Patent US4853257A successfully refreshed from Google Patents.
US4853257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical vapor deposition of tin oxide on float glass in the tin bath
Assignee: PPG Industries Ohio Inc
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Filing: 1987-09-30
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Granted: 1989-08-01
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Expires: 2007-09-30
Abstract
Abstract A method is disclosed for producing a low emissivity metal oxide film on a glass surface within a nonoxidizing atmosphere inside a float bath by applying a metal-containing coating reactant in vapor form in the pressure of oxygen to the top surface of a float glass ribbon while the bottom surface is maintained in contact with a molten metal bath in a nonoxidizing atmosphere at a temperature sufficient to thermally react said reactant to form a metal oxide film on the glass surface.
Inventors
- 👤 Vern A. Henery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:58
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C03C17/2453; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C23C16/407
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
111 words
A method for depositing a low emissivity metal oxide coating comprising the steps of: a. supporting a glass substrate on a molten metal bath; b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate; c. contacting said glass substrate on the surface which is not supported on said molten metal bath with a vapor mixture comprising a metal-containing coating reactant in vapor form and oxygen; and d. thermally reacting said coating reactant vapor in the presence of said oxygen to deposit a metal oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere.
Claim 2
Independent Claim
111 words
A method for depositing a low emissivity metal oxide coating comprising the steps of: a. supporting a glass substrate on a molten metal bath; b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate; c. contacting said glass substrate on the surface which is not supported on said molten metal bath with a vapor mixture comprising a metal-containing coating reactant in vapor form and oxygen; and d. thermally reacting said coating reactant vapor in the presence of said oxygen to deposit a metal oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere.
Claim 3
Dependent Claim
12 words
A method according to claim 1, wherein said molten metal comprises tin.
Claim 4
Dependent Claim
14 words
A method according to claim 2, wherein said molten metal consists essentially of tin.
Claim 5
Dependent Claim
11 words
A method according to claim 1, wherein said atmosphere comprises nitrogen.
Claim 6
Dependent Claim
13 words
A method according to claim 4, wherein said atmosphere consists essentially of nitrogen.
Claim 7
Independent Claim
107 words
A method for depositing a low emissivity metal oxide coating comprising the steps of: a. supporting a glass substrate on a molten metal bath; b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate; c. contacting said glass substrate on the surface which is not supported on said molten metal bath with an organotin compound coating reactant in vapor form and oxygen; and d. thermally reacting said coating reactant in the presence of said oxygen to deposit a tin oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere.
Claim 8
Independent Claim
107 words
A method for depositing a low emissivity metal oxide coating comprising the steps of: a. supporting a glass substrate on a molten metal bath; b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate; c. contacting said glass substrate on the surface which is not supported on said molten metal bath with an organotin compound coating reactant in vapor form and oxygen; and d. thermally reacting said coating reactant in the presence of said oxygen to deposit a tin oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere.
Claim 9
Dependent Claim
13 words
A method according to claim 6, where said organotin compound is monobutyltin trichloride.
Claim 10
Independent Claim
126 words
A method for depositing a low emissivity metal oxide coating comprising the steps of: a. supporting a glass substrate on a molten metal bath; b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate; c. contacting said glass substrate on the surface which is not supported on said molten metal bath with a metal-containing coating reactant in vapor form and oxygen, wherein the temperature of the glass surface is in the range of 1150° to 1250° F. (610° to 677° C.); and d. thermally reacting said coating reactant in the presence of said oxygen to deposit a metal oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere.
Claim 11
Independent Claim
126 words
A method for depositing a low emissivity metal oxide coating comprising the steps of: a. supporting a glass substrate on a molten metal bath; b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate; c. contacting said glass substrate on the surface which is not supported on said molten metal bath with a metal-containing coating reactant in vapor form and oxygen, wherein the temperature of the glass surface is in the range of 1150° to 1250° F. (610° to 677° C.); and d. thermally reacting said coating reactant in the presence of said oxygen to deposit a metal oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere.
Claim 12
Dependent Claim
24 words
A method according to claim 8, wherein the temperature of the glass surface is about 1175° to 1225° F. (about 635° to 663° C.).
Claim 13
Dependent Claim
55 words
A method according to claim 1, wherein said glass substrate advances on said molten metal bath through a chamber containing a coating position, said coating reactant is applied to said glass surface in vapor form as said glass substrate advances through said coating position, and oxygen is present at said coating position in said vapor.
Claim 14
Dependent Claim
21 words
A method according to claim 10, wherein said coating reactant vapor is applied to said glass surface in a carrier gas.
Claim 15
Dependent Claim
21 words
A method according to claim 11, wherein said coating reactant is applied to said glass surface in an oxidizing carrier gas.
Claim 16
Dependent Claim
12 words
A method according to claim 12, wherein said carrier gas comprises air.
Claim 17
Dependent Claim
14 words
A method according to claim 13, wherein said carrier gas consists essentially of air.
References Cited (Backward Citations)
US3949146A
Cited
US4469045A
Cited
US4292347A
Cited
US4476158A
Cited
US4547400A
Cited
US4548836A
Cited
US4721632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |