be disposed within the furnace assembly.
Inventors
- 👤 Horst G Langer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:27
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/04; H01J49/0468; F; F27; F27D; F27D11/00; F27D11/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A furnace and sample insertion assembly for use under high vacuum conditions, comprising a first furnace and a second furnace, said furnaces being disposed in spaced apart end to end relationship in axial alignment with each other, each of said furnaces having heating means surrounding a central open part which is adapted to receive a generally cylindrical cell structure carrying material which emits gas when heated, valved tubular means sealed between and axially aligned with said furnaces, valved tubular input means coupled to and axially aligned with said first furnace, said first furnace and said second furnace each being enclosed in a gastight enclosure, said valved tubular means passing through each enclosure and said valved tubular input means passing through said enclosure of said first furnace, means for withdrawing gas from said enclosure of said first furnace and means for introducing at least a part of said withdrawn gas to said enclosure for said second furnace.
Claim 2
Dependent Claim
156 words
A furnace and sample insertion assembly for use under high vacuum conditions, comprising a first furnace and a second furnace, said furnaces being disposed in spaced apart end to end relationship in axial alignment with each other, each of said furnaces having heating means surrounding a central open part which is adapted to receive a generally cylindrical cell structure carrying material which emits gas when heated, valved tubular means sealed between and axially aligned with said furnaces, valved tubular input means coupled to and axially aligned with said first furnace, said first furnace and said second furnace each being enclosed in a gastight enclosure, said valved tubular means passing through each enclosure and said valved tubular input means passing through said enclosure of said first furnace, means for withdrawing gas from said enclosure of said first furnace and means for introducing at least a part of said withdrawn gas to said enclosure for said second furnace.
Claim 3
Dependent Claim
25 words
An assembly in accordance with claim 1, wherein said means for withdrawing gas comprises valved tubular means adapted to be coupled to a vacuum system.
Claim 4
Dependent Claim
23 words
An assembly in accordance with claim 1, wherein said means for introducing gas comprises tubular means coupled to said means for withdrawing gas.
Claim 5
Dependent Claim
14 words
An assembly in accordance with claim 1, wherein said furnaces have dissimilar heating means.
References Cited (Backward Citations)
US3431451A
Cited
US3414661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |