Patent US4515896A successfully refreshed from Google Patents.
US4515896A
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US
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Fluorescent additives for the determination of condensed and vapor phases in multiphase systems
Assignee: RTX Corp
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Filing: 1983-12-12
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Granted: 1985-05-07
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Expires: 2003-12-12
Abstract
Abstract A method for determining the spatial and phase distribution of a liquid-vapor multiphase fluid. The method comprises adding a fluorescent monomer and a quencher to the fluid to be studied. The fluid is then dispersed and the monomer excited. The excited monomer combines with the quencher to form a fluorescent exciplex. The monomer fluorescence is predominantly in the vapor phase and the exciplex fluorescence is predominantly in the liquid phase.
Inventors
- 👤 Lynn A. Melton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:02
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6428; G01N21/643; G01N2021/6432; Y; Y10; Y10S; Y10S436/00; Y10S436/905
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
A method for determining the spatial and phase distribution of a liquid-vapor multiphase fluid comprising: adding a fluorescent monomer and a quencher to a fluid, dispersing the fluid to produce a liquid-vapor multiphase fluid, exciting the monomer by directing an energy source of a proper wavelength at the dispersed fluid, the excited monomer then combines with the quencher to produce a fluorescent exciplex in the dispersed fluid, determining the spatial and phase distribution of the dispersed fluid by detecting the relative fluorescence of both the fluorescent monomer and exciplex in the dispersed fluid, said fluorescent monomer being present primarily in the vapor phase and said fluorescent exciplex being present primarily in the liquid phase.
Claim 2
Independent Claim
114 words
A method for determining the spatial and phase distribution of a liquid-vapor multiphase fluid comprising: adding a fluorescent monomer and a quencher to a fluid, dispersing the fluid to produce a liquid-vapor multiphase fluid, exciting the monomer by directing an energy source of a proper wavelength at the dispersed fluid, the excited monomer then combines with the quencher to produce a fluorescent exciplex in the dispersed fluid, determining the spatial and phase distribution of the dispersed fluid by detecting the relative fluorescence of both the fluorescent monomer and exciplex in the dispersed fluid, said fluorescent monomer being present primarily in the vapor phase and said fluorescent exciplex being present primarily in the liquid phase.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the fluid is dispersed by passing it through a fuel spray nozzle.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the monomer is naphthalene and the quencher is tetramethyl-p-phenylene diamine.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein the monomer is excited by subjecting the dispersed fluid to laser radiation.
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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |