US4174152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic devices with polymeric electrolytes
Assignee: Wyeth Holdings LLC
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Filing: 1978-02-13
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Granted: 1979-11-13
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Expires: 1998-02-13
Abstract
Abstract Improved electrochromic devices result from the incorporation of novel polymeric electrolytes. The electrolytes are based upon copolymers prepared from vinyl monomers and acid-group-containing monomers.
Inventors
- 👤 Robert D. Giglia
- 👤 John A. Sedlak
- 👤 David W. Lipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1525
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
An electrochromic device comprising an electrode in contact with a layer of persistent electrochromic material which in turn is in contact with an ion conductive hydrophilic, clear vinyl polymer electrolyte which in turn is in contact with a counterelectrode, and electrical means for selectively applying electrical fields of opposite polarity across said electrodes, wherein the electrolyte comprises a copolymer or partially cross-linked copolymer of 95 to 20% by weight of a vinyl monomer selected from 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxyethyl acrylate, and 2-hydroxypropyl acrylate and 5 to 80% by weight of an acid-group-containing monoethylenically unsaturated monomer.
Claim 2
Dependent Claim
96 words
An electrochromic device comprising an electrode in contact with a layer of persistent electrochromic material which in turn is in contact with an ion conductive hydrophilic, clear vinyl polymer electrolyte which in turn is in contact with a counterelectrode, and electrical means for selectively applying electrical fields of opposite polarity across said electrodes, wherein the electrolyte comprises a copolymer or partially cross-linked copolymer of 95 to 20% by weight of a vinyl monomer selected from 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxyethyl acrylate, and 2-hydroxypropyl acrylate and 5 to 80% by weight of an acid-group-containing monoethylenically unsaturated monomer.
Claim 3
Dependent Claim
25 words
The device of claim 1 wherein the acid-group containing monomer is selected from 2-acrylamido-2-methylpropanesulfonic acid, acrylic acid, methacrylic acid, 2-sulfoethylmethacrylate, alpha-chloroacrylic acid, and 4-vinylsalicyclic acid.
Claim 4
Dependent Claim
17 words
The device of claim 1 wherein the copolymer is a copolymer of 2-hydroxyethyl methacrylate and 2-acrylamido-2-methylpropanesulfonic acid.
Claim 5
Dependent Claim
13 words
The device of claim 1 wherein the copolymer is at least partially crosslinked.
Claim 6
Dependent Claim
12 words
The device of claim 1 wherein the copolymer further contains a humectant.
Claim 7
Dependent Claim
19 words
The device of claim 5 wherein the humectant is selected from glycerol, tetraethylene glycol and hydroxy terminated polyethylene oxide.
Claim 8
Dependent Claim
13 words
The device of claim 1 wherein the electrochromic material is WO 3 .
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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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |