US3655262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear projection screen
Assignee: Eastman Kodak Co
•
Filing: 1970-09-04
•
Granted: 1972-04-11
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Expires: 1990-09-04
Abstract
Abstract A transmission type screen embodies a glass or plastic support having a color quality and ambient light control layer applied to the viewing side of the support. The layer comprises a dispersion of gelatin, fine particles of chlorinated diphenyl resin and a number of water-soluble dyes such as Toluidine Blue, Brilliant Acid, Cyanine Blue, Fast Light Red, Superchrome Yellow and Ethyl Orange. Such a screen structure provides an appropriate color temperature or color quality control and effectively eliminates the ambient light incident on the screen, thereby enhancing image contrast.
Inventors
- 👤 James J Depalma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:14
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
14 words
A screen material in accordance with claim 1 wherein said carrier medium is gelatin.
Claim 2
Dependent Claim
18 words
A screen material in accordance with claim 1 wherein said carrier medium is a generally transparent plastic material.
Claim 3
Dependent Claim
14 words
A screen material in accordance with claim 1 wherein said carrier medium is methacrylate.
Claim 4
Dependent Claim
14 words
A screen material in accordance with claim 1 wherein said carrier medium is polystyrene.
Claim 5
Dependent Claim
22 words
A screen material in accordance with claim 1 wherein said light absorbing dyes are blue, light red, yellow and orange in color.
Claim 6
Dependent Claim
55 words
A rear projection screen comprising a generally transparent support and a color quality and ambient light control layer applied to at least the viewing side of said support, said layer comprising a dispersion of a generally clear carrier medium, fine particles of chlorinated diphenyl resin and a plurality of light absorbing dyes of different color.
Claim 7
Dependent Claim
14 words
A rear projection screen in accordance with claim 7 wherein said support is glass.
Claim 8
Dependent Claim
18 words
A rear projection screen in accordance with claim 7 wherein said support is a generally transparent plastic material.
Claim 9
Dependent Claim
15 words
A rear projection screen in accordance with claim 7 wherein said carrier medium is gelatin.
Claim 10
Dependent Claim
21 words
A rear projection screen in accordance with claim 7 wherein said dyes are blue, light red, yellow and orange in color.
Claim 11
Dependent Claim
67 words
A rear projection screen comprising a generally transparent plastic support and a color quality and ambient light control layer applied to at least the viewinG side of said support, said layer comprising a dispersion of gelatin, fine particles of chlorinated diphenyl resin and a plurality of light absorbing dyes which are Toluidine Blue, Brilliant Acid Cyanine Blue, Fast Light Red, Superchrome Yellow and Ethyl Orange in color.
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |