Patent US4819085A successfully refreshed from Google Patents.
US4819085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen for cathode ray tubes
Assignee: RCS TECHNOLOGY CORP TAIPEI TAIWAN A CORP OF TAIWAN
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Filing: 1987-07-01
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Granted: 1989-04-04
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Expires: 2007-07-01
Abstract
Abstract A protective screen formed of a frame and a series of woven, non-metallic fibers. The screen is fitted over a display surface of a cathode ray tube (CRT) to reduce glare and/or to diffuse emanated radiation and static electricity. The frame includes outer non-metallic frame ports and a rigidifying metallic inner frame part.
Inventors
- 👤 Paul M. Liang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:09
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/64; H04N5/65; H01; H01J; H01J29/00; H01J29/86; H01J29/867; H01J29/868; H01J29/89; H01J29/896; H01J2229/00; H01J2229/863; H01J2229/8633; H01J2229/89; H01J2229/8913; H01J2229/8922
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
57 words
A protective device adapted for use with a cathode ray tube, said device comprising a frame which includes a flexible non-metallic outer frame member and a rigidifying metallic inner frame member, and a screen formed of non-metallic woven fibers which have been chemically treated wherein the fibers are rendered electrically conductive, said screen fitted in said frame.
Claim 2
Dependent Claim
57 words
A protective device adapted for use with a cathode ray tube, said device comprising a frame which includes a flexible non-metallic outer frame member and a rigidifying metallic inner frame member, and a screen formed of non-metallic woven fibers which have been chemically treated wherein the fibers are rendered electrically conductive, said screen fitted in said frame.
Claim 3
Dependent Claim
95 words
In combination, a video display terminal including a cathode ray tube and a ground wire, and a radiation elimination device comprising a frame, said frame including a flexible non-metallic outer frame member and a rigidifying metallic inner frame member, and a screen formed entirely of non-metallic fibers which have been chemically treated to render the fibers electrically conductive, said screen secured in said frame, means connecting said screen to said ground wire for diffusing static electricity and electromagnetic radiation emanating from said cathode ray tube, said screen positioned in front of said cathode ray tube.
Claim 4
Dependent Claim
95 words
In combination, a video display terminal including a cathode ray tube and a ground wire, and a radiation elimination device comprising a frame, said frame including a flexible non-metallic outer frame member and a rigidifying metallic inner frame member, and a screen formed entirely of non-metallic fibers which have been chemically treated to render the fibers electrically conductive, said screen secured in said frame, means connecting said screen to said ground wire for diffusing static electricity and electromagnetic radiation emanating from said cathode ray tube, said screen positioned in front of said cathode ray tube.
Claim 5
Dependent Claim
17 words
The combination of claim 2 wherein said screen is formed entirely of electrically conductive non-metallic woven fibers.
Claim 6
Dependent Claim
44 words
A protective device adapted for use with a cathode ray tube, said device comprising a frame which includes a flexible non-metallic frame member and a rigidifying metallic inner frame member, and a screen formed entirely of non-conductive, non-metallic woven fibers fitted in said frame.
Claim 7
Dependent Claim
44 words
A protective device adapted for use with a cathode ray tube, said device comprising a frame which includes a flexible non-metallic frame member and a rigidifying metallic inner frame member, and a screen formed entirely of non-conductive, non-metallic woven fibers fitted in said frame.
References Cited (Backward Citations)
US4468702A
Cited
US4468702B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |