Patent US3577765A successfully refreshed from Google Patents.
US3577765A
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US
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Apparatus for determining crystalization temperature
Assignee: Monsanto Co
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Filing: 1967-12-26
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Granted: 1971-05-04
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Expires: 1987-12-26
Abstract
Abstract Method and apparatus for automatically determining the crystallization temperature of a flowing liquid. Temperature control means are adapted to vary the liquid viscosity within a crystallization zone. Changes in flow or pressure drop caused by the viscosity changes provide the basis for temperature control. Because operation of the system is cyclic, the effects of heat of crystallization of the liquid can be observed on a recording of crystallization zone temperature, thus identifying the crystallization temperature.
Inventors
- 👤 Joseph Bertoglio
- 👤 Philip L Deming
- 👤 Joyce G Eckert
- 👤 James R Shafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:39
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/02; G01N25/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
Apparatus for determining the crystallization temperature of a flowing liquid comprising: a. conduit means adapted to house said flowing liquid; b. a crystallization member within said conduit means; c. viscosity sensing means responsive to viscosity changes within said crystallization member; d. liquid temperature control means cooperating with said viscosity sensing means; and e. temperature indicating means adapted to monitor crystallization zone temperature.
Claim 2
Dependent Claim
69 words
Apparatus for determining the crystallization temperature of a flowing liquid comprising: a. a sidestream conduit communicating with a process stream; b. sidestream flow control means within said conduit; c. a crystallization member within said conduit; d. viscosity sensing means responsive to viscosity changes within said crystallization member; e. liquid temperature control means cooperating with said viscosity sensing means; and f. temperature indicating means adapted to monitor crystallization zone temperature.
Claim 3
Dependent Claim
13 words
An apparatus of claim 1 wherein the viscosity sensing means is a flowmeter.
Claim 4
Dependent Claim
15 words
An apparatus of claim 1 wherein the viscosity sensing means is a differential pressure meter.
Claim 5
Dependent Claim
16 words
An apparatus of claim 2 wherein the crystallization member is a coil of temperature controlled tubing.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |