US5185207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphor for cathode ray tube and surface treatment method for the phosphor
Assignee: Nichia Corp
•
Filing: 1991-12-27
•
Granted: 1993-02-09
•
Expires: 2011-12-27
Abstract
Abstract In a phosphor for a cathode-ray tube, a composition containing SiO 2 and at least one element selected from the group consisting of indium, zirconium, and antimony is adhered on the surfaces of phosphor particles.
Inventors
- 👤 Misa Furuoka
- 👤 Shoichi Bando
- 👤 Akio Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:07
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/025; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A phosphor for a cathode-ray tube comprising: phosphor particles; and a surface treatment composition adhered on the surfaces of said phosphor particles containing, per 100 parts by weight of said phosphor, 0.01 to 3 parts by weight of SiO 2 and 0.0005 to 1.0 part by weight, per 100 parts by weight of said phosphor, of at least one element selected from the group consisting of indium zirconium, and antimon.
Claim 2
Dependent Claim
70 words
A phosphor for a cathode-ray tube comprising: phosphor particles; and a surface treatment composition adhered on the surfaces of said phosphor particles containing, per 100 parts by weight of said phosphor, 0.01 to 3 parts by weight of SiO 2 and 0.0005 to 1.0 part by weight, per 100 parts by weight of said phosphor, of at least one element selected from the group consisting of indium zirconium, and antimon.
Claim 3
Dependent Claim
37 words
A phosphor according to claim 1, wherein the amount of indium, zirconium, or antimony contained in said surface treatment composition is 0.01 to 0.5 parts by weight with respect to 100 parts by weight of said phosphor.
Claim 4
Dependent Claim
31 words
A phosphor according to claim 1, wherein said surface treatment composition also contains less than 0.1 part of at least one element selected from the group consisting of zinc and aluminum.
Claim 5
Dependent Claim
45 words
A phosphor according to claim 1, wherein said phosphor is at least one member selected from the group consisting of a zinc sulfide-based phosphor, a zinc phosphate-based phosphor, a zinc silicate-based phosphor, a yttrium trisulfide-based phosphor, a yttrium oxide-based phosphor, and an indium borate-based phosphor.
Claim 6
Dependent Claim
62 words
A phosphor according to claim 1, wherein said composition contains 0.08 to 0.8 parts by weight of SiO 2 , 0.03 to 0.5 parts by weight of at least one metal selected from the group consisting of indium, zirconium, and antimony, and 0.01 to 0.05 parts by weight of at least one element selected from the group consisting of zinc and aluminum.
Claim 7
Dependent Claim
29 words
A phosphor according to claim 1, wherein at least one metal selected from the group consisting of indium, zirconium, and antimony is present in the form of a compound.
References Cited (Backward Citations)
GB1168074A
Cited
NL6709266A
Cited
US3522071A
Cited
US3690929A
Cited
DE2744763A1
Cited
US4209567A
Cited
US4287229A
Cited
US4544605A
Cited
US4691140A
Cited
US4690832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-09 | 1996-08-10 | 1997-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-09 | 2000-08-10 | 2001-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-09 | 2004-08-10 | 2005-02-09 | $7700.00 | Window Closed / Lapsed |