Patent US3345859A successfully refreshed from Google Patents.
US3345859A
Expired / Lapsed
US
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Chromatographic analysis with automatic baseline compensation
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
2026-11-01 08:36
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/04; G01N30/06; G01N30/86; G01N30/8624; G01N30/8641
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A METHOD FOR ANALYZING A MIXTURE OF FLUID COMPONENTS, AT LAST ONE OF WHICH IS SELECTIVELY SORBED BY CONTACT WITH A SOLID SORBENT AND AT LEAST ONE OTHER COMPONENT IS RELATIVELY LESS SORBENT 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 SAMPLE OF SAID MIXTURE TOGETHER WITH A CARRIER GAS STREAM THROUGH A SEPARATION ZONE CONTAINING THE PRETREATED SORBENT; CONTINUOUSLY ELUTING SELECTIVELY SORBED COMPONENT AND DISCONTINUOUSLY ELUTING LESS SORBED COMPONENT FROM SAID ZONE; PASSING THE EFFUENT FROM SAID ZONE FIRST THROUGH A MEASURING CELL AND THEN AFTER A PREDETERMINED TIME DELAY TO A REFERENCE CELL TO DEVELOP MEASURING AND REFERENCE SIGNALS EACH RESPONSIVE TO CONCENTRATION OF SELECTIVELY SORBED COMPONENT ALONE WHEN LESS SORBED COMPONENT IS ABSENT FROM THE RESPECTIVE CELL AND TO TOTAL CONCENTRATION OF SELECTIVELY SORBED COMPONENT AND LESS SORBED COMPONENT WHEN THE LATTER IS PRESENT IN
Claim 2
Independent Claim
163 words
A METHOD FOR ANALYZING A MIXTURE OF FLUID COMPONENTS, AT LAST ONE OF WHICH IS SELECTIVELY SORBED BY CONTACT WITH A SOLID SORBENT AND AT LEAST ONE OTHER COMPONENT IS RELATIVELY LESS SORBENT 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 SAMPLE OF SAID MIXTURE TOGETHER WITH A CARRIER GAS STREAM THROUGH A SEPARATION ZONE CONTAINING THE PRETREATED SORBENT; CONTINUOUSLY ELUTING SELECTIVELY SORBED COMPONENT AND DISCONTINUOUSLY ELUTING LESS SORBED COMPONENT FROM SAID ZONE; PASSING THE EFFUENT FROM SAID ZONE FIRST THROUGH A MEASURING CELL AND THEN AFTER A PREDETERMINED TIME DELAY TO A REFERENCE CELL TO DEVELOP MEASURING AND REFERENCE SIGNALS EACH RESPONSIVE TO CONCENTRATION OF SELECTIVELY SORBED COMPONENT ALONE WHEN LESS SORBED COMPONENT IS ABSENT FROM THE RESPECTIVE CELL AND TO TOTAL CONCENTRATION OF SELECTIVELY SORBED COMPONENT AND LESS SORBED COMPONENT WHEN THE LATTER IS PRESENT IN
References Cited (Backward Citations)
US2985007A
Cited
US3263488A
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 |