US4308319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrolytic deposition of a cobalt/tin oxide spinel film
Assignee: PPG Industries Inc
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Filing: 1980-06-09
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Granted: 1981-12-29
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Expires: 2000-06-09
Abstract
Abstract Pyrolytic deposition of a durable, uniform, electrically nonconductive solar energy reflecting spinel-type film from an aqueous solution of a water soluble cobalt salt and a water soluble tin compound is disclosed.
Inventors
- 👤 Joseph E. Michelotti
- 👤 Stanley M. Ohlberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:51
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/25; C03C17/253; C01; C01G; C01G23/00; C01G23/04; C01G51/00; C01G51/04; C01P; C01P2002/00; C01P2002/30; C01P2002/32; C01P2002/50; C01P2002/52; C01P2006/00; C01P2006/60; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/112
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
A method for depositing an electrically nonconductive spinel-type film comprising the oxides of cobalt and tin on a glass substrate comprising the steps of: a. maintaining a substrate in an oxidizing atmosphere at a temperature sufficient to pyrolyze metal compounds to metal oxides; b. contacting the surface of the substrate at said temperature with an aqueous solution consisting essentially of water, a water soluble cobalt salt and a water soluble tin compound capable of thermal decomposition to cobalt oxide and tin oxide; and c. thermally reacting said cobalt salt and said tin compound in said oxidizing atmosphere to form an electrically nonconductive film comprising a cobalt/tin oxide spinel wherein cobalt is the predominant metal in the film.
Claim 2
Independent Claim
117 words
A method for depositing an electrically nonconductive spinel-type film comprising the oxides of cobalt and tin on a glass substrate comprising the steps of: a. maintaining a substrate in an oxidizing atmosphere at a temperature sufficient to pyrolyze metal compounds to metal oxides; b. contacting the surface of the substrate at said temperature with an aqueous solution consisting essentially of water, a water soluble cobalt salt and a water soluble tin compound capable of thermal decomposition to cobalt oxide and tin oxide; and c. thermally reacting said cobalt salt and said tin compound in said oxidizing atmosphere to form an electrically nonconductive film comprising a cobalt/tin oxide spinel wherein cobalt is the predominant metal in the film.
Claim 3
Dependent Claim
41 words
The method according to claim 1 wherein the solution comprises a tin compound selected from the group consisting of tin chlorides and alkyltin chlorides and a cobalt salt selected from the group consisting of cobalt acetate, cobalt nitrate and cobalt perchlorate.
Claim 4
Dependent Claim
15 words
The method according to claim 2 wherein the solution comprises dimethyltin dichloride and cobalt acetate.
Claim 5
Dependent Claim
33 words
The method according to claim 3 wherein the ratio of cobalt to tin is from 5:1 to 12:1 and the total concentration of metal in the solution ranges from 5 to 6 percent.
Claim 6
Dependent Claim
14 words
The method according to claim 3 wherein the substrate is a nonmetallic refractory material.
Claim 7
Dependent Claim
59 words
A coated glass article comprising an electrically nonconducting film comprising a cobalt/tin oxide spinel wherein the cobalt is the predominant metal in said film prepared by contacting a glass surface at a temperature greater than 500° F. (about 260° C.) with an aqueous solution consisting essentially of water, a water soluble cobalt salt and a water soluble tin compound.
Claim 8
Dependent Claim
59 words
A coated glass article comprising an electrically nonconducting film comprising a cobalt/tin oxide spinel wherein the cobalt is the predominant metal in said film prepared by contacting a glass surface at a temperature greater than 500° F. (about 260° C.) with an aqueous solution consisting essentially of water, a water soluble cobalt salt and a water soluble tin compound.
Claim 9
Dependent Claim
92 words
A glass article according to claim 6 wherein the glass surface is contacted at a temperature of about 1000° to 1200° F. (about 538° to 650° C.) with an aqueous solution of a cobalt salt selected from the group consisting of cobalt acetate, cobalt nitrate and cobalt perchlorate and a tin compound selected from the group consisting of tin chlorides and alkyltin chlorides wherein the ratio of cobalt to tin in the solution is from 5:1 to 12:1 and the total metal concentration in the solution is from 5 to 6 percent.
Claim 10
Dependent Claim
91 words
A glass article according to claim 7 which has the following properties with respect to Illuminant C: luminous transmittance--30 to 50 percent, dominant wavelength of transmitted light 575 to 580 nanometers, excitation purity of transmitted light--10 to 25 percent; from the coated surface: luminous reflectance--25 to 40 percent, dominant wavelength of reflected light--555 to 575 nanometers, excitation purity of reflected light--4 to 12 percent; from the uncoated surface: luminous reflectance 20 to 30 percent, dominant wavelength of reflected light--550 to 570 nanometers, and excitation purity of reflected light--4 to 12 percent.
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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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |