US4842383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeless plating method for combining the polymerization and the coating of electrochromic polymers
Assignee: Rhode Island Department of Elementary and Secondary Education
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Filing: 1988-06-07
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Granted: 1989-06-27
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Expires: 2008-06-07
Abstract
Abstract A method of forming a thin film of an electrochromic material is disclosed. The method involves coating an acidic solution containing monomeric aniline and effective amounts of an oxidant and a catalyst on the surface on which the electrochromic film is to be formed. The monomeric aniline polymerizes in situ on the surface to from the electrochromic film.
Inventors
- 👤 Sze C. Yang
- 👤 Robert L. Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:02
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1525; G02F1/1516; G02F1/15165
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
49 words
A method for forming a thin film of an electrochromic material on a surface which includes: coating on said surface an acidic solution containing monomeric aniline and effective amounts of an oxidant and a catalyst, the monomeric aniline polymerizing in situ on said surface to form an electrochromic film.
Claim 2
Independent Claim
49 words
A method for forming a thin film of an electrochromic material on a surface which includes: coating on said surface an acidic solution containing monomeric aniline and effective amounts of an oxidant and a catalyst, the monomeric aniline polymerizing in situ on said surface to form an electrochromic film.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein the monomeric aniline is selected from the group consisting of: ##STR4## where R 1 -R 8 =any one of the following: ##STR5## (where m, n, l=0 to 5 and X=any of the above groups)
Claim 4
Independent Claim
36 words
The method of claims 1 or 2 wherein the acidic solution is selected from the group consisting of HCl, H 2 SO 4 , H 3 PO 4 , acetic acid, sodium acetate and potassium phthalates.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the catalyst is selected from the group consisting of ferric, cupric, mercuric and stannic salts.
Claim 6
Dependent Claim
37 words
The method of claim 1 wherein the oxidant is selected from the group consisting of hydrogen peroxide and potassium chromate or any oxidant with standard potential higher than 0.77 volt with respect to a standard hydrogen electrode.
Claim 7
Dependent Claim
33 words
The method of claim 1 which includes: applying the catalyst to the surface in a pattern; coating subsequently the monomeric aniline and the oxidant on said surface to form a patterned electrochromic film.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein the surface is an electrode.
Claim 9
Dependent Claim
25 words
The method of claim 1 wherein the monomeric aniline is present in the acidic solution in an amount of between 1 to 30% by weight.
Claim 10
Dependent Claim
24 words
The method of claim 1 wherein the catalyst is present in the acidic solution in an amount of between 1 to 10% by weight.
Claim 11
Dependent Claim
23 words
The method of claim 1 wherein the oxidant is present in the solution in an amount of between 3 to 30% by weight.
Claim 12
Dependent Claim
102 words
The method of claim 1 which includes: placing a polymer electrolyte in ion transfer relationship with the electrochromic film and wherein the polymer electrolyte is selected from the group consisting of Poly-(vinylsulfonic acid); [--CH 2 CH(SO 3 H)--] n or its salts; Poly-(acrylic acid), [--CH 2 CH(CO 2 H)--] n ; Poly-(styrene sulfonic acid), [--CH 2 CH(C 6 H 4 SO 3 H)--] n ; Poly-(2-acrylamido-2-methyl-1-propane-sulfonic acid), (--CH 2 CH[CONHC(CH 3 ) 2 CH 2 SO 3 H--] n ; Poly-(vinyl alcohol) (--CH 2 CH(OH)--) n ; Poly(ethylene oxide), (--CH 2 CH 20 --) n ; and Polyphosphazenes having the structure ##STR6##
Claim 13
Dependent Claim
24 words
The method of claim 11 wherein the surface is a first electrode and the polymer electrolyte is placed in contact with a second electrode.
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) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |