US5322707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a fluorescent screen
Assignee: Samsung SDI Co Ltd
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Filing: 1993-07-09
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Granted: 1994-06-21
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Expires: 2013-07-09
Abstract
Abstract The present invention discloses a phosphor slurry composition for color Braun tubes comprising deionized water, phosphor powder, polyvinyl alcohol, sodium dichromate, ethyl silicate and zinc sulfate. A color Braun tube manufactured using a phosphor slurry composition of the present invention shows an excellent mirror reflection effect and high luminescent brightness.
Inventors
- 👤 Ikchull Ihm
- 👤 Minho Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:19
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/08; C09K11/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A method of forming a fluorescent screen comprising the steps of: coating a panel of a Braun tube with a photosetting resin which has a photoadhesive property when exposed to ultraviolet light; drying the coating; exposing the coating to said light to form an adhesive film; and coating said film with a phosphor slurry composition, said composition being prepared by subjecting a mixture comprising: a) 100 parts by weight of phosphor powder, b) 120-130 parts by weight of polyvinyl alcohol, c) 5-6 parts by weight of sodium dichromate, d) 0.0009-0.5 parts by weight of ethyl silicate, e) 0.002-0.04 parts by weight of zinc sulfate and f) 120-130 parts by weight of deionized water, to ball milling.
Claim 2
Independent Claim
116 words
A method of forming a fluorescent screen comprising the steps of: coating a panel of a Braun tube with a photosetting resin which has a photoadhesive property when exposed to ultraviolet light; drying the coating; exposing the coating to said light to form an adhesive film; and coating said film with a phosphor slurry composition, said composition being prepared by subjecting a mixture comprising: a) 100 parts by weight of phosphor powder, b) 120-130 parts by weight of polyvinyl alcohol, c) 5-6 parts by weight of sodium dichromate, d) 0.0009-0.5 parts by weight of ethyl silicate, e) 0.002-0.04 parts by weight of zinc sulfate and f) 120-130 parts by weight of deionized water, to ball milling.
References Cited (Backward Citations)
US3887753A
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JPS4921831A
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SU990791A1
Cited
JPS5720651A
Cited
JPS5919156A
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JPS62110230A
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JPH01213387A
Cited
JPH02242880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-20 | 1997-12-20 | 1998-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-20 | 2001-12-20 | 2002-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-20 | 2005-12-20 | 2006-06-21 | $7700.00 | Window Closed / Lapsed |