US4032791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent screen and method of making
Assignee: GTE Sylvania Inc
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Filing: 1976-06-16
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Granted: 1977-06-28
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Expires: 1996-06-16
Abstract
Abstract A fluorescent screen is disclosed which comprises a plastic film support layer, a reflectance layer of vacuum-deposited aluminum on said support layer, and a layer of fluorescent material dispersed in an organic polymeric binder located on said reflectance layer. A method for making the above screen is also disclosed.
Inventors
- 👤 Vincent Chiola
- 👤 Sixdeniel Faria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:05
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; G; G21; G21K; G21K4/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A fluorescent screen comprising: a plastic film support layer having a first thickness; a reflectance layer of vapor-deposited aluminum on said support layer and having a second thickness, the ratio of thicknesses of said support layer to said reflectance layer within the range of from about 7:1 to about 24:1; a flexible layer of a fluorescent material dispersed in an organic polymeric binder, said flexible layer located on said reflectance layer and having a third thickness, the ratio of thicknesses of said flexible layer to said reflectance layer within the range of from about 4:1 to about 22:1.
Claim 2
Dependent Claim
98 words
A fluorescent screen comprising: a plastic film support layer having a first thickness; a reflectance layer of vapor-deposited aluminum on said support layer and having a second thickness, the ratio of thicknesses of said support layer to said reflectance layer within the range of from about 7:1 to about 24:1; a flexible layer of a fluorescent material dispersed in an organic polymeric binder, said flexible layer located on said reflectance layer and having a third thickness, the ratio of thicknesses of said flexible layer to said reflectance layer within the range of from about 4:1 to about 22:1.
Claim 3
Dependent Claim
15 words
The fluorescent screen according to claim 1 wherein said plastic film support layer is Mylar.
Claim 4
Dependent Claim
15 words
The fluorescent screen according to claim 2 wherein said fluorescent material is an X-ray phosphor.
Claim 5
Dependent Claim
16 words
The fluorescent screen according to claim 3 wherein said X-ray phosphor is a rare earth-containing phosphor.
Claim 6
Independent Claim
105 words
A method for making a fluorescent screen, said method comprising: providing a support layer of plastic film material having a first thickness; vapor-depositing a reflectance layer of aluminum having a second thickness on said support layer, the ratio of thicknesses of said plastic film to said reflectance layer within the range of from about 7:1 to about 24:1, and providing a flexible layer of fluorescent material dispersed in an organic polymeric binder on said reflectance layer, said flexible layer having a third thickness, the ratio of thicknesses of said flexible layer to said reflectance layer within the range of from about 4:1 to about 22:1.
Claim 7
Independent Claim
105 words
A method for making a fluorescent screen, said method comprising: providing a support layer of plastic film material having a first thickness; vapor-depositing a reflectance layer of aluminum having a second thickness on said support layer, the ratio of thicknesses of said plastic film to said reflectance layer within the range of from about 7:1 to about 24:1, and providing a flexible layer of fluorescent material dispersed in an organic polymeric binder on said reflectance layer, said flexible layer having a third thickness, the ratio of thicknesses of said flexible layer to said reflectance layer within the range of from about 4:1 to about 22:1.
Claim 8
Dependent Claim
13 words
The method according to claim 5 wherein said plastic film material is Mylar.
Claim 9
Dependent Claim
14 words
The method according to claim 6 wherein said fluorescent material is an X-ray phosphor.
Claim 10
Dependent Claim
15 words
The method according to claim 7 wherein said X-ray phosphor is a rare earth-containing phosphor.
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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |