Patent US2184067A successfully refreshed from Google Patents.
US4150879A
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Solid dry electrochromic display
Assignee: Texas Instruments Inc
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Filing: 1976-11-12
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Granted: 1979-04-24
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Expires: 1996-11-12
Abstract
Abstract A totally dry solid electrochromic display cell comprising a tungsten oxide display electrode, a ceramic-like ion conductive electrolyte of a sodium zirconium silicon phosphoric oxide electrolyte and a counter electrode of a sodium "bronze" having a metallic coating.
Inventors
- 👤 Michel L. Bayard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:48
CPC Classifications
C; C09; C09K; C09K9/00; G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
An electrochromic display cell comprising: a transparent front panel member of sufficient thickness to act as the structural support substrate of said cell, a plurality of display electrodes supported on and visible through said front panel and comprised of an oxide of tungsten or vanadium, a counter-electrode comprised of a sodium tungstate or vanadate; a dry solid electrolyte interposed between and contacting said display electrodes and said counter-electrode, said electrolyte being electrically insulating but conductive of sodium ions; and electrical contact means to each of said electrodes.
Claim 2
Dependent Claim
87 words
An electrochromic display cell comprising: a transparent front panel member of sufficient thickness to act as the structural support substrate of said cell, a plurality of display electrodes supported on and visible through said front panel and comprised of an oxide of tungsten or vanadium, a counter-electrode comprised of a sodium tungstate or vanadate; a dry solid electrolyte interposed between and contacting said display electrodes and said counter-electrode, said electrolyte being electrically insulating but conductive of sodium ions; and electrical contact means to each of said electrodes.
Claim 3
Dependent Claim
41 words
An electrochromic display cell as defined in claim 1 wherein said electrolyte is comprised of a material which is a member of the series Na 1+x Zr 2 Si x P 3-x O 12 and x is from 0.8 to 2.4.
Claim 4
Dependent Claim
15 words
An electrochromic display cell as defined in claim 2 wherein x is equal to 2.
Claim 5
Dependent Claim
33 words
An electrochromic display cell as defined in claim 1 wherein said display electrode is comprised of WO 3 and said counter-electrode is comprised of Na y WO 3 and y is about 0.3.
Claim 6
Dependent Claim
41 words
An electrochromic display cell as defined in claim 4 wherein said electrolyte is comprised of a material which is a member of the series Na 1+x Zr 2 Si x P 3-x O 12 and x is from 0.8 to 2.4.
Claim 7
Dependent Claim
44 words
An electrochromic display cell as defined in claim 1 wherein said display electrode is comprised of WO 3 , said counter-electrode is comprised of Na 0 .3 WO 3 and said electrolyte is comprised of Na 3 Zr 2 Si 2 PO 12 .
References Cited (Backward Citations)
US3998525A
Cited
US4009936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |