US3940205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic device having an indium electrode
Assignee: RCA Corp
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Filing: 1974-09-09
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Granted: 1976-02-24
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Expires: 1994-09-09
Abstract
Abstract A layer of electrochromic material is on a substrate. An acid electrolyte is on the layer of electrochromic material. An indium electrode is utilized to produce coloration in the layer of electrochromic material without the need for any external electrical power. If a conductor layer is disposed between the substrate and the layer of electrochromic material, the device operates under a biasing voltage with substantially no polarization.
Inventors
- 👤 Richard Seely Crandall
- 👤 Brian Wilfred Faughnan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:18
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
62 words
An electrochromic device comprising: a substrate, a layer of electrochromic material on said sustrate, an electrolyte on at least a portion of said layer of electrochromic material, and an electrode for contacting said electrolyte, said electrode being of a material capable of dissolving and forming positive ions when in contact with said electrolyte whereby coloration occurs in said layer of electrochromic material.
Claim 2
Dependent Claim
62 words
An electrochromic device comprising: a substrate, a layer of electrochromic material on said sustrate, an electrolyte on at least a portion of said layer of electrochromic material, and an electrode for contacting said electrolyte, said electrode being of a material capable of dissolving and forming positive ions when in contact with said electrolyte whereby coloration occurs in said layer of electrochromic material.
Claim 3
Dependent Claim
43 words
An electrochromic device in accordance with claim 1 in which said electrode is of a material capable of injecting electrons into said layer of electrochromic material when in contact with said layer of electrochromic material when said contact is surrounded by said electrolyte.
Claim 4
Dependent Claim
15 words
An electrochromic device in accordance with claim 2 in which said substrate is substantially transparent.
Claim 5
Dependent Claim
12 words
An electrochromic device in accordance with claim 2 having an acid electrolyte.
Claim 6
Dependent Claim
14 words
An electrochromic device in accordance with claim 4 in which said electrode comprises indium.
Claim 7
Dependent Claim
16 words
An electrochromic device in accordance with claim 5 in which said electrochromic material comprises tungsten oxide.
Claim 8
Dependent Claim
40 words
An electrochromic device in accordance with claim 1 in which a conductor layer is disposed between said substrate and said layer of electrochromic material and in which said electrode is selected from the group consisting of indium, iron and magnesium.
Claim 9
Dependent Claim
20 words
An electrochromic device in accordance with claim 7 which includes means for electrically connecting said electrode to said conductor layer.
Claim 10
Dependent Claim
19 words
An electrochromic device in accordance with claim 7 in which said substrate and said conductor layer are substantially transparent.
Claim 11
Dependent Claim
12 words
An electrochromic device in accordance with claim 9 having an acid electrolyte.
Claim 12
Dependent Claim
14 words
An electrochromic device in accordance with claim 10 in which said electrode comprises indium.
Claim 13
Dependent Claim
18 words
An electrochromic device in accordance with claim 11 in which said conductor layer comprises tin doped indium oxide.
Claim 14
Dependent Claim
16 words
An electrochromic device in accordance with claim 12 in which said electrochromic material comprises tungsten oxide.
Claim 15
Dependent Claim
23 words
An electrochromic device in accordance with claim 11 in which said electrode is in contacting relation with only a portion of said electrolyte.
Claim 16
Dependent Claim
15 words
An electrochromic device in accordance with claim 14 in which said electrolyte is substantially transparent.
Claim 17
Dependent Claim
23 words
An electrochromic device in accordance with claim 1 in which said electrode is selected from the group consisting of indium, iron and magnesium.
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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |