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US5145609A
Expired / Lapsed
US
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Linear polyether-containing electrochemichromic solutions and related devices
Assignee: Magna Donnelly Corp
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Filing: 1990-11-07
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Granted: 1992-09-08
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Expires: 2010-11-07
Abstract
Abstract The specification discloses electrochemichromic solutions and devices based on the use of from about 0.5 percent by volume of at least one linear polyether which is soluble in the electrochemichromic solution to reduce segregation without unduly affecting leakage current.
Inventors
- 👤 Desaraju V. Varaprasad
- 👤 Niall R. Lynam
- 👤 Hamid R. Habibi
- 👤 Padma Desaraju
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:20
CPC Classifications
C; C09; C09K; C09K9/00; C09K9/02; G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1503; G02F2001/1502; G02F1/1514; G02F2001/15145
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
53 words
An electrochemichromic solution comprising: a solvent; a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage; said solvent thickened by addition of an effective amount of at least one linear polyether.
Claim 2
Dependent Claim
53 words
An electrochemichromic solution comprising: a solvent; a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage; said solvent thickened by addition of an effective amount of at least one linear polyether.
Claim 3
Dependent Claim
22 words
The electrochemichromic solution of claim 1 in which said linear polyether has a molecular weight in the range from 100,000 to 4,000,000.
Claim 4
Dependent Claim
23 words
The electrochemichromic solution of claim 1 in which the viscosity of said electrochemichromic solution is not greater than 600 centistokes at 25° C.
Claim 5
Dependent Claim
32 words
The electrochemichromic solution of claim 1 in which said linear polyether comprises polyethylene oxide and said solvent is thickened by addition of 0.5 to 10 percent weight by volume of polyethylene oxide.
Claim 6
Dependent Claim
36 words
The electrochemichromic solution of claim 4 in which said solvent includes as a substantial component at least one material selected from the group consisting of 3-hydroxypropionitrile, 2-acetylbutyrolactone, glutaronitrile, 3,3'-oxydipropionitrile, 3-methylsulfolane, 2-methylglutaronitrile, propylene carbonate and mixtures thereof.
Claim 7
Dependent Claim
23 words
The electrochemichromic solution of claim 5 in which the viscosity of said electrochemichromic solution is not greater than 600 centistokes at 25° C.
Claim 8
Dependent Claim
36 words
The electrochemichromic solution of claim 1 in which said solvent includes as a substantial component at least one material selected from the group consisting of 3-hydroxypropionitrile, 2-acetylbutyrolactone, glutaronitrile, 3,3'-oxydipropionitrile, 3-methylsulfolane, 2-methylglutaronitrile, propylene carbonate and mixtures thereof.
Claim 9
Dependent Claim
23 words
The electrochemichromic solution of claim 7 in which the viscosity of said electrochemichromic solution is not greater than 600 centistokes at 25° C.
Claim 10
Dependent Claim
29 words
The electrochemichromic solution of claim 1 in which said redox chemical pair comprises 0.025 to 0.05 molar of one of methylviologen and ethylviologen and 0.025 to 0.05 molar 5,10-dihydro-5,10-dimethylphenazine.
Claim 11
Dependent Claim
80 words
An electrochemichromic cell comprising: spaced plates, each having an inwardly facing conductive surface; an electrochemichromic solution located in said cell between said inwardly facing conductive surfaces, said solution comprising: a solvent; a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage; said solvent thickened by addition of at least one linear polyether which is soluble in said solvent.
Claim 12
Dependent Claim
80 words
An electrochemichromic cell comprising: spaced plates, each having an inwardly facing conductive surface; an electrochemichromic solution located in said cell between said inwardly facing conductive surfaces, said solution comprising: a solvent; a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage; said solvent thickened by addition of at least one linear polyether which is soluble in said solvent.
Claim 13
Dependent Claim
22 words
An electrochemichromic cell of claim 10 in which said linear polyether has a molecular weight in the range from 100,000 to 4,000,000.
Claim 14
Dependent Claim
23 words
An electrochemichromic cell of claim 10 in which the viscosity of said electrochemichromic solution is not greater than 600 centistokes at 25° C.
Claim 15
Dependent Claim
32 words
An electrochemichromic cell of claim 10 in which said linear polyether comprises polyethylene oxide and said solvent is thickened by addition of 0.5 to 10 percent weight by volume of polyethylene oxide.
Claim 16
Dependent Claim
29 words
An electrochemichromic cell of claim 13 in which said solvent additionally comprises one of the group consisting of propylene carbonate, 3-hydroxypropionitrile, 2-acetylbutyrolactone, glutaronitrile, 3,3'-oxydipropionitrile, 3-methylsulfolane, 2-methylglutaronitrile and mixtures thereof.
Claim 17
Dependent Claim
24 words
An electrochemichromic cell in accordance with claim 14 wherein the viscosity of said electrochemichromic solution is not greater than 600 centistokes at 25° C.
Claim 18
Dependent Claim
29 words
The electrochemichromic solution of claim 10 in which said redox chemical pair comprises 0.025 to 0.05 molar of one of methylviologen and ethylviologen and 0.025 to 0.05 molar 5,10-dihydro-5,10-dimethylphenazine.
Claim 19
Dependent Claim
65 words
An electrochemichromic solution comprising: a solvent; a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage; said solvent comprising at least 0.5 percent weight by volume of at least one linear polyether having a molecular weight in the range from 100,000 to 4,000,000.
Claim 20
Dependent Claim
65 words
An electrochemichromic solution comprising: a solvent; a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage; said solvent comprising at least 0.5 percent weight by volume of at least one linear polyether having a molecular weight in the range from 100,000 to 4,000,000.
Claim 21
Dependent Claim
22 words
The electrochemichromic solution of claim 17 in which the viscosity of said solution is not greater than 600 centistokes at 25° C.
Claim 22
Dependent Claim
28 words
The electrochemichromic solution of claim 18 in which said solvent comprises one of the group consisting of propylene carbonate, 3-hydroxypropionitrile, 2-acetylbutyrolactone, glutaronitrile, 3,3'-oxydipropionitrile, 3-methylsulfolane, 2-methylglutaronitrile and mixtures thereof.
Claim 23
Dependent Claim
29 words
The electrochemichromic solution of claim 19 in which said redox chemical pair comprises 0.025 to 0.05 molar of one of methylviologen and ethylviologen and 0.025 to 0.05 molar 5,10-dihydro-5,10-dimethylphenazine.
Claim 24
Dependent Claim
85 words
An electrochemichromic cell comprising: spaced plates, each having an inwardly facing conductive surface; an electrochemichromic solution located in said cell between said inwardly facing conductive surfaces, said solution comprising: a solvent; a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage; said solvent thickened by addition of at least one linear polyether having a molecular weight in the range from 100,000 to 4,000,000.
Claim 25
Dependent Claim
85 words
An electrochemichromic cell comprising: spaced plates, each having an inwardly facing conductive surface; an electrochemichromic solution located in said cell between said inwardly facing conductive surfaces, said solution comprising: a solvent; a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage; said solvent thickened by addition of at least one linear polyether having a molecular weight in the range from 100,000 to 4,000,000.
Claim 26
Dependent Claim
31 words
The cell of claim 21 in which said linear polyether comprises polyethylene oxide and said solvent is thickened by the addition of 0.5 to 10 percent weight by volume polyethylene oxide.
Claim 27
Dependent Claim
28 words
The cell of claim 22 in which said solvent comprises one of the group consisting essentially of propylene carbonate, glutaronitrile, 3-hydroxypropionitrile, 2-acetylbutyrolactone, 3,3'-oxydipropionitrile, 3-methylsulfolane, 2-methylglutaronitrile and mixtures thereof.
Claim 28
Dependent Claim
21 words
The cell of claim 23 in which the viscosity of said solvent is not greater than 600 centistokes at 25° C.
Claim 29
Dependent Claim
29 words
The electrochemichromic solution of claim 21 in which said redox chemical pair comprises 0.025 to 0.05 molar of one of methylviologen and ethylviologen and 0.025 to 0.05 molar 5,10-dihydro-5,10-dimethylphenazine.
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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) | 1995-09-08 | 1996-03-09 | 1996-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-08 | 2000-03-09 | 2000-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-08 | 2004-03-09 | 2004-09-08 | $7700.00 | Window Closed / Lapsed |