US4263335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airless spray method for depositing electroconductive tin oxide coatings
Assignee: PPG Industries Inc
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Filing: 1979-09-26
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Granted: 1981-04-21
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Expires: 1999-09-26
Abstract
Abstract Electroconductive tin oxide coatings are deposited by an airless method of spraying a liquid composition of a thermally decomposable tin compound onto a hot glass surface in order to prevent overspray of the liquid coating composition onto the opposite glass surface.
Inventors
- 👤 William E. Wagner
- 👤 James A. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:27
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/16; B05B5/1608; B05B5/1616; C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/25; C03C17/253; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/211; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/112
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
In a method for forming a film on a nonmetallic substrate by thermal decomposition of a metal-containing coating reactant, a solution of which is sprayed onto a primary surface at a temperature sufficient to thermally decompose the coating reactant, the improvement which comprises: spraying the coating solution in the absence of atomizing air using hydraulic pressure to form a spray.
Claim 2
Dependent Claim
60 words
In a method for forming a film on a nonmetallic substrate by thermal decomposition of a metal-containing coating reactant, a solution of which is sprayed onto a primary surface at a temperature sufficient to thermally decompose the coating reactant, the improvement which comprises: spraying the coating solution in the absence of atomizing air using hydraulic pressure to form a spray.
Claim 3
Dependent Claim
31 words
The improved method according to claim 1, wherein the substrate is glass and the coating solution comprises an organic tin compound which thermally decomposes to form an electroconductive tin oxide film.
Claim 4
Dependent Claim
25 words
The improved method according to claim 2, wherein the solution is delivered through a spray nozzle wherein the pressure is from 400 to 1500 p.s.i.
Claim 5
Dependent Claim
29 words
The improved method according to claim 3, wherein the coating solution comprises an organic tin compound and an ionizable fluorine containing compound at a pH between 4.5 and 7.
Claim 6
Dependent Claim
16 words
The improved method according to claim 4, wherein the coating solution comprises an organic tin fluoride.
Claim 7
Dependent Claim
37 words
The improved method according to any one of claims 2, 3, 4 or 5 wherein the glass substrate is maintained at a temperature at which the glass surface is conductive and the coating solution is electrostatically charged.
Claim 8
Dependent Claim
16 words
The improved method according to claim 6, wherein the coating solution further comprises a polar solvent.
Claim 9
Dependent Claim
28 words
The improved method according to claim 7, wherein a grounded metal plate is placed behind the glass substrate spaced from the surface opposite the primary surface being coated.
Claim 10
Independent Claim
110 words
A method for depositing an electroconductive tin oxide coating onto a glass substrate comprising the steps of: a. preparing an electrically nonconductive coating solution comprising a thermally decomposable tin compound and a polar solvent; b. atomizing said solution by means of hydraulic pressure; c. placing an electrostatic charge on said solution; d. heating a glass substrate to a temperature sufficient to thermally decompose the tin compound; e. placing a grounded metal plate in substantially parallel facing spaced relationship from one primary surface of the glass substrate; and f. applying said atomized coating solution to the primary surface of said heated glass substrate opposite the surface facing said grounded metal plate.
Claim 11
Independent Claim
110 words
A method for depositing an electroconductive tin oxide coating onto a glass substrate comprising the steps of: a. preparing an electrically nonconductive coating solution comprising a thermally decomposable tin compound and a polar solvent; b. atomizing said solution by means of hydraulic pressure; c. placing an electrostatic charge on said solution; d. heating a glass substrate to a temperature sufficient to thermally decompose the tin compound; e. placing a grounded metal plate in substantially parallel facing spaced relationship from one primary surface of the glass substrate; and f. applying said atomized coating solution to the primary surface of said heated glass substrate opposite the surface facing said grounded metal plate.
Claim 12
Dependent Claim
21 words
The method according to claim 9 wherein said coating solution comprises an organic tin compound, an ionizable fluorine-containing compound and methanol.
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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |