US4762401A
Expired / Lapsed
US
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Electrochromatic system with third electrode
Assignee: Schott AG
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Filing: 1986-05-02
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Granted: 1988-08-09
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Expires: 2006-05-02
Abstract
Abstract In an electrochromatic, transparent layer system comprising at least one electrochromatic layer (2), two electrodes (3, 5) separated by a hydrogen ion supplying layer which simultaneously is a hydrogen ion storing layer (4), there is located, seen in the direction of light incidence through the layer system, a further hydrogen ion conducting layer (6) (e.g. of SiO 2 ) behind the electrode (5), behind which a further electrode (7) is arranged. The electrode (7) is capable of oxidizing hydrogen diffusing from within the system into hydrogen ions. For this purpose, a protective voltage is applied between electrode (5) and electrode (7) such that the third electrode (7) forms the positive pole.
Inventors
- 👤 Friedrich Baucke
- 👤 Klaus Mucke
- 👤 Bernd Metz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:48
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/1533; G02F1/155; G02F2001/1552
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
An electrochromatic transparent layer system hermetically sealed against an exchange of matter with the environment, comprising at least one electrochromatic layer, at least a front and a rear electrode separated by an hydrogen ion conductive layer, and at least one hydrogen ion supplying layer which simultaneously is a hydrogen ion storing layer, characterized by the fact that, seen in the direction of light incidence through the layer system, there is (a) an additional hydrogen ion-conducting layer behind the rear electrode and (b) an additional electrode behind the additional hydrogen-ion conducting layer which is capable of oxidizing diffused hydrogen gas into hydrogen ions.
Claim 2
Dependent Claim
102 words
An electrochromatic transparent layer system hermetically sealed against an exchange of matter with the environment, comprising at least one electrochromatic layer, at least a front and a rear electrode separated by an hydrogen ion conductive layer, and at least one hydrogen ion supplying layer which simultaneously is a hydrogen ion storing layer, characterized by the fact that, seen in the direction of light incidence through the layer system, there is (a) an additional hydrogen ion-conducting layer behind the rear electrode and (b) an additional electrode behind the additional hydrogen-ion conducting layer which is capable of oxidizing diffused hydrogen gas into hydrogen ions.
Claim 3
Dependent Claim
26 words
An electrochromatic layer system as in claim 1, wherein the additional hydrogen ion conducting layer is a SiO 2 -layer which has been applied by metallizing.
Claim 4
Dependent Claim
17 words
An electrochromatic layer system as in claim 1, wherein the third electrode is a precious metal electrode.
Claim 5
Dependent Claim
31 words
An electrochromatic layer system as in claim 1, wherein a protective DC-voltage is applied between the rear electrode and the third electrode such that the third electrode forms the positive pole.
Claim 6
Dependent Claim
17 words
An electrochromatic layer system as in claim 4, wherein the protective voltage is at least 30 mV.
Claim 7
Dependent Claim
17 words
An electrochromatic layer system as in claim 4, wherein the protective voltage is at least 90 mV.
References Cited (Backward Citations)
US4465339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |