US3287557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical absorption cell for gas chromatograph effluent analysis having gas heating means
Assignee: Dow Chemical Co
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Filing: 1964-03-02
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Granted: 1966-11-22
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Arnold M Bartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:38
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/05; G01N30/00; G01N30/02; G01N30/62; G01N30/74; G01N2030/746
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
AN INFRARED ABSORPTION CELL ASSEMBLY FOR USE WITH A SPECTROMETER, COMPRISING AN ELONGATED BAR-LIKE MEMBER HAVING A WALLED SLOT EXTENDING AXIALLY THROUGH IT FROM END TO END, SAID SLOT BEING LONG AS COMPARED WITH ITS MAXIMUM CROSS-SECTIONAL DIMENSION, THE WALLS OF THE SLOT BEING HIGHLY POLISHED, EACH END OF SAID SLOT IN SAID BARLIKE MEMBER HAVING AN INFRARED TRANSMITTING CLOSURE ELEMENT SEALED THERETO, MEANS FOR INTRODUCING FLOWABLE GASLIKE MATERIAL INTO SAID SLOT, MEANS FOR WITHDRAWING A VAPOR SAMPLE FROM SAID SLOT AT A POSITION REMOTE FROM SAID MEANS COMMUNICATING WITH SAID SLOT FOR INTRODUCING FLOWABLE GAS-LIKE MATERIAL, MEANS FOR SEQUENTIALLY APPLYING VAPOR SAMPLES TO AND RETAINING SAID SAMPLES IN SAID SLOT FOR PREDETERMINED TIME INTERVALS AND THEN URGING A PURGE GAS THROUGH SAID SLOT, AND MEANS FOR HEATING SAID BAR-LIKE MEMBER AND SAID MEANS FOR SEQUENTIALLY APPLYING AND RETAINING VAPOR SAMPLES IN SAID SLOT AND FOR URGING A PURGE GAS THROUGH SAID SLOT.
Claim 2
Dependent Claim
153 words
AN INFRARED ABSORPTION CELL ASSEMBLY FOR USE WITH A SPECTROMETER, COMPRISING AN ELONGATED BAR-LIKE MEMBER HAVING A WALLED SLOT EXTENDING AXIALLY THROUGH IT FROM END TO END, SAID SLOT BEING LONG AS COMPARED WITH ITS MAXIMUM CROSS-SECTIONAL DIMENSION, THE WALLS OF THE SLOT BEING HIGHLY POLISHED, EACH END OF SAID SLOT IN SAID BARLIKE MEMBER HAVING AN INFRARED TRANSMITTING CLOSURE ELEMENT SEALED THERETO, MEANS FOR INTRODUCING FLOWABLE GASLIKE MATERIAL INTO SAID SLOT, MEANS FOR WITHDRAWING A VAPOR SAMPLE FROM SAID SLOT AT A POSITION REMOTE FROM SAID MEANS COMMUNICATING WITH SAID SLOT FOR INTRODUCING FLOWABLE GAS-LIKE MATERIAL, MEANS FOR SEQUENTIALLY APPLYING VAPOR SAMPLES TO AND RETAINING SAID SAMPLES IN SAID SLOT FOR PREDETERMINED TIME INTERVALS AND THEN URGING A PURGE GAS THROUGH SAID SLOT, AND MEANS FOR HEATING SAID BAR-LIKE MEMBER AND SAID MEANS FOR SEQUENTIALLY APPLYING AND RETAINING VAPOR SAMPLES IN SAID SLOT AND FOR URGING A PURGE GAS THROUGH SAID SLOT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |