Patent US3893750A successfully refreshed from Google Patents.
US3893750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube screening correction lens with a non-solarizing material
Assignee: RCA Licensing Corp
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Filing: 1973-05-02
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Granted: 1975-07-08
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Expires: 1993-05-02
Abstract
Abstract Essentially, the device comprises a rigid transparent substrate, such as glass, and a nonsolarizing polymer layer, such as silicone resin, on the substrate. An effective surface is formed on the surface of the polymer layer opposite the substrate.
Inventors
- 👤 Amato Ralph James D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:35
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/30; H01J29/32; H01J29/327; G; G02; G02B; G02B3/00; G02B3/02; G02B3/08; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J9/2272; H01J9/2273; H01J9/2278
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A refractive device for correcting the paths of light rays in the formation of a color television picture tube screen comprising, at least a portion of said device having an effective surface thereon for correcting paths of light rays passing therethrough during formation of said screen to substantially correspond to paths electron beams will take in striking the screen in a completed tube, said portion being a silicone resin that is substantially nonsolarizing when exposed to ultraviolet radiation in the range of 290 to 400 nanometers, and a rigid transparent substrate for supporting said portion.
Claim 2
Dependent Claim
95 words
A refractive device for correcting the paths of light rays in the formation of a color television picture tube screen comprising, at least a portion of said device having an effective surface thereon for correcting paths of light rays passing therethrough during formation of said screen to substantially correspond to paths electron beams will take in striking the screen in a completed tube, said portion being a silicone resin that is substantially nonsolarizing when exposed to ultraviolet radiation in the range of 290 to 400 nanometers, and a rigid transparent substrate for supporting said portion.
Claim 3
Dependent Claim
16 words
The device as defined in claim 1, wherein said effective surface is a continuously contoured surface.
Claim 4
Dependent Claim
17 words
The device as defined in claim 1, wherein said effective surface has at least one surface discontinuity.
Claim 5
Dependent Claim
20 words
The device as defined in claim 3, including a mask grid embedded in said portion and aligned with said discontinuity.
Claim 6
Dependent Claim
35 words
The device as defined in claim 1, wherein said effective surface has at least one surface discontinuity and said substrate includes a mask pattern on a surface thereof, said mask pattern aligned with said discontinuity.
Claim 7
Dependent Claim
107 words
A refractive device for correcting the paths of light rays in the formation of a color television picture tube screen comprising, a rigid transparent substrate, a transparent silicone resin layer uniformly attached to said substrate, said silicone resin being a material having good ultraviolet transmission characteristics and being resistant to solarization in the ultraviolet wavelength range of 290 to 400 nanometers of color television picture tube screening devices, said silicone resin layer having an effective surface thereon for correcting paths of light rays passing therethrough during formation of said screen to substantially correspond to paths electron beams will take in striking the screen in a completed tube.
Claim 8
Dependent Claim
107 words
A refractive device for correcting the paths of light rays in the formation of a color television picture tube screen comprising, a rigid transparent substrate, a transparent silicone resin layer uniformly attached to said substrate, said silicone resin being a material having good ultraviolet transmission characteristics and being resistant to solarization in the ultraviolet wavelength range of 290 to 400 nanometers of color television picture tube screening devices, said silicone resin layer having an effective surface thereon for correcting paths of light rays passing therethrough during formation of said screen to substantially correspond to paths electron beams will take in striking the screen in a completed tube.
Claim 9
Dependent Claim
30 words
The device as defined in claim 6, wherein the silicone resin has ultraviolet transmission characteristics and solarization resistance similar to a silicone resin manufactured by Dow-Corning, Inc. and designated R63-489,
Claim 10
Dependent Claim
18 words
The device as defined in claim 6, wherein thickness of said polymer layer is less than 100 mils.
Claim 11
Dependent Claim
22 words
The device as defined in claim 8, wherein thickness of said polymer layer is within the range of 30 to 40 mils.
References Cited (Backward Citations)
US3279340A
Cited
US3486825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |