US4928035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass viewing screen for a color-picture-reproducing device and a method of making the same
Assignee: Nokia Deutschland GmbH
•
Filing: 1989-02-14
•
Granted: 1990-05-22
•
Expires: 2009-02-14
Abstract
Abstract In a glass viewing screen for a color-picture-reproducing device, the phosphor areas deposited on the inside of the glass viewing screen are surrounded by a sealing-glass matrix. The matrix is made of a sealing glass that shrinks upon thermal crystallization so that the sealing glass may be deposited by screen printing.
Inventors
- 👤 Michael Schlipf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:35
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/24; C; C03; C03C; C03C17/00; C03C17/02; C03C17/04; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2278
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A glass viewing screen for a color-picture-reproducing device, comprising: a glass viewing screen; phosphor areas deposited on the inside surface of said screen; and a matrix of glass elements formed on said screen and surrounding said phosphor areas, said glass elements comprising a crystallizing sealing glass, applied to said screen as a paste by screen printing, said sealing glass paste having particles, 80 percent or more of which are smaller than 15 um, whereby the sealing glass has a characteristic such that it shrinks upon thermal crystallization.
Claim 2
Dependent Claim
87 words
A glass viewing screen for a color-picture-reproducing device, comprising: a glass viewing screen; phosphor areas deposited on the inside surface of said screen; and a matrix of glass elements formed on said screen and surrounding said phosphor areas, said glass elements comprising a crystallizing sealing glass, applied to said screen as a paste by screen printing, said sealing glass paste having particles, 80 percent or more of which are smaller than 15 um, whereby the sealing glass has a characteristic such that it shrinks upon thermal crystallization.
Claim 3
Dependent Claim
29 words
A glass viewing screen as described in claim 1, wherein the sealing glass particles are of a size such that 80 percent or more are less than 10 um.
Claim 4
Dependent Claim
29 words
A glass viewing screen as described in claim 1, wherein the sealing glass particles are of a size such that 90 percent or more are less than 10 um.
Claim 5
Dependent Claim
20 words
A glass viewing screen as described in claim 1, wherein the matrix elements have widths between 50 and 60 um.
Claim 6
Dependent Claim
18 words
A glass viewing screen as described in claim 1, wherein the elements of said matrix include parallel lines.
Claim 7
Dependent Claim
21 words
A glass viewing screen as described in claim 5, wherein the elements of said matrix include intersecting sets of parallel lines.
Claim 8
Dependent Claim
19 words
A glass viewing screen as described in claim 1, wherein the sealing glass is a lead oxide sealing glass.
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) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |