US3580047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pour and cloud point analyzer
Assignee: Shell USA Inc
•
Filing: 1967-11-24
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Granted: 1971-05-25
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Expires: 1987-11-24
Abstract
Abstract Apparatus for determining the pour point of an oil sample by observing the temperature at which the solidified constituents in the oil sample, upon being heated, will no longer support a small object. This point is indicated by discontinuance in an automatically recorded time/temperature curve during the warning portion of the cycle. The inception point of a plateau in the time/temperature curve during the cooling portion of the cycle is the crystal point. This crystal point correlates with the ASTM cloud point. Modification of the apparatus for continuous service can be accomplished by automatically introducing the sample, then cooling, heating, removing the sample and recirculating a fresh sample.
Inventors
- 👤 Samuel W Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:39
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/26; G01N33/28; G01N33/2811; G01N25/00; G01N25/02; G01N25/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
Apparatus as in claim 1 wherein said plate means has an opening therein to accommodate the lower end Of the temperature-measuring means.
Claim 2
Dependent Claim
16 words
Apparatus as in claim 1 wherein the weight of said plate means is approximately 4 grams.
Claim 3
Dependent Claim
36 words
Apparatus as in claim 1 wherein said cooling means comprises electrically operated solenoid valve means connected to said casing adapted to open to admit a colling medium therein to initiate the cooling cycle of said sample.
Claim 4
Dependent Claim
23 words
Apparatus as in claim 4 wherein said cooling means includes electrical circuit means connected to said valve means for actuating said cooling means.
Claim 5
Dependent Claim
33 words
Apparatus as in claim 1 including sample refilling means connected to said casing for draining any sample within said casing, flushing said casing after draining and refilling said casing with a fresh sample.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |