US5280177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample cell for infrared spectrophotometry
Assignee: National Institute of Standards and Technology
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Filing: 1992-10-15
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Granted: 1994-01-18
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Expires: 2012-10-15
Abstract
Abstract A sample cell for infrared spectrophotometry comprises a sample holder for holding a sample to be analyzed by infrared spectrophotometry, a cool air passageway and a vortex tube. The sample holder includes a primary optical surface through which infrared radiation is directed to a sample contained in the holder, and the cool air passageway is adjacent the primary optical surface of the sample holder for directing a cool air stream across the primary optical surface. The vortex tube has a cool air outlet connected to the cool air passageway for supplying cool air to the passageway.
Inventors
- 👤 Thomas J. Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:53
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/0332; G01N30/00; G01N30/02; G01N30/62; G01N30/74; G01N2030/746
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
87 words
A sample cell for infrared spectrophotometry, comprising a sample holder for holding a sample to be analyzed by infrared spectrophotometry, the sample holder including a primary optical surface through which infrared radiation is directed to a sample contained in the holder, a cool air passageway adjacent the primary optical surface of the sample holder for directing a cool air stream across the primary optical surface, and a vortex tube having a cool air outlet connected to the cool air passageway for supplying cool air to the passageway.
Claim 2
Dependent Claim
87 words
A sample cell for infrared spectrophotometry, comprising a sample holder for holding a sample to be analyzed by infrared spectrophotometry, the sample holder including a primary optical surface through which infrared radiation is directed to a sample contained in the holder, a cool air passageway adjacent the primary optical surface of the sample holder for directing a cool air stream across the primary optical surface, and a vortex tube having a cool air outlet connected to the cool air passageway for supplying cool air to the passageway.
Claim 3
Dependent Claim
43 words
A sample cell as defined by claim 1, wherein the sample holder comprises a pair of salt plates arranged in spaced relation to one another with a fluid tight spacer therebetween, and wherein one of the salt plates is the primary optical surface.
Claim 4
Dependent Claim
17 words
A sample cell as defined by claim 2, wherein the sample holder further comprises a sample inlet.
Claim 5
Dependent Claim
31 words
A sample cell as defined by claim 1, wherein the cool air passageway includes a salt plate through which infrared radiation passes to the primary optical surface of the sample holder.
Claim 6
Dependent Claim
27 words
A sample cell as defined by claim 1, wherein the cool air passageway extends along sides of the sample holder which are adjacent the primary optical surface.
Claim 7
Dependent Claim
22 words
A sample cell as defined by claim 1, wherein the cool air passageway extends along the entire perimeter of the sample holder.
Claim 8
Dependent Claim
30 words
A sample cell as defined by claim 1, wherein the cool air passageway includes an air inlet connected with the cool air outlet of the vortex, and an air outlet.
Claim 9
Dependent Claim
20 words
A sample cell as defined by claim 1, wherein the vortex tube is supplied with a compressed air inlet stream.
Claim 10
Dependent Claim
20 words
A sample cell as defined by claim 1, further including a temperature measuring means arranged in the cool air passageway.
Claim 11
Dependent Claim
19 words
A sample cell as defined by claim 1, further including a temperature measuring means arranged in the sample holder.
Claim 12
Dependent Claim
122 words
An infrared spectrophotometer, including a sample cell, means for directing infrared radiation to a sample contained in the sample cell, and means for measuring spectra resulting from infrared irradiation of a sample contained in the sample cell, wherein the sample cell comprises a sample holder for holding a sample to be analyzed by infrared spectrophotometry, the sample holder including a primary optical surface through which infrared radiation is directed to a sample contained in the holder, a cool air passageway adjacent the primary optical surface of the sample holder for directing a cool air stream across the primary optical surface, and a vortex tube having a cool air outlet connected to the cool air passageway for supplying cool air to the passageway.
Claim 13
Dependent Claim
122 words
An infrared spectrophotometer, including a sample cell, means for directing infrared radiation to a sample contained in the sample cell, and means for measuring spectra resulting from infrared irradiation of a sample contained in the sample cell, wherein the sample cell comprises a sample holder for holding a sample to be analyzed by infrared spectrophotometry, the sample holder including a primary optical surface through which infrared radiation is directed to a sample contained in the holder, a cool air passageway adjacent the primary optical surface of the sample holder for directing a cool air stream across the primary optical surface, and a vortex tube having a cool air outlet connected to the cool air passageway for supplying cool air to the passageway.
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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) | 1997-01-17 | 1997-07-19 | 1998-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-17 | 2001-07-19 | 2002-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-17 | 2005-07-19 | 2006-01-18 | $7700.00 | Window Closed / Lapsed |