US5150004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube antiglare coating
Assignee: Zenith Electronics LLC
•
Filing: 1990-10-27
•
Granted: 1992-09-22
•
Expires: 2010-10-27
Abstract
Abstract A cathode ray tube (CRT) having a surface with reduced gloss and reflectivity and a method for providing such reduced gloss and reflectivity. In the method of the invention, a solution of a silane and a saturated hydrocarbon in a solvent system of an alcohol and water is provided. The solution is applied to the surface of a cathode ray tube to impart antiglare properties to the surface. Thereafter, the CRT with the silane applied is cured at an elevated temperature for a period of time sufficient to cause the silane to react and be converted to siloxane.
Inventors
- 👤 Hua Sou Tong
- 👤 Gregory Prando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:13
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/867; H01J29/868; H01J29/89; H01J29/896; H01J9/00; H01J9/20
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
113 words
A CRT having a surface with reduced gloss comprising a CRT having a coating on the surface thereof, said coating being provided by applying fine droplets of a solution of a silane and a saturated hydrocarbon selected from the group consisting of saturated straight chain paraffinic hydrocarbons having the formula C n H 2n+2 and saturated cyclic napthenic hydrocarbons having the formula C n H 2n in a solvent system comprising an alcohol and water onto the surface of said CRT and curing the silane and saturated hydrocarbon for a period of time sufficient to convert said silane to a siloxane being in the form of a random distribution of substantially uniform undulations.
Claim 2
Dependent Claim
113 words
A CRT having a surface with reduced gloss comprising a CRT having a coating on the surface thereof, said coating being provided by applying fine droplets of a solution of a silane and a saturated hydrocarbon selected from the group consisting of saturated straight chain paraffinic hydrocarbons having the formula C n H 2n+2 and saturated cyclic napthenic hydrocarbons having the formula C n H 2n in a solvent system comprising an alcohol and water onto the surface of said CRT and curing the silane and saturated hydrocarbon for a period of time sufficient to convert said silane to a siloxane being in the form of a random distribution of substantially uniform undulations.
Claim 3
Dependent Claim
17 words
A CRT in accordance with claim 1 wherein n is an integer of from 8 to 16.
Claim 4
Dependent Claim
20 words
A CRT in accordance with claim 1 wherein said saturated hydrocarbon is selected from kerosene, jet fuel and mixtures thereof.
Claim 5
Dependent Claim
43 words
A CRT in accordance with claim 1 wherein said silane is present on the surface of said cathode ray tube at a level of from about 0.3 to about 1.2 milligrams per square centimeter of said surface area of said cathode ray tube.
Claim 6
Dependent Claim
23 words
A CRT in accordance with claim 1 wherein said solution is applied by spraying a fine mist of said solution onto said surface.
Claim 7
Dependent Claim
34 words
A CRT in accordance with claim 1 wherein said silane is present in said solution at a level of from about 0.5 percent to about 50 percent, based on the weight of said solution.
Claim 8
Dependent Claim
12 words
A CRT in accordance with claim 1 wherein said alcohol is propanol.
Claim 9
Dependent Claim
22 words
A CRT in accordance with claim 1 wherein said solution droplets have a diameter of from about 0.3 to about 0.5 microns.
Claim 10
Dependent Claim
82 words
A CRT in accordance with claim 1 wherein said silane is an alkoxy or aryloxy silane which is present in said solution at a level of from about 0.5% to about 50%, said saturated hydrocarbon is present in said solution at a level of from about 0.1% to about 10%, said alcohol is present in said solution at a level of from 0% to about 95% and said water is present in said solution at a level of from 5% to 100%.
Claim 11
Dependent Claim
23 words
A CRT in accordance with claim 1 wherein said surface of said cathode ray tube is preheated prior to application of said solution.
Claim 12
Dependent Claim
34 words
A CRT in accordance with claim 1 wherein said cathode ray tube is preheated to a temperature in the range of from about 70° C. to about 120° C. prior to applying said solution.
Claim 13
Dependent Claim
43 words
A CRT in accordance with claim 1 wherein said silane is present on the surface of said cathode ray tube at a level of from about 0.3 to about 1.2 milligrams per square centimeter of said surface area of said cathode ray tube.
Claim 14
Dependent Claim
24 words
A CRT in accordance with claim 1 wherein said solution is applied to said surface of said cathode ray tube by multiple spray passes.
Claim 15
Dependent Claim
20 words
A CRT in accordance with claim 13 wherein from 3 to 12 spray passes are used to apply said solution.
Claim 16
Dependent Claim
18 words
A CRT in accordance with claim 1 wherein said alcohol is a C 1 -C 4 aliphatic alcohol.
Claim 17
Dependent Claim
12 words
A CRT in accordance with claim 15 wherein said alcohol is ethanol.
Claim 18
Dependent Claim
26 words
A CRT in accordance with claim 1 wherein said saturated hydrocarbon is present in said solution at a level of from about 0.1% to about 10%.
Claim 19
Dependent Claim
26 words
A CRT in accordance with claim 17 wherein said saturated hydrocarbon is present in said solution at a level of from about 0.2% to about 1%.
Claim 20
Dependent Claim
24 words
A CRT in accordance with claim 1 wherein said silane is selected from the group consisting of tetraalkoxy silanes, tetraaryloxy silanes and halogenated silanes.
Claim 21
Dependent Claim
22 words
A CRT in accordance with claim 19 wherein said silane is selected from the group consisting of tetrachlorosilane, trichlorosilane, tetramethoxysilane and tetraethoxysilane.
Claim 22
Dependent Claim
82 words
A CRT in accordance with claim 20 wherein said silane is a halogenated silane which is present in said solution at a level of from about 0.5 to about 50%, said saturated hydrocarbon is present in said solution at a level of from about 0.1% to about 10%, said alcohol is present in said solution at a level of from about 55% to about 95% and water is present in said solution at a level of from about 5% to about 45%.
Claim 23
Dependent Claim
102 words
In a cathode ray tube, a front panel having on a first surface an antiglare, antistatic coating resulting from application of a solution of a silane and a saturated hydrocarbon selected from the group consisting of saturated straight chain paraffinic hydrocarbons having the formula C n H 2n+2 and saturated cyclic napthenic hydrocarbons having the formula C n H 2n in a solvent system comprising alcohol and water, said coating having a distinctive topography of a random distribution of substantially uniform undulations which are of uniform texture and which is substantially devoid of craters or other circular formations suggestive of particle spattering.
Claim 24
Dependent Claim
102 words
In a cathode ray tube, a front panel having on a first surface an antiglare, antistatic coating resulting from application of a solution of a silane and a saturated hydrocarbon selected from the group consisting of saturated straight chain paraffinic hydrocarbons having the formula C n H 2n+2 and saturated cyclic napthenic hydrocarbons having the formula C n H 2n in a solvent system comprising alcohol and water, said coating having a distinctive topography of a random distribution of substantially uniform undulations which are of uniform texture and which is substantially devoid of craters or other circular formations suggestive of particle spattering.
Claim 25
Dependent Claim
16 words
A CRT in accordance with claim 22 wherein the gloss is less than about 45 percent.
Claim 26
Dependent Claim
26 words
A CRT in accordance with claim 22 wherein a 25 Kv surface charge is reduced to less than 1 Kv in less than about 50 seconds.
Claim 27
Dependent Claim
82 words
A CRT having a surface with reduced gloss comprising a CRT having a coating on the surface thereof, said coating being provided by applying fine droplets of a solution consisting essentially of a silane and a saturated hydrocarbon in a solvent system comprising an alcohol and water onto the surface of said CRT and curing the silane and saturated hydrocarbon for a period of time sufficient to convert said silane to a siloxane coating on the surface of said cathode ray tube.
Claim 28
Dependent Claim
82 words
A CRT having a surface with reduced gloss comprising a CRT having a coating on the surface thereof, said coating being provided by applying fine droplets of a solution consisting essentially of a silane and a saturated hydrocarbon in a solvent system comprising an alcohol and water onto the surface of said CRT and curing the silane and saturated hydrocarbon for a period of time sufficient to convert said silane to a siloxane coating on the surface of said cathode ray tube.
Claim 29
Dependent Claim
20 words
A CRT in accordance with claim 25 wherein said saturated hydrocarbon is selected from kerosene, jet fuel and mixtures thereof.
Claim 30
Dependent Claim
43 words
A CRT in accordance with claim 25 wherein said silane is present on the surface of said cathode ray tube at a level of from about 0.3 to about 1.2 milligrams per square centimeter of said surface area of said cathode ray tube.
Claim 31
Dependent Claim
23 words
A CRT in accordance with claim 25 wherein said solution is applied by spraying a fine mist of said solution onto said surface.
Claim 32
Dependent Claim
34 words
A CRT in accordance with claim 25 wherein said silane is present in said solution at a level of from about 0.5 percent to about 50 percent, based on the weight of said solution.
Claim 33
Dependent Claim
12 words
A CRT in accordance with claim 25 wherein said alcohol is propanol.
Claim 34
Dependent Claim
22 words
A CRT in accordance with claim 25 wherein said solution droplets have a diameter of from about 0.3 to about 0.5 microns.
Claim 35
Dependent Claim
82 words
A CRT in accordance with claim 25 wherein said silane is an alkoxy or aryloxy silane which is present in said solution at a level of from about 0.5% to about 50%, said saturated hydrocarbon is present in said solution at a level of from about 0.1% to about 10%, said alcohol is present in said solution at a level of from 0% to about 95% and said water is present in said solution at a level of from 5% to 100%.
Claim 36
Dependent Claim
26 words
A CRT in accordance with claim 25 wherein said saturated hydrocarbon is present in said solution at a level of from about 0.1% to about 10%.
Claim 37
Dependent Claim
26 words
A CRT in accordance with claim 33 wherein said saturated hydrocarbon is present in said solution at a level of from about 0.2% to about 1%.
Claim 38
Dependent Claim
43 words
A CRT in accordance with claim 25 wherein said saturated hydrocarbon is selected from the group consisting of saturated straight chain paraffinic hydrocarbons having the formula C n H 2n+2 and saturated cyclic napthenic hydrocarbons having the formula C n H 2n .
Claim 39
Dependent Claim
17 words
A CRT in accordance with claim 35 wherein n is an integer of from 8 to 16.
Claim 40
Dependent Claim
23 words
A CRT in accordance with claim 25 wherein said surface of said cathode ray tube is preheated prior to application of said solution.
Claim 41
Dependent Claim
34 words
A CRT in accordance with claim 37 wherein said cathode ray tube is preheated to a temperature in the range of from about 70° C. to about 120° C. prior to applying said solution.
Claim 42
Dependent Claim
43 words
A CRT in accordance with claim 37 wherein said silane is present on the surface of said cathode ray tube at a level of from about 0.3 to about 1.2 milligrams per square centimeter of said surface area of said cathode ray tube.
Claim 43
Dependent Claim
24 words
A CRT in accordance with claim 25 wherein said solution is applied to said surface of said cathode ray tube by multiple spray passes.
Claim 44
Dependent Claim
20 words
A CRT in accordance with claim 40 wherein from 3 to 12 spray passes are used to apply said solution.
Claim 45
Dependent Claim
18 words
A CRT in accordance with claim 25 wherein said alcohol is a C 1 -C 4 aliphatic alcohol.
Claim 46
Dependent Claim
12 words
A CRT in accordance with claim 42 wherein said alcohol is ethanol.
Claim 47
Dependent Claim
24 words
A CRT in accordance with claim 25 wherein said silane is selected from the group consisting of tetraalkoxy silanes, tetraaryloxy silanes and halogenated silanes.
Claim 48
Dependent Claim
22 words
A CRT in accordance with claim 44 wherein said silane is selected from the group consisting of tetrachlorosilane, trichlorosilane, tetramethoxysilane and tetraethoxysilane.
Claim 49
Dependent Claim
82 words
A CRT in accordance with claim 45 wherein said silane is a halogenated silane which is present in said solution at a level of from about 0.5 to about 50%, said saturated hydrocarbon is present in said solution at a level of from about 0.1% to about 10%, said alcohol is present in said solution at a level of from about 55% to about 95% and water is present in said solution at a level of from about 5% to about 45%.
Claim 50
Dependent Claim
73 words
In a cathode ray tube, a front panel having on first surface an antiglare, antistatic coating resulting from application of a solution consisting essentially of a silane and a saturated hydrocarbon in a solvent system comprising alcohol and water, said coating having a distinctive topography of a random distribution of substantially uniform undulations which are of uniform texture and which is substantially devoid of craters or other circular formations suggestive of particle spattering.
Claim 51
Dependent Claim
73 words
In a cathode ray tube, a front panel having on first surface an antiglare, antistatic coating resulting from application of a solution consisting essentially of a silane and a saturated hydrocarbon in a solvent system comprising alcohol and water, said coating having a distinctive topography of a random distribution of substantially uniform undulations which are of uniform texture and which is substantially devoid of craters or other circular formations suggestive of particle spattering.
Claim 52
Dependent Claim
16 words
A CRT in accordance with claim 47 wherein the gloss is less than about 45 percent.
Claim 53
Dependent Claim
26 words
A CRT in accordance with claim 47 wherein a 25 Kv surface charge is reduced to less than 1 Kv in less than about 50 seconds.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-22 | 1996-03-23 | 1996-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-22 | 2000-03-23 | 2000-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-22 | 2004-03-23 | 2004-09-22 | $7700.00 | Window Closed / Lapsed |