Patent US5029217A successfully refreshed from Google Patents.
Patent US3336792A successfully refreshed from Google Patents.
US3336792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of analyzing soil gases
Assignee: Sinclair Research Inc
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Filing: 1964-01-31
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Granted: 1967-08-22
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Expires: 1984-01-31
Abstract
No abstract record available.
Inventors
- 👤 Fay L Boys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:16
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR DETECTING HYDROCARBONS IN SOIL GAS COMPRISING PASSING SOIL GAS THROUGH A CHROMATOGRAPHIC COLUMN IN THE ABSENCE OF CARRIER GAS, SAID COLUMN BEING MAINTAINED AT A TEMPERATURE SUFFICIENTLY LOW TO TRAP SUBSTANTIALLY ALL OF THE HYDROCARBON COMPONENTS OF THE GAS IN THE COLUMN, MEASURING THE QUANTITY OF GAS PASSED THROUGH THE COLUMN DURING SAID TRAPPIN, TERMINATING THE FLOW OF SAMPLE GAS TO THE COLUMN WHEN THE MEASURED QUANTITY OF GAS HAS PASSED THERETHROUGH, PASSING A CARRIER GAS THROUGH THE COLUMN WHILE HEATING THE COLUMN TO A TEMPERATURE SUFFICIENT FOR ELUTION OF THE TRAPPED HYDROCARBONS BY THE CARRIER GAS WHEREBY THE COMPONENTS OF THE TRAPPED HHYDROCARBON GASES ARE SEPARATED, AND DETECTING THE ELUTED HYDROCARBONS.
Claim 2
Dependent Claim
115 words
A PROCESS FOR DETECTING HYDROCARBONS IN SOIL GAS COMPRISING PASSING SOIL GAS THROUGH A CHROMATOGRAPHIC COLUMN IN THE ABSENCE OF CARRIER GAS, SAID COLUMN BEING MAINTAINED AT A TEMPERATURE SUFFICIENTLY LOW TO TRAP SUBSTANTIALLY ALL OF THE HYDROCARBON COMPONENTS OF THE GAS IN THE COLUMN, MEASURING THE QUANTITY OF GAS PASSED THROUGH THE COLUMN DURING SAID TRAPPIN, TERMINATING THE FLOW OF SAMPLE GAS TO THE COLUMN WHEN THE MEASURED QUANTITY OF GAS HAS PASSED THERETHROUGH, PASSING A CARRIER GAS THROUGH THE COLUMN WHILE HEATING THE COLUMN TO A TEMPERATURE SUFFICIENT FOR ELUTION OF THE TRAPPED HYDROCARBONS BY THE CARRIER GAS WHEREBY THE COMPONENTS OF THE TRAPPED HHYDROCARBON GASES ARE SEPARATED, AND DETECTING THE ELUTED HYDROCARBONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |