US3345858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous chromatographic analysis
Assignee: Universal Oil Products Co
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Filing: 1964-01-28
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Granted: 1967-10-10
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Expires: 1984-01-28
Abstract
No abstract record available.
Inventors
- 👤 Ellsworth R Fenske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:58
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/24; G01N30/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A METHOD FOR ANALYZING A MIXTURE OF FLUID COMPONENTS AT LEAST ONE OF WHICH IS SELECTIVELY SORBED BY CONTACT WITH A SOLID SORBENT AND AT LEAST ONE OTHER COMPONENT IS RELATIVELY LESS SORBED BY THE SORBENT, WHICH COMPRISES PRETREATING A MASS OF SAID SORBENT BY CONTACT WITH SAID SELECTIVELY SORBED COMPONENT UNTIL THE SORBENT IS SUBSTANTIALLY SATURATED WITH RESPECT TO THE SELECTIVELY SORBED COMPONENT, PASSING A CARRIER GAS STREAM THROUGH A SEPARATION ZONE CONTAINING THE PRETREATING SORBENT, INTRODUCING FIXED VOLUME SAMPLES OF SAID MIXTURE AT PERIODIC INTERVALS INTO THE CARRIER GAS STREAM AT A POINT UPSTREAM FROM THE SEPARATION ZONE, PASSING THE EFFLUENT FROM SAID ZONE TO A MEASURING CELL, AND DEVELOPING FROM SAID CELL A SUBSTANTIALLY CONTINUOUS ELEVATED BASELINE SIGNAL, THE MAGNITUDE OF WHICH IS PROPORTIONAL TO THE CONCENTRATION OF SELECTIVELY SORBED COMPONENT IN SAID SAMPLED MIXTURE AND WHICH RESPONDS TO CHANGES IN SAID CONCENTRATION AS BETWEEN A PLURALITY OF THE RESULTING SERIES OF SAMPLES.
Claim 2
Independent Claim
156 words
A METHOD FOR ANALYZING A MIXTURE OF FLUID COMPONENTS AT LEAST ONE OF WHICH IS SELECTIVELY SORBED BY CONTACT WITH A SOLID SORBENT AND AT LEAST ONE OTHER COMPONENT IS RELATIVELY LESS SORBED BY THE SORBENT, WHICH COMPRISES PRETREATING A MASS OF SAID SORBENT BY CONTACT WITH SAID SELECTIVELY SORBED COMPONENT UNTIL THE SORBENT IS SUBSTANTIALLY SATURATED WITH RESPECT TO THE SELECTIVELY SORBED COMPONENT, PASSING A CARRIER GAS STREAM THROUGH A SEPARATION ZONE CONTAINING THE PRETREATING SORBENT, INTRODUCING FIXED VOLUME SAMPLES OF SAID MIXTURE AT PERIODIC INTERVALS INTO THE CARRIER GAS STREAM AT A POINT UPSTREAM FROM THE SEPARATION ZONE, PASSING THE EFFLUENT FROM SAID ZONE TO A MEASURING CELL, AND DEVELOPING FROM SAID CELL A SUBSTANTIALLY CONTINUOUS ELEVATED BASELINE SIGNAL, THE MAGNITUDE OF WHICH IS PROPORTIONAL TO THE CONCENTRATION OF SELECTIVELY SORBED COMPONENT IN SAID SAMPLED MIXTURE AND WHICH RESPONDS TO CHANGES IN SAID CONCENTRATION AS BETWEEN A PLURALITY OF THE RESULTING SERIES OF SAMPLES.
References Cited (Backward Citations)
US2985007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |