US3309504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for heating chromatographic columns
Assignee: Combustion Engineering Inc
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Filing: 1964-08-24
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Granted: 1967-03-14
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Expires: 1984-08-24
Abstract
No abstract record available.
Inventors
- 👤 John B Rosso
- 👤 Charles R Ferrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:49
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/30; G01N2030/3084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
APPARATUS FOR HEATING A CHROMATOGRAPHIC COLUMN, INCLUDING, AN OVEN ENCLOSURE, AN ELECTRIC HEATING ELEMENT WITHIN THE OVEN, A BLOWER MOUNTED WITHIN THE OVEN IN A POSITION TO MOVE AIR OVER THE HEATING ELEMENT, A MANIFOLD CONDUIT CONNECTED TO THE OVEN ARRANGED TO RECEIVE THE AIR HEATED BY THE ELEMENT, A DUCT CONNECTED TO THE MANIFOLD FOR RECEIVING AT LEAST PART OF THE HEATED AIR OF THE MANIFOLD CONDUIT, A TUBE COUPLING MOUNTED AT THE END OF THE DUCT AND RECEIVING ONE END OF A CHROMATOGRAPHIC COLUMN, A HOUSING OVER THE COUPLING AND DUCT END TO RECEIVE THE HEATED AIR AND PASS IT OVER THE COUPLING, A CONDUIT CONNECTED TO THE HOUSING AND EXTENDING FROM THE COUPLING TO RECEIVE THE HEATED AIR FROM THE DUCT AND CONNECTED TO THE OVEN TO RETURN THE AIR TO THE OVEN, AND A TUBE FOR A SAMPLE TO BE ANALYZED BY THE COLUMN CONNECTED TO THE COLUMN WITH THE COUPLING AND EXTENDING WITHIN AND ALONG THE LENGTH OF THE CONDUIT TO THE OVEN IN CONTACT WITH THE AIR RETURNED TO THE OVEN.
Claim 2
Dependent Claim
177 words
APPARATUS FOR HEATING A CHROMATOGRAPHIC COLUMN, INCLUDING, AN OVEN ENCLOSURE, AN ELECTRIC HEATING ELEMENT WITHIN THE OVEN, A BLOWER MOUNTED WITHIN THE OVEN IN A POSITION TO MOVE AIR OVER THE HEATING ELEMENT, A MANIFOLD CONDUIT CONNECTED TO THE OVEN ARRANGED TO RECEIVE THE AIR HEATED BY THE ELEMENT, A DUCT CONNECTED TO THE MANIFOLD FOR RECEIVING AT LEAST PART OF THE HEATED AIR OF THE MANIFOLD CONDUIT, A TUBE COUPLING MOUNTED AT THE END OF THE DUCT AND RECEIVING ONE END OF A CHROMATOGRAPHIC COLUMN, A HOUSING OVER THE COUPLING AND DUCT END TO RECEIVE THE HEATED AIR AND PASS IT OVER THE COUPLING, A CONDUIT CONNECTED TO THE HOUSING AND EXTENDING FROM THE COUPLING TO RECEIVE THE HEATED AIR FROM THE DUCT AND CONNECTED TO THE OVEN TO RETURN THE AIR TO THE OVEN, AND A TUBE FOR A SAMPLE TO BE ANALYZED BY THE COLUMN CONNECTED TO THE COLUMN WITH THE COUPLING AND EXTENDING WITHIN AND ALONG THE LENGTH OF THE CONDUIT TO THE OVEN IN CONTACT WITH THE AIR RETURNED TO THE OVEN.
References Cited (Backward Citations)
GB971679A
Cited
US3198001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |