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Patent US4533850A successfully refreshed from Google Patents.
US4533850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color projector apparatus of single cathode ray tube type
Assignee: Sony Corp
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Filing: 1983-03-10
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Granted: 1985-08-06
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Expires: 2003-03-10
Abstract
Abstract A color projector apparatus including a single cathode ray tube of index-type having a first transparent panel with phosphor elements of three primary colors and an indexing element formed on the inner surface thereof, a second transparent panel located in front of the first transparent panel of cathode ray tube, a metal frame-shape spacer for supporting the second transparent panel, and a transparent liquid coolant filled into the space between the first and second transparent panels.
Inventors
- 👤 Akio Ohkoshi
- 👤 Takashi Toyama
- 👤 Toshiro Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:09
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H01; H01J; H01J29/00; H01J29/006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A high brightness cathode ray tube comprising: (a) a single, color cathode ray tube of index-type having a first transparent panel with phosphor elements of three primary colors and an indexing element formed on the inner surface thereof; (b) a second transparent panel located in front of said first transparent panel of said cathode ray tube; (c) a metal frame-shape spacer for supporting said second transparent panel; and (d) a transparent liquid coolant filled into the space between said first and second transparent panels.
Claim 2
Dependent Claim
84 words
A high brightness cathode ray tube comprising: (a) a single, color cathode ray tube of index-type having a first transparent panel with phosphor elements of three primary colors and an indexing element formed on the inner surface thereof; (b) a second transparent panel located in front of said first transparent panel of said cathode ray tube; (c) a metal frame-shape spacer for supporting said second transparent panel; and (d) a transparent liquid coolant filled into the space between said first and second transparent panels.
Claim 3
Dependent Claim
28 words
A high brightness cathode ray tube according to claim 1, wherein said metal frame-shape spacer is in contact with said transparent liquid coolant and has heat radiation properties.
Claim 4
Dependent Claim
32 words
A high brightness cathode ray tube according to claim 1, wherein said metal frame-shape spacer is interposed between said first and second transparent panels and is sealed therebetween by an elastic sealant.
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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |