US5124080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic device
Assignee: Dow Chemical Co
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Filing: 1991-11-01
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Granted: 1992-06-23
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Expires: 2011-11-01
Abstract
Abstract An improvement of electrochromic devices incorporating a perfluorosulfonic acid polymer ion conducting layer interposed between a working electrode and a counter electrode. The improvement relates to the composition of the perfluorosulfonic acid polymer of the ion conducting layer. In the present invention the composition of the perfluorosulfonate polymer layer is a polymer comprising a substantially fluorinated backbone which has recurring pendant groups attached thereto represented by the formula --O--(CFR' f ) b --(CFR f ) a --SO 3 --, where a=0-3, b=0-3, a+b=at least 1, and R f and R' f are independently selected from the group consisting of a halogen and a substantially fluorinated alkyl group having one or more carbon atoms. One example of such a polymer is the copolymer of tetrafluoroethylene and 1,1,2,2-tetrafluoro-2-((trifluoroethenyl)oxy)ethane sulfonic acid having an equivalent weight of about 800. The primary benefit of the present invention is that the electrochromic device darkens sufficiently to be useful when the device is operated at high temperature such as can be encountered in an automobile electrochromic sun roof on a sunny day in a hot climate.
Inventors
- 👤 Mani Shabrang
- 👤 Susan J. Babinec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:19
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
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
102 words
In an improved electrochromic device comprising an electronic conductor, an electrochromic material, an ion conducting layer comprising perfluorosulfonate polymer and a counter electrode, wherein the improvement comprises: that the perfluorosulfonate polymer of the ion conducting layer comprises a polymer consisting essentially of a substantially fluorinated backbone which has recurring pendant groups attached thereto represented by the formula --O--(CFR' f ) b --(CFR f ) a --SO 3 --, where a=0-3, b=0--3, a+b=at least 1, and R f and R' f are independently selected from the group consisting of a halogen and a substantially fluorinated alkyl group having one or more carbon atoms.
Claim 2
Dependent Claim
102 words
In an improved electrochromic device comprising an electronic conductor, an electrochromic material, an ion conducting layer comprising perfluorosulfonate polymer and a counter electrode, wherein the improvement comprises: that the perfluorosulfonate polymer of the ion conducting layer comprises a polymer consisting essentially of a substantially fluorinated backbone which has recurring pendant groups attached thereto represented by the formula --O--(CFR' f ) b --(CFR f ) a --SO 3 --, where a=0-3, b=0--3, a+b=at least 1, and R f and R' f are independently selected from the group consisting of a halogen and a substantially fluorinated alkyl group having one or more carbon atoms.
Claim 3
Dependent Claim
55 words
The device of claim 1, wherein the formula is --O--(CFR' f ) b --(CFR f ) a --SO 3 --H + , where a=0-3, b=0-3, a+b=at least 1, R f and R' f are independently selected from the group consisting of a halogen and a substantially fluorinated alkyl group having one or more carbon atoms.
Claim 4
Dependent Claim
44 words
The device of claim 2, wherein the electronic conductor comprises a layer of a member of the group consisting of gold and indium/tin oxide, wherein the electrochromic material comprises a layer of tungsten oxide, and wherein the counter electrode comprises a layer of gold.
Claim 5
Dependent Claim
49 words
The device of claim 2, wherein the electronic conductor consists essentially of a layer of a member of the group consisting of gold and indium/tin oxide, wherein the electrochromic material consists essentially of a layer of tungsten oxide, and wherein the counterelectrode consists essentially of a layer of gold.
Claim 6
Dependent Claim
25 words
The device of claim 4, wherein the ion conducting layer consists essentially of a copolymer of FFC═CFF and FRC═CFF, where R is --O--CFF--CFF--SOOO-H + .
Claim 7
Dependent Claim
19 words
The device of claim 5, wherein the equivalent weight of the copolymer is between about 700 and about 1000.
Claim 8
Dependent Claim
31 words
The device of claim 1, wherein the electronic conductor is an essentially transparent electrically conducting material layered on a pane of material selected form the group consisting of glass and plastic.
Claim 9
Dependent Claim
31 words
The device of claim 2, wherein the electronic conductor is an essentially transparent electrically conducting material layered on a pane of material selected from the group consisting of glass and plastic.
Claim 10
Dependent Claim
31 words
The device of claim 3, wherein the electronic conductor is an essentially transparent layer of indium/tin oxide on a pane of material selected from the group consisting of glass and plastic.
Claim 11
Dependent Claim
31 words
The device of claim 4, wherein the electronic conductor is an essentially transparent layer of indium/tin oxide on a pane of material selected from the group consisting of glass and plastic.
Claim 12
Dependent Claim
31 words
The device of claim 5, wherein the electronic conductor is an essentially transparent layer of indium/tin oxide on a pane of material selected from the group consisting of glass and plastic.
Claim 13
Dependent Claim
31 words
The device of claim 6, wherein the electronic conductor is an essentially transparent layer of indium/tin oxide is a pane of material selected from the group consisting of glass and plastic.
Claim 14
Dependent Claim
31 words
The device of claim 7, wherein the electronic conductor is an essentially transparent layer of indium/tin oxide is a pane of material selected from the group consisting of glass and plastic.
Claim 15
Dependent Claim
16 words
The device of claim 4, wherein the electronic conductor is an essentially transparent layer of gold.
Claim 16
Dependent Claim
16 words
The device of claim 5, wherein the electronic conductor is an essentially transparent layer of gold.
Claim 17
Dependent Claim
16 words
The device of claim 6, wherein the electronic conductor is an essentially transparent layer of gold.
Claim 18
Dependent Claim
56 words
The device of claim 1, wherein the formula is --O--(CFR' f ) b --(CFR f ) a --SO 3 -Li + , where a=0-3, b=0-3, a+b=at least 1, and R f and R' f are independently selected from the group consisting of a halogen and a substantially fluorinated alkyl group having one or more carbon atoms.
Claim 19
Dependent Claim
44 words
The device of claim 17, wherein the electronic conductor comprises a layer of a member of the group consisting of gold and indium/tin oxide, wherein the electrochromic material comprises a layer of tungsten oxide, and wherein the counter electrode comprises a layer of gold.
Claim 20
Dependent Claim
25 words
The device of claim 18, wherein the ion conducting layer consists essentially of a copolymer of FFC═CFF and FRC═CFF, where R is --O--CFF--CFF--SOOO-Li + .
Claim 21
Dependent Claim
19 words
The device of claim 19, wherein the equivalent weight of the copolymer is between about 700 and about 1000.
Claim 22
Dependent Claim
31 words
The device of claim 20, wherein the electronic conductor is an essentially transparent layer of indium/tin oxide on a pane of material selected from the group consisting of glass and plastic.
Claim 23
Dependent Claim
16 words
The device of claim 21, wherein the electronic conductor is an essentially transparent layer of gold.
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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 |