US4287257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphors for color televisions
Assignee: Mitsubishi Chemical Corp
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Filing: 1979-09-17
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Granted: 1981-09-01
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Expires: 1999-09-17
Abstract
Abstract A phosphor for color television surface-treated with zinc hydroxide so that zinc hydroxide attaches thereto in an amount below 0.7 part by weight per 100 parts by weight of the phosphor. Phosphor slurries for production of phosphor screens prepared from the phosphor have improved light-exposure sensitivity at the formation of and produced from these slurries phosphor screens showing less color mixing.
Inventors
- 👤 Susumu Ohmatoi
- 👤 Hitoshi Tanaka
- 👤 Seiji Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:40
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/025; G; G01; G01N; G01N33/00; G01N33/18; G01N33/1826; G01N33/1833; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
42 words
A phosphor comprising a phosphor for color television and zinc hydroxide attached to the phosphor for color television, the amount of said zinc hydroxide being less than 0.7 part by weight per 100 parts by weight of the phosphor for color television.
Claim 2
Dependent Claim
42 words
A phosphor comprising a phosphor for color television and zinc hydroxide attached to the phosphor for color television, the amount of said zinc hydroxide being less than 0.7 part by weight per 100 parts by weight of the phosphor for color television.
Claim 3
Dependent Claim
30 words
The phosphor as claimed in claim 1 wherein the amount of said zinc hydroxide is 0.01-0.5 part by weight per 100 parts by weight of the phosphor for color television.
Claim 4
Dependent Claim
64 words
The phosphor as claimed in claim 1 or 2 wherein the phosphor for color television is a blue emitting phosphor component selected from a silver activated zinc sulfide phosphor, a silver and aluminum activated zinc sulfide phosphor, a cobalt aluminate blue pigment particle attached silver activated zinc sulfide phosphor, and a cobalt aluminate blue pigment particle attached silver and aluminum activated zinc sulfide phosphor.
Claim 5
Dependent Claim
70 words
The phosphor as claimed in claim 1 or 2 wherein the phosphor for color television is a green emitting phosphor component selected from a mixed phosphor of a copper and aluminum activated zinc sulfide phosphor and a gold and aluminum activated zinc sulfide phosphor, a copper and aluminum activated zinc sulfide phosphor, a gold, copper and aluminum activated zinc sulfide phosphor, and a copper and aluminum activated zinc-cadmium sulfide phosphor.
Claim 6
Dependent Claim
84 words
The phosphor as claimed in claim 1 or 2 wherein the phosphor for color television is a red emitting phosphor component selected from a europium activated yttrium oxisulfide phosphor, a europium activated yttrium oxide phosphor, a red oxide red pigment particle attached europium activated yttrium sulfide phosphor, a red oxide red pigment particle attached europium activated yttrium oxide phosphor, a cadmium sulfoselenide red pigment particle attached europium activated yttrium oxisulfide phosphor, and a cadmium sulfoselenide red pigment particle attached europium activated yttrium oxide phosphor.
Claim 7
Dependent Claim
46 words
A phosphor comprising a phosphor for color television and zinc hydroxide and a dispersion agent attached to the phosphor for color television, the amount of said zinc hydroxide being less than 0.7 part by weight per 100 parts by weight of the phosphor for color television.
Claim 8
Dependent Claim
46 words
A phosphor comprising a phosphor for color television and zinc hydroxide and a dispersion agent attached to the phosphor for color television, the amount of said zinc hydroxide being less than 0.7 part by weight per 100 parts by weight of the phosphor for color television.
Claim 9
Dependent Claim
30 words
The phosphor as claimed in claim 6 wherein the amount of said zinc hydroxide is 0.01-0.5 part by weight per 100 parts by weight of the phosphor for color television.
Claim 10
Dependent Claim
16 words
The phosphor as claimed in claim 6 or 7 wherein the dispersing agent is silicon dioxide.
Claim 11
Dependent Claim
64 words
The phosphor as claimed in claim 6 or 7 wherein the phosphor for color television is a blue emitting phosphor component selected from a silver activated zinc sulfide phosphor, a silver and aluminum activated zinc sulfide phosphor, a cobalt aluminate blue pigment particle attached silver activated zinc sulfide phosphor and a cobalt aluminate blue pigment particle attached silver and aluminum activated zinc sulfide phosphor.
Claim 12
Dependent Claim
69 words
The phosphor as claimed in claim 6 or 7 wherein the phosphor for color television is a green emitting phosphor component selected from a mixed phosphor of a copper and aluminum activated zinc sulfide phosphor and a gold and aluminum activated zinc sulfide phosphor, a copper and aluminum activated zinc sulfide phosphor, a gold, copper and aluminum activated zinc sulfide phosphor, and copper and aluminum activated zinc-cadmium sulfide phosphor.
Claim 13
Dependent Claim
84 words
The phosphor as claimed in claim 6 or 7 wherein the phosphor for color television is a red emitting phosphor component selected from a europium activated yttrium oxisulfide phosphor, a europium activated yttrium oxide phosphor, a red oxide red pigment particle attached europium activated yttrium oxisulfide phosphor, a red oxide red pigment particle attached europium activated yttrium oxide phosphor, a cadmium sulfoselenide red pigment particle attached europium activated yttrium oxisulfide phosphor and a cadmium sulfoselenide red pigment particle attached europium activated yttrium oxide phosphor.
Claim 14
Dependent Claim
67 words
The phosphor as claimed in claim 8 wherein the phosphor for color television is a green emitting phosphor component selected from a mixed phosphor of a copper and aluminum activated zinc sulfide phosphor and a gold and aluminum activated zinc sulfide phosphor, a copper and aluminum activated zinc sulfide phosphor, a gold, copper and aluminum activated zinc sulfide phosphor, and copper and aluminum activated zinc-sulfide cadmium phosphor.
Claim 15
Dependent Claim
82 words
The phosphor as claimed in claim 8 wherein the phosphor for color television is a red emitting phosphor component selected from a europium activated yttrium oxisulfide phosphor, a europium activated yttrium oxide phosphor, a red oxide red pigment particle attached europium activated yttrium oxisulfide phosphor, a red oxide red pigment particle attached europium activated yttrium oxide phosphor, a cadmium sulfoselenide red pigment particle attached europium activated yttrium oxisulfide phosphor and a cadmium sulfoselenide red pigment particle attached europium activated yttrium oxide phosphor.
References Cited (Backward Citations)
US2136871A
Cited
US2971859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |