Patent US4807977A successfully refreshed from Google Patents.
US4807977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-color electrochromic cells having solid polymer electrolytes and a distinct electrochromic layer
Assignee: Eltron Research Inc
•
Filing: 1986-06-26
•
Granted: 1989-02-28
•
Expires: 2006-06-26
Abstract
Abstract A solid-state multi-color electrochromic display cell having a distinct organic electrochromic chemical layer having one side immediately adjacent a display electrode and the other side adjacent a solid electrolyte.
Inventors
- 👤 Anthony F. Sammells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:10
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1516
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
A solid-state multi-color electrochromic display cell comprising an electrochromic half cell, a counter half cell, and a separator therebetween, said electrochromic half cell comprising a display electrode comprising an electronically conducting film on a substantially transparent plate and a distinct electrochromic layer consisting essentially of an organic electrochromic chemical having one side immediately adjacent said electronically conducting film and further comprising a solid electrolyte layer comprising an ionically conducting polymer and a supporting electrolyte between said electrochromic layer and said separator, said separator comprising an insoluble cation conducting membrane and said counter half cell comprising an ionically conducting polymer layer with supporting electrolyte immediately adjacent said separator, a redox electroactive chemical and a counter electrode.
Claim 2
Dependent Claim
115 words
A solid-state multi-color electrochromic display cell comprising an electrochromic half cell, a counter half cell, and a separator therebetween, said electrochromic half cell comprising a display electrode comprising an electronically conducting film on a substantially transparent plate and a distinct electrochromic layer consisting essentially of an organic electrochromic chemical having one side immediately adjacent said electronically conducting film and further comprising a solid electrolyte layer comprising an ionically conducting polymer and a supporting electrolyte between said electrochromic layer and said separator, said separator comprising an insoluble cation conducting membrane and said counter half cell comprising an ionically conducting polymer layer with supporting electrolyte immediately adjacent said separator, a redox electroactive chemical and a counter electrode.
Claim 3
Dependent Claim
26 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said organic electrochromic chemical is selected from the group consisting of rare earth diphthalocyanines and alkylviologens.
Claim 4
Dependent Claim
25 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said organic electrochromic chemical is selected from the group consisting of lutetium diphthalocyanine and heptylviologen.
Claim 5
Dependent Claim
17 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said organic electrochromic chemical is lutetium diphthalocyanine.
Claim 6
Dependent Claim
22 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said electrochromic layer has a thickness of about 40Å to about 20,000Å.
Claim 7
Dependent Claim
25 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said organic electrochromic chemical is water soluble and said ionically conducting polymer is water insoluble.
Claim 8
Dependent Claim
35 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said organic electrochromic chemical is water insoluble and said ionically conducting polymer is selected form the group consisting of water soluble and water insoluble polymers.
Claim 9
Dependent Claim
50 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said ionically conducting polymer is selected from the group consisting of poly(phosphazenes), poly(ethylene oxide), poly(propylene oxide), perfluorosulfonic acid, poly(styrene sulfonic acid), poly-2-acrylamido-2-methyl propane sulfonic acid, poly(ethylene sulfonic acid), poly(oxyethylene), poly(methacrylate), poly(ethylene succinate), poly(vinyl acetate), polyacrylonitrile, poly(vinyliene fluoride) and poly(tetramethylene oxide).
Claim 10
Dependent Claim
43 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said supporting electrolyte is selected from the group consisting of sodium sulfate, potassium chloride, sodium hexafluorophosphate, lithium methanetrifluorosulfonate and sodium methaneotrifluorosulfonate, said supporting electrolyte present in concentration of about 0.001M to about 0.2M.
Claim 11
Dependent Claim
32 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said redox electroactive chemical is in a discrete layer between said counter electrode and said ionically conducting polymer layer with supporting electrolyte.
Claim 12
Dependent Claim
20 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said redox electroactive chemical is dissolved in said supporting electrolyte.
Claim 13
Dependent Claim
20 words
A solid-state multi-color electrochromic display cell of claim 1 wherein said redox electroactive chemical is dispersed in said supporting electrolyte.
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) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |