Patent US3329005A successfully refreshed from Google Patents.
US3329005A
Expired / Lapsed
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Detection method and apparatus for gas chromatography
Assignee: HP Inc
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Filing: 1964-02-03
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Granted: 1967-07-04
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Expires: 1984-02-03
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Levy
- 👤 Donald G Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:29
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/86; G01N30/8624
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A GAS CHROMATOGRAPH HAVING A SEPARATING COLUMN AND A DETECTOR FOR PROVIDING AN OUTPUT ELECTRICAL SIGNAL WHOSE AMPLITUDE VARIES IN ACCORDANCE WITH THE COMPOSITION OF THE EFFLUENT FROM THE COLUMN, SAID COLUMN HAVING A LIQUID PHASE WHICH VOLATILIZES AS A FUNCTION OF COLUMN TEMPERATURE THEREBY PRODUCING UNWANTED VARIATIONS IN THE DETECTOR OUTPUT SIGNAL AMPLITUDE, THE COMBINATION OF MEANS FOR GENERATING AN ELECTRICAL COMPENSATING SIGNAL HAVING AN AMPLITUDE THAT VARIES AS A FUNCTION OF TEMPERATURE IN SUBSTANTIALLY THE SAME MANNER AS THE TEMPERATUREPRODUCED AMPLITUDE VARIATIONS IN SAID DETECTOR OUTPUT SIGNAL, MEANS FOR COMBINING SAID COMPENSATING SIGNAL AND SAID DETECTOR OUTPUT SIGNAL THEREBY TO PRODUCE A COMPENSATED DETECTOR OUTPUT SIGNAL SUBSTANTIALLY FREE FROM THE UNWANTED VARIATIONS, AND MEANS FOR VARYING THE AMPLITUDE OF SAID COMPENSATING SIGNAL BY A FACTOR OF LESS THAN ONE WHEN THE COMPENSATING SIGNAL AMPLITUDE OBTAINS A PREDETERMINED RELATIONSHIP TO THAT OF THE DETECTOR OUTPUT SIGNALS.
Claim 2
Dependent Claim
148 words
IN A GAS CHROMATOGRAPH HAVING A SEPARATING COLUMN AND A DETECTOR FOR PROVIDING AN OUTPUT ELECTRICAL SIGNAL WHOSE AMPLITUDE VARIES IN ACCORDANCE WITH THE COMPOSITION OF THE EFFLUENT FROM THE COLUMN, SAID COLUMN HAVING A LIQUID PHASE WHICH VOLATILIZES AS A FUNCTION OF COLUMN TEMPERATURE THEREBY PRODUCING UNWANTED VARIATIONS IN THE DETECTOR OUTPUT SIGNAL AMPLITUDE, THE COMBINATION OF MEANS FOR GENERATING AN ELECTRICAL COMPENSATING SIGNAL HAVING AN AMPLITUDE THAT VARIES AS A FUNCTION OF TEMPERATURE IN SUBSTANTIALLY THE SAME MANNER AS THE TEMPERATUREPRODUCED AMPLITUDE VARIATIONS IN SAID DETECTOR OUTPUT SIGNAL, MEANS FOR COMBINING SAID COMPENSATING SIGNAL AND SAID DETECTOR OUTPUT SIGNAL THEREBY TO PRODUCE A COMPENSATED DETECTOR OUTPUT SIGNAL SUBSTANTIALLY FREE FROM THE UNWANTED VARIATIONS, AND MEANS FOR VARYING THE AMPLITUDE OF SAID COMPENSATING SIGNAL BY A FACTOR OF LESS THAN ONE WHEN THE COMPENSATING SIGNAL AMPLITUDE OBTAINS A PREDETERMINED RELATIONSHIP TO THAT OF THE DETECTOR OUTPUT SIGNALS.
References Cited (Backward Citations)
US2257847A
Cited
US3228230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |