US3567394A
Expired / Lapsed
US
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Impurity detector for gaseous streams
Assignee: Universal Oil Products Co
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Filing: 1968-05-16
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Granted: 1971-03-02
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Expires: 1988-05-16
Abstract
Abstract SYSTEM FOR DETERMINING IMPURITY CONCENTRATION IN A GASEOUS ATMOSPHERE. A KNOWN IMPURITY GASEOUS STREAM AND AN UNKNOWN IMPURITY GASEOUS STREAM ARE PASSED THROUGH PARALLED CONVERISION ZONES TO PRODUCT SEPARATE CONVERSION PRODUCT STREAMS. THESE SEPARATE CONVERSION PRODUCT STREAMS ARE PASSED THROUGH DETECTION DEVICES AND THE SIGNAL GENERATED FROM SUCH DEVICES IS QUANTITATIVELY CORRELATED WITH THE IMPURITY CONTENT OF THE UNKNOWN STREAM.
Inventors
- 👤 Erwin C Betz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:20
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0022; G01N33/0024; Y; Y10; Y10T; Y10T436/00; Y10T436/21
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |