US4790922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperable low emissivity and reflective windows
Assignee: WSA Inc A CORP OF WI
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Filing: 1987-07-13
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Granted: 1988-12-13
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Expires: 2007-07-13
Abstract
Abstract The invention relates to using titanium as a protective layer on either side of a layer of silver for making temperable low emissivity windows. The titanium layers will protect the silver layer from oxidizing when the glass is heated to shape the glass. The invention also can be used to protect a layer of stainless steel when making temperable reflective windows.
Inventors
- 👤 Russell Huffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:17
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3618; C03C17/3639; C03C17/3644; C03C17/3652; C03C17/3657; C03C17/366; C03C17/3681; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C14/083; C23C14/14; C23C14/18; C23C14/185; C03C2217/00; C03C2217/70; C03C2217/78
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
A method of making a temperable low emissivity window comprising the steps of sputtering a first layer of a mixture of tin oxide and zinc oxide onto a glass substrate, sputtering a second layer of titanium, sputtering a third layer of silver, sputtering a fourth layer of titanium, sputtering a fifth layer of a mixture of tin oxide and zinc oxide, sputtering a sixth layer of titanium oxide, then heating and shaping the glass at a temperature where the titanium layers on each side of the silver layer will oxidize but protect the silver from oxidizing.
Claim 2
Independent Claim
96 words
A method of making a temperable low emissivity window comprising the steps of sputtering a first layer of a mixture of tin oxide and zinc oxide onto a glass substrate, sputtering a second layer of titanium, sputtering a third layer of silver, sputtering a fourth layer of titanium, sputtering a fifth layer of a mixture of tin oxide and zinc oxide, sputtering a sixth layer of titanium oxide, then heating and shaping the glass at a temperature where the titanium layers on each side of the silver layer will oxidize but protect the silver from oxidizing.
Claim 3
Dependent Claim
31 words
A method of making a temperable low emissivity window as in claim 1 where the titanium layers on each side of the silver layer are between 50 and 150 angstroms thick.
Claim 4
Independent Claim
97 words
A method of making temperable reflective windows comprising the steps of sputtering a first layer of a mixture of tin oxide and zinc oxide onto a glass substrate, sputtering a second layer of titanium, sputtering a third layer of stainless steel, sputtering a fourth layer of titanium, sputtering a fifth layer of a mixture of tin oxide and zinc oxide, sputtering a sixth layer of titanium oxide, then heating and shaping the glass at a temperature where the titanium layers on each side of the stainless steel layer will oxidize but protect the stainless steel from oxidizing.
Claim 5
Independent Claim
97 words
A method of making temperable reflective windows comprising the steps of sputtering a first layer of a mixture of tin oxide and zinc oxide onto a glass substrate, sputtering a second layer of titanium, sputtering a third layer of stainless steel, sputtering a fourth layer of titanium, sputtering a fifth layer of a mixture of tin oxide and zinc oxide, sputtering a sixth layer of titanium oxide, then heating and shaping the glass at a temperature where the titanium layers on each side of the stainless steel layer will oxidize but protect the stainless steel from oxidizing.
Claim 6
Dependent Claim
31 words
A method of making a temperable reflective window as in claim 3 where the titanium layers on each side of the stainless steel layer are between 50 and 150 angstroms thick.
Claim 7
Independent Claim
249 words
A method of making a coated temperable window consisting of, using a five chamber sputtering machine having three cathodes per chamber, the first chamber having a first cathode of zinc, a second cathode of tin and a third cathode of zinc in an oxygen atmosphere which will coat a piece of glass with tin zinc oxide mixture layer, the second chamber has an argon atmosphere and has a first cathode of titanium, a second cathode of a metal and a third cathode of titanium, the second chamber coats the tin zinc oxide mixture with a layer of titanium, then coats the titanium with a layer of the metal and coats the metal with a layer of titanium, the third chamber having a first cathode of tin, a second cathode of zinc and a third cathode of tin in an oxygen atmosphere which will coat the titanium with a tin zinc oxide mixture layer, the fourth chamber having a first cathode of stainless steel, a second cathode of titanium and a third cathode of titanium in an oxygen atmosphere, only the second and third cathodes are turned on in this chamber to produce a titanium oxide layer, the fifth chamber has all three cathodes of titanium in an oxygen atmosphere to produce a titanium oxide layer, a heating and shaping the glass at a temperature where the heat oxidizes the titanium layers on each side of the metal layer but the titanium layers protect the metal layer from being oxidized.
Claim 8
Independent Claim
249 words
A method of making a coated temperable window consisting of, using a five chamber sputtering machine having three cathodes per chamber, the first chamber having a first cathode of zinc, a second cathode of tin and a third cathode of zinc in an oxygen atmosphere which will coat a piece of glass with tin zinc oxide mixture layer, the second chamber has an argon atmosphere and has a first cathode of titanium, a second cathode of a metal and a third cathode of titanium, the second chamber coats the tin zinc oxide mixture with a layer of titanium, then coats the titanium with a layer of the metal and coats the metal with a layer of titanium, the third chamber having a first cathode of tin, a second cathode of zinc and a third cathode of tin in an oxygen atmosphere which will coat the titanium with a tin zinc oxide mixture layer, the fourth chamber having a first cathode of stainless steel, a second cathode of titanium and a third cathode of titanium in an oxygen atmosphere, only the second and third cathodes are turned on in this chamber to produce a titanium oxide layer, the fifth chamber has all three cathodes of titanium in an oxygen atmosphere to produce a titanium oxide layer, a heating and shaping the glass at a temperature where the heat oxidizes the titanium layers on each side of the metal layer but the titanium layers protect the metal layer from being oxidized.
Claim 9
Dependent Claim
18 words
A method of making a temperable low emissivity window as in claim 5 where the metal is silver.
Claim 10
Dependent Claim
31 words
A method of making a temperable low emissivity window as in claim 6 where the titanium layers on each side of the silver layer are between 50 and 150 angstroms thick.
Claim 11
Dependent Claim
18 words
A method of making a temperable reflective window as in claim 5 where the metal is stainless steel.
Claim 12
Dependent Claim
32 words
A method of making a temperable low emissivity window as in claim 8 where the titanium layers on each side of the stainless steel layer are between 50 and 150 angstroms thick.
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) | 1991-12-13 | 1992-06-13 | 1992-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-13 | 1996-06-13 | 1996-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-13 | 2000-06-13 | 2000-12-13 | $7700.00 | Window Closed / Lapsed |