US3232093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas chromatography apparatus
Assignee: Gulf Research and Development Co
•
Filing: 1962-03-07
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Granted: 1966-02-01
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Expires: 1982-03-07
Abstract
No abstract record available.
Inventors
- 👤 Frank H Burow
- 👤 Ralph O Clark
- 👤 Dean H Lichtenfels
- 👤 James A Petrocelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:33
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
CHROMATOGRAPHIC ANALYTICAL APPARATUS FOR ANALYZING A FLUED MIXTURE, COMPRISING A TUBULAR CHROMATOGRAPHIC SEPARATION COLUMN, ELECTRICAL HEATING MEANS FOR CYCLICALLY GRADUALLY HEATING THE COLUMN AND ITS CONTENTS SUBSTANTIALLY UNIFORMLY AT A SUBSTANTIALLY LINEAR RATE FROM A PREDETERMINED STARTING TEMPERATURE TO A PREDETERMINED FINAL TEMPERATURE, COOLING MEANS FOR CYCLICALLY RAPIDLY COOLING THE COLUMN AND ITS CONTENTS TO THE SAME PREDETERMINED STARTING TEMPERATURE PROMPTLY AFTER EACH HEATING CYCLE, SAID COOLING MEANS COMPRISING A COOLING COLUMN ADACENT THE CHROMATOGRAPHIC SEPARATION COLUMN, A HEAT-EXCHANGE FLUID FOR CIRCULATION THROUGH SAID COOLING COLUMN, AND MEANS FOR CIRCULATING SAID HEAT-EXCHANGE FLUID THROUGH SAID COOLING COLUMN ONLY DURING INTERMITTENT COOLING PHASES AND PERMITING REMOVAL OF SAID HEAT EXCHANGE FLUID DURING OTHER PHASES, REGRIGERATING MEANS FOR COOLING SAID
Claim 2
Dependent Claim
118 words
CHROMATOGRAPHIC ANALYTICAL APPARATUS FOR ANALYZING A FLUED MIXTURE, COMPRISING A TUBULAR CHROMATOGRAPHIC SEPARATION COLUMN, ELECTRICAL HEATING MEANS FOR CYCLICALLY GRADUALLY HEATING THE COLUMN AND ITS CONTENTS SUBSTANTIALLY UNIFORMLY AT A SUBSTANTIALLY LINEAR RATE FROM A PREDETERMINED STARTING TEMPERATURE TO A PREDETERMINED FINAL TEMPERATURE, COOLING MEANS FOR CYCLICALLY RAPIDLY COOLING THE COLUMN AND ITS CONTENTS TO THE SAME PREDETERMINED STARTING TEMPERATURE PROMPTLY AFTER EACH HEATING CYCLE, SAID COOLING MEANS COMPRISING A COOLING COLUMN ADACENT THE CHROMATOGRAPHIC SEPARATION COLUMN, A HEAT-EXCHANGE FLUID FOR CIRCULATION THROUGH SAID COOLING COLUMN, AND MEANS FOR CIRCULATING SAID HEAT-EXCHANGE FLUID THROUGH SAID COOLING COLUMN ONLY DURING INTERMITTENT COOLING PHASES AND PERMITING REMOVAL OF SAID HEAT EXCHANGE FLUID DURING OTHER PHASES, REGRIGERATING MEANS FOR COOLING SAID
References Cited (Backward Citations)
US3097517A
Cited
US3026039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |