EP0239280A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Protective overcoat for solar-shielding films
Assignee: Individual
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Filing: 1987-03-10
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Granted: —
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Expires: 2007-03-10
Abstract
Abstract Transparent glass sheets (10) comprising thereon titanium-nitride as the principal solar screening layer (24) for reducing transmission of near infrared and, thereover, a layer of tin oxide (26) of about 300 to 800 angstroms thick. The tin oxide layer serves to protect the titanium nitride from oxidation during high-temperature processing procedures, increases the abrasion-resistance, and, at roughly the midpoint of the 300 to 800 angstrom range, is useful in reducing the colour and visible reflectivity properties of some titanium nitride films. In practice, some of the tin oxide (22), that is not required for physical protection of the TiN or visual effective, can be positioned between the nitride and the glass substrate.
Inventors
- 👤 Roy Gerald Gordon
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 01:09
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3435; G02B1/105; G; G02; G02B; G02B1/00; G02B1/10; G02B1/14
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
77 words
A solar screening transparent sheet product characterised by oxidation resistance even during annealing, tempering, bending or other processes at temperatures above about 800°F (426.5°C), said product having; a) an exterior film (14,26) of tin oxide forming means to mechanically and chemically protect an inorganic solar-shielding film; b) said film (12,24) under said tin oxide and forming the principal barrier to near infrared radiation of such product; and c) a substrate (10) of transparent glass under said film.
Claim 2
Dependent Claim
77 words
A solar screening transparent sheet product characterised by oxidation resistance even during annealing, tempering, bending or other processes at temperatures above about 800°F (426.5°C), said product having; a) an exterior film (14,26) of tin oxide forming means to mechanically and chemically protect an inorganic solar-shielding film; b) said film (12,24) under said tin oxide and forming the principal barrier to near infrared radiation of such product; and c) a substrate (10) of transparent glass under said film.
Claim 3
Dependent Claim
20 words
A solar screening sheet product as defined in claim 1 wherein said solar-shielding film (12,24) is formed of a nitride.
Claim 4
Dependent Claim
20 words
A solar screening sheet product as defined in claim 2 wherein said solar-shielding film (12,24) is formed of chromium nitride.
Claim 5
Dependent Claim
19 words
A solar screening sheet as defined in claim 2 wherein said solar-shielding film (12,24) is formed of titanium nitride.
Claim 6
Dependent Claim
31 words
A transparent sheet product as defined in any one of claims 2 to 4 comprising a second film (22) of tin oxide between said nitride (24) and said glass substrate (10).
Claim 7
Dependent Claim
50 words
A sheet product as defined in claim 5 wherein each of said exterior film (26) of tin oxide and said second film (22) of tin oxide are about 500 angstroms thick and wherein said nitride film (24) is a titanium nitride film and is at least about 300 angstroms thick.
Claim 8
Dependent Claim
20 words
A sheet product as defined in claim 5 wherein said tin oxide films (22,26) total about 1000 angstroms in thickness.
Claim 9
Dependent Claim
18 words
A sheet product as defined in claim 5 wherein said titanium nitride film is about 700 angstroms thick.
Claim 10
Dependent Claim
28 words
A sheet product as defined in any preceeding claim wherein said exterior film of tin oxide is in a range of from about 300 to 800 angstroms thick.
Claim 11
Dependent Claim
21 words
A sheet product as defined in any preceding claim wherein said exterior film of tin oxide is about 500 angstroms thick.
Claim 12
Dependent Claim
31 words
A sheet product as defined in any preceding claim wherein said exterior film of tin oxide is a means to provide abrasion resistance superior to the abrasion resistance of titanium nitride.
Claim 13
Dependent Claim
56 words
A sheet product as defined in claim 1 wherein said solar shielding film is a titanium nitride layer sufficiently thick to exhibit a coloured reflection characteristic when said nitride layer is uncoated and wherein said exterior film of tin oxide is of a thickness effective to substantially reduce said coloured reflection characteristics in said sheet product.
Claim 14
Dependent Claim
30 words
A product as defined in claim 11 wherein said nitride film is about 1700 angstroms thick and wherein said exterior film of tin oxide is at least 500 angstroms thick.
Claim 15
Dependent Claim
74 words
A process for making a transparent sheet product comprising a layer of titanium nitride as a means to reduce near infrared radiation from penetrating the coated glass, said process comprising the steps of: a) coating said glass with an effective thickness of titanium or chromium nitride forming means to reduce passage of said near infrared radiation; and b) thereupon overcoating said titanium nitride with a coating from 300 to 800 angstroms of tin oxide.
Claim 16
Dependent Claim
74 words
A process for making a transparent sheet product comprising a layer of titanium nitride as a means to reduce near infrared radiation from penetrating the coated glass, said process comprising the steps of: a) coating said glass with an effective thickness of titanium or chromium nitride forming means to reduce passage of said near infrared radiation; and b) thereupon overcoating said titanium nitride with a coating from 300 to 800 angstroms of tin oxide.
Claim 17
Dependent Claim
90 words
A process for making an annealed transparent sheet product comprising a layer of titanium nitride or chromium nitride as a means to reduce near infrared radiation from penetrating the coated glass, said process comprising the steps of: a) coating said glass with an effective thickness of titanium nitride forming means to reduce passage of said near infrared radiation; b) thereupon overcoating said titanium nitride with a coating from 300 to 800 angstroms of tin oxide; and c) and annealing said glass sheet at a temperature in excess of 1000°F (538°C).
Claim 18
Dependent Claim
90 words
A process for making an annealed transparent sheet product comprising a layer of titanium nitride or chromium nitride as a means to reduce near infrared radiation from penetrating the coated glass, said process comprising the steps of: a) coating said glass with an effective thickness of titanium nitride forming means to reduce passage of said near infrared radiation; b) thereupon overcoating said titanium nitride with a coating from 300 to 800 angstroms of tin oxide; and c) and annealing said glass sheet at a temperature in excess of 1000°F (538°C).
Claim 19
Dependent Claim
89 words
A process for making a tempered transparent sheet product comprising a layer of titanium nitride or chromium nitride as a means to reduce near infrared radiation from penetrating the glass, said process comprising the steps of: a) coating said glass with an effective thickness of titanium nitride forming means to reduce passage of said near infrared radiation; b) thereupon overcoating said titanium nitride with a coating from 300 to 800 angstroms of tin oxide; and c) and tempering said glass sheet at a temperature in excess of 1000°F (538°C).
Claim 20
Dependent Claim
89 words
A process for making a tempered transparent sheet product comprising a layer of titanium nitride or chromium nitride as a means to reduce near infrared radiation from penetrating the glass, said process comprising the steps of: a) coating said glass with an effective thickness of titanium nitride forming means to reduce passage of said near infrared radiation; b) thereupon overcoating said titanium nitride with a coating from 300 to 800 angstroms of tin oxide; and c) and tempering said glass sheet at a temperature in excess of 1000°F (538°C).
Claim 21
Dependent Claim
42 words
A process as defined in claim 14 wherein said coating and overcoating steps are carried out within the reducing atmosphere of a tin float bath enclosure of a float glass production line and upon glass sheet formed in said tin float bath.
Claim 22
Dependent Claim
95 words
A solar screening transparent sheet product characterised by oxidation resistance even during annealing, tempering, bending or other processes at temperatures above about 800°F (426.5°C) and product having: a) an exterior film of a protective oxide selected from tin, silicon, and aluminium oxides or mixtures thereof forming means to mechanically and chemically protect a film of titanium nitride or chromium nitride; b) said film of titanium nitride under said protective oxide and forming the principal barrier to near infrared radiation of such product; and c) a substrate of transparent glass under said film of said nitride.
Claim 23
Dependent Claim
95 words
A solar screening transparent sheet product characterised by oxidation resistance even during annealing, tempering, bending or other processes at temperatures above about 800°F (426.5°C) and product having: a) an exterior film of a protective oxide selected from tin, silicon, and aluminium oxides or mixtures thereof forming means to mechanically and chemically protect a film of titanium nitride or chromium nitride; b) said film of titanium nitride under said protective oxide and forming the principal barrier to near infrared radiation of such product; and c) a substrate of transparent glass under said film of said nitride.
Claim 24
Dependent Claim
15 words
A sheet product as defined in claim 18 wherein said protective oxide is tin oxide.
References Cited (Backward Citations)
No citation records indexed.
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