US3574549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microanalyzer for thermal studies
Assignee: Shell USA Inc
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Filing: 1967-02-20
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Granted: 1971-04-13
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Expires: 1987-02-20
Abstract
Abstract A HIGHLY SENSITIVE MICROANALYZER FOR DETERMINING THE THERMAL STABILITY, VAPOR PRESSURE, VOLATILE CONTENT OF SAMPLES, AND THE HYDROCARBON YIELD VERSUS TEMPERATURE PATTERN OF OIL SHALES AND OTHER ORGANIC-BEARING SAMPLES. THE INSTRUMENT CONSISTS OF A PYROLYZER COMBINED DIRECTLY WITH A SENSITIVE DETECTOR OPERATED AT A HIGH TEMPERATURE. D R A W I N G
Inventors
- 👤 Frank T Eggertsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:12
CPC Classifications
G; G01; G01N; G01N7/00; G01N7/14; G01N17/00; G01N25/00; Y; Y10; Y10T; Y10T436/00; Y10T436/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |