US5124832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated and sealed electrochromic window
Assignee: PPG Industries Ohio Inc
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Filing: 1989-09-29
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Granted: 1992-06-23
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Expires: 2009-09-29
Abstract
Abstract An electrochromic transparency comprising an electrochromic film and a preformed, preconditioned ion-conductive polymer sheet laminated between a pair of electrode bearing cell members is disclosed wherein the optimum moisture content of the ion-conducting polymer sheet is maintained by means of a moisture vapor barrier surrounding the perimeter of the cell.
Inventors
- 👤 Charles B. Greenberg
- 👤 Thomas G. Rukavina
- 👤 David E. Singleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:30
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1525; G02F1/153; G02F1/155; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/181
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
92 words
An article of manufacture having variable transmittance in response to an electric field comprising: a. a first transparent substrate; b. an electroconductive electrode member; c. a transparent electrochromic film in contact with said electroconductive electrode member; d. a preformed, preconditioned ion-conductive polymer sheet in contact with said electrochromic film; e. a counter electrode in contact with said ion-conductive polymer sheet; f. a second transparent substrate which in combination with said first transparent substrate form the walls of an electrochromic cell; and g. a moisture vapor barrier surrounding the perimeter of said cell.
Claim 2
Dependent Claim
92 words
An article of manufacture having variable transmittance in response to an electric field comprising: a. a first transparent substrate; b. an electroconductive electrode member; c. a transparent electrochromic film in contact with said electroconductive electrode member; d. a preformed, preconditioned ion-conductive polymer sheet in contact with said electrochromic film; e. a counter electrode in contact with said ion-conductive polymer sheet; f. a second transparent substrate which in combination with said first transparent substrate form the walls of an electrochromic cell; and g. a moisture vapor barrier surrounding the perimeter of said cell.
Claim 3
Dependent Claim
12 words
An article according to claim 1, wherein said transparent substrate is glass.
Claim 4
Dependent Claim
28 words
An article according to claim 1, wherein said electroconductive electrode member is a transparent film selected from the group consisting of tin oxide, indium oxide and mixtures thereof.
Claim 5
Dependent Claim
26 words
An article according to claim 1, wherein said counterelectrode is a grid comprising a metal selected from the group consisting of nickel, copper and mixtures thereof.
Claim 6
Dependent Claim
48 words
An article according to claim 1, wherein said transparent electrochromic film comprises an electrochromic material selected from the group consisting of transition metal oxides, transition metal sulfides, transition metal oxysulfides, transition metal halides, selenides, tellurides, chromates, molybdates, tungstates, vanadates, niobates, tantalates, titanates, stannates, polyaniline, polythiophene, polyisothianaphthene and polypyrrole.
Claim 7
Dependent Claim
21 words
An article according to claim 5, wherein said electrochromic film comprises tungsten oxide at a thickness of 1000 to 4000 Angstroms.
Claim 8
Dependent Claim
14 words
An article according to claim 1, wherein said ion-conductive polymer sheet comprises 2-acrylamido-2-methylpropanesulfonic acid.
Claim 9
Dependent Claim
26 words
An article according to claim 7, wherein the ion-conductive polymer sheet contains water in a molar ratio of 1.5:1 to 3.9:1 water to 2-acrylamido-2-methylpropane sulfonic acid.
Claim 10
Dependent Claim
14 words
An article according to claim 1, wherein said moisture vapor barrier comprises butyl rubber.
Claim 11
Dependent Claim
21 words
An article according to claim 9, wherein said butyl rubber is in the form of a butyl rubber-backed metal foil tape.
Claim 12
Independent Claim
63 words
A method for producing an electrochromic cell comprising the steps of: a. forming a sheet of polymer electrolyte; b. conditioning said sheet to a desired moisture content; c. laminating said sheet between a pair of transparent substrates encompassing transparent electrodes and a transparent electrochromic film to form an electrochromic cell; and d. sealing the perimeter of said cell with a moisture vapor barrier.
Claim 13
Independent Claim
63 words
A method for producing an electrochromic cell comprising the steps of: a. forming a sheet of polymer electrolyte; b. conditioning said sheet to a desired moisture content; c. laminating said sheet between a pair of transparent substrates encompassing transparent electrodes and a transparent electrochromic film to form an electrochromic cell; and d. sealing the perimeter of said cell with a moisture vapor barrier.
Claim 14
Dependent Claim
24 words
A method according to claim 11, wherein said sheet of polymer electrolyte is formed by casting a solution of 2-acrylamido-2-methylpropane sulfonic acid and curing.
Claim 15
Dependent Claim
43 words
A method according to claim 12, wherein said sheet is conditioned by exposure to a sufficient temperature and relative humidity for a time sufficient to yield a molar ratio of water to 2-acrylamido-2-methylpropane sulfonic acid monomer in the range of 1.5:1 to 3.9:1.
Claim 16
Dependent Claim
21 words
A method according to claim 11, wherein said sheet is laminated under heat and pressure between a pair of glass sheets.
Claim 17
Dependent Claim
34 words
A method according to claim 14, wherein said laminating is performed at a temperature of about 200° to 225° F. (about 93° to 107° C.) and pressure of about 150 pounds per square inch.
Claim 18
Dependent Claim
21 words
A method according to claim 15, wherein said sealing is accomplished by applying butyl rubber about the perimeter of said cell.
Claim 19
Dependent Claim
24 words
A method according to claim 16, wherein said butyl rubber is applied by pressing a butyl rubber bead along the perimeter of said cell.
Claim 20
Dependent Claim
22 words
A method according to claim 16, wherein said butyl rubber is applied in the form of a butyl rubber-backed metal foil tape.
Claim 21
Dependent Claim
18 words
A method according to claim 18 wherein said tape overlaps the front and back surfaces of said cell.
Claim 22
Dependent Claim
19 words
A method according to claim 19, wherein said sealing further comprises applying a butyl rubber bead under said tape.
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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) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |