US3356458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatographic analysis
Assignee: Shell USA Inc
•
Filing: 1965-09-13
•
Granted: 1967-12-05
•
Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 Shelton E Steinle
- 👤 William B Milligan
- 👤 Comendant Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:40
CPC Classifications
G; G01; G01N; G01N30/00; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/176152; Y10T436/18; Y10T436/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF ANALYZING A FLUID TO DETERMINE THE CONCENTRATIONS OF THE CONSTITUENTS OF SAID FLUID COMPRISING: INJECTING A KNOWN VOLUME OF THE FLUID INTO A STREAM OF A FIRST CARRIER GAS WHICH IS SUBSTANTIALLY FREE OF THE CONSTITUENT TO BE DETECTED; PASSING THE CARRIER GAS AND THE VOLUME OF FLUID INTO A ZONE CONTAINING A MATERIAL WHICH SELECTEIVELY RETARDS THE PASSAGE THEREGHROUGH OF THE CONSTITUENTS OF SAID FLUID AND SAID FIRST CARRIER GAS AND WHICH COMPLETELY ABSORBS SAID FLUID AND SAID FIRST CARRIER GAS; TERMINATING THE FLOW OF SAID STREAM OF SAID FIRST CARRIER GAS AFTER SAID VOLUME OF FLUID HAS COMPLETELY PASSED INTO SAID ZONE AND BEFORE SAID ZONE IS COMPLETELY FULL; PASSING A STREAM OF A SECOND CARRIER GAS, WHICH IS LESS ADSORBED BY SAID MATERIAL THAN THE CONSTITUENT TO BE DETECTED, THROUGH SAID ZONE; AND MEASURING THE EFFLUENT FROM SAID ZONE WITH A CHROMATOGRAPHIC ANALYZER TO DETECT THE PARTICULAR CONSTITUENT DESIRED.
Claim 2
Independent Claim
155 words
THE METHOD OF ANALYZING A FLUID TO DETERMINE THE CONCENTRATIONS OF THE CONSTITUENTS OF SAID FLUID COMPRISING: INJECTING A KNOWN VOLUME OF THE FLUID INTO A STREAM OF A FIRST CARRIER GAS WHICH IS SUBSTANTIALLY FREE OF THE CONSTITUENT TO BE DETECTED; PASSING THE CARRIER GAS AND THE VOLUME OF FLUID INTO A ZONE CONTAINING A MATERIAL WHICH SELECTEIVELY RETARDS THE PASSAGE THEREGHROUGH OF THE CONSTITUENTS OF SAID FLUID AND SAID FIRST CARRIER GAS AND WHICH COMPLETELY ABSORBS SAID FLUID AND SAID FIRST CARRIER GAS; TERMINATING THE FLOW OF SAID STREAM OF SAID FIRST CARRIER GAS AFTER SAID VOLUME OF FLUID HAS COMPLETELY PASSED INTO SAID ZONE AND BEFORE SAID ZONE IS COMPLETELY FULL; PASSING A STREAM OF A SECOND CARRIER GAS, WHICH IS LESS ADSORBED BY SAID MATERIAL THAN THE CONSTITUENT TO BE DETECTED, THROUGH SAID ZONE; AND MEASURING THE EFFLUENT FROM SAID ZONE WITH A CHROMATOGRAPHIC ANALYZER TO DETECT THE PARTICULAR CONSTITUENT DESIRED.
References Cited (Backward Citations)
US3304159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |