Patent US3734056A successfully refreshed from Google Patents.
US3734056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared spectroscopy apparatus
Assignee: Dow Chemical Co
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Filing: 1970-11-03
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Granted: 1973-05-22
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Expires: 1990-11-03
Abstract
Abstract This invention relates to apparatus for use in isolating monomers of hydrogen-bonded organic compounds, liquids or solids at room temperature in a low temperature inert gas matrix. The apparatus comprises a refrigerated section having an infrared window, a second refrigerated section for pre-cooling the inert matrix gas and for receiving vaporized material to be deposited on the infrared window, the second section having matrix gas nozzles adjacent to a resistance heated sample inserting nozzle entering the second section from an adjacent sample heating and valving section. The nozzle is coupled to a sealed sample container which is inserted in an electrically heated furnace disposed within the second section.
Inventors
- 👤 S King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:13
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/3563; G01N21/3577
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
In analytical apparatus comprising an evacuated chamber having a heat exchanger therein which has an infrared window physically and thermally coupled thereto, a means for directing a pre-cooled Matrix gas towards said window, means for heating a sample to be analyzed, and means including a walled nozzle extending into said chamber for directing heated sample to be analyzed towards said window, the improvement comprising providing a sealed sample holder adapted to be inserted into said means for heating the sample to be analyzed, said sample holder having said nozzle coupled thereto, the nozzle having thin walls which function as an electrical heater, and means for electrically energizing said nozzle across the ends thereof.
Claim 2
Dependent Claim
113 words
In analytical apparatus comprising an evacuated chamber having a heat exchanger therein which has an infrared window physically and thermally coupled thereto, a means for directing a pre-cooled Matrix gas towards said window, means for heating a sample to be analyzed, and means including a walled nozzle extending into said chamber for directing heated sample to be analyzed towards said window, the improvement comprising providing a sealed sample holder adapted to be inserted into said means for heating the sample to be analyzed, said sample holder having said nozzle coupled thereto, the nozzle having thin walls which function as an electrical heater, and means for electrically energizing said nozzle across the ends thereof.
Claim 3
Dependent Claim
16 words
Apparatus in accordance with claim 1, wherein said nozzle is a thin walled stainless steel tube.
Claim 4
Dependent Claim
25 words
Apparatus in accordance with claim 1, wherein said means for heating said sample is a temperature controllable resistance heating oven disposed within said evacuated chamber.
Claim 5
Dependent Claim
49 words
Apparatus in accordance with claim 2, wherein said sample holder is a tubular element having an open end and a closed end, said open end being closed with a cap having said nozzle sealed thereto, said holder being adapted to fit closely but slidably in said means for heating.
Claim 6
Dependent Claim
23 words
Apparatus in accordance with claim 1, wherein heat baffle means are provided between said means for heating and the end of said nozzle.
Claim 7
Dependent Claim
29 words
Apparatus in accordance with claim 5, wherein said baffle means is a plate-like structure which is cooled by said pre-cooled matrix gas and by conduction to a heat sink.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |