US4560581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing lithium-silicate glare-reducing coating
Assignee: RCA Licensing Corp
•
Filing: 1985-04-15
•
Granted: 1985-12-24
•
Expires: 2005-04-15
Abstract
Abstract A glare-reducing coating, as for the surface of the viewing window of a cathode-ray tube, is prepared by (a) warming a glass support above room temperature, (b) coating a surface of the warm support with an aqueous solution containing a lithium-stabilized silica sol and drying the deposited coating, (c) washing the dry coating with water and (d) baking the washed coating, preferrably at about 90° C.
Inventors
- 👤 Samuel B. Deal
- 👤 Donald W. Bartch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:33
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
65 words
A method for preparing an optical viewing screen having a glare-reducing viewing surface comprising (a) warming a glass support to temperatures above room temperature, (b) coating a surface of said warm support with an aqueous solution containing lithium-stabilized silica sol, and drying the deposited coating, (c) washing said dry coating with water, (d) and then, subsequent to said washing step (c), baking said washed coating.
Claim 2
Independent Claim
65 words
A method for preparing an optical viewing screen having a glare-reducing viewing surface comprising (a) warming a glass support to temperatures above room temperature, (b) coating a surface of said warm support with an aqueous solution containing lithium-stabilized silica sol, and drying the deposited coating, (c) washing said dry coating with water, (d) and then, subsequent to said washing step (c), baking said washed coating.
Claim 3
Dependent Claim
20 words
The method defined in claim 1 wherein, at step (d) said washed coating is baked at temperatures below 100° C.
Claim 4
Dependent Claim
23 words
The method defined in claim 2 wherein, at step (d), said washed coating is baked at about 90° C. for about 10 minutes.
Claim 5
Dependent Claim
50 words
The method defined in claim 1 where, at step (c), said dry coating is washed for about 10 to 60 seconds in a limp stream of water having a temperature of about 49° to 60° C., and then dried with forced air at about 60° to 70° C. impinging thereon.
Claim 6
Dependent Claim
21 words
The method defined in claim 1 wherein, at step (a), said glass support is warmed to about 40° to 80° C.
Claim 7
Dependent Claim
16 words
The method defined in claim 5 wherein said glass support is warmed to about 55° C.
Claim 8
Independent Claim
79 words
A method for preparing an optical viewing screen having a glare-reducing viewing surface comprising: (a) warming a glass support to temperatures of about 40° to 80° C., (b) coating a surface of said warm support with an aqueous solution consisting essentially of lithium-stabilized silica sol, said coating becoming dry after deposition upon said warm support, (c) washing said dry coating with warm water (d) and then, after washing step (c), baking said washed coating at temperatures below 100° C.
Claim 9
Independent Claim
79 words
A method for preparing an optical viewing screen having a glare-reducing viewing surface comprising: (a) warming a glass support to temperatures of about 40° to 80° C., (b) coating a surface of said warm support with an aqueous solution consisting essentially of lithium-stabilized silica sol, said coating becoming dry after deposition upon said warm support, (c) washing said dry coating with warm water (d) and then, after washing step (c), baking said washed coating at temperatures below 100° C.
Claim 10
Dependent Claim
19 words
The method defined in claim 7 wherein, at step (d), said washed coating is baked at about 90° C.
Claim 11
Dependent Claim
26 words
The method defined in claim 7 wherein, at step (c), said dry coating is washed in water having a temperature of about 45° to 65° C.
Claim 12
Dependent Claim
20 words
The method defined in claim 7 wherein, at step (b), said surface is sprayed with multiple passes of said solution.
Claim 13
Dependent Claim
20 words
The method defined in claim 7 wherein, at step (a), said support is warmed to temperatures of about 55° C.
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) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |