US4240714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extended life electrochromic display cell
Assignee: International Business Machines Corp
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Filing: 1979-01-29
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Granted: 1980-12-23
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Expires: 1999-01-29
Abstract
Abstract The life of an electrochromic display cell is extended by providing it with a reservoir containing an electrochromic solution. The electrochromic display cell comprises a front electrode which is transparent, a back electrode in spaced relation to said front electrode, a display chamber containing an electrochromic solution positioned between said front and back electrodes and a reservoir containing said solution associated with said display chamber and adapted for the flow of said solution between said reservoir and said chamber.
Inventors
- 👤 Clayton V. Wilbur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:39
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/1533
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
An electrochromic display cell comprising: a transparent front electrode; a back electrode in spaced relation to said front electrode; means positioned between said front electrode and said back electrode defining a display chamber containing an electrochromic solution; and means associated with said display chamber providing a reservoir confining said electrochromic solution and means to permit the continuous flow of said solution between said reservoir and said chamber during usage.
Claim 2
Dependent Claim
69 words
An electrochromic display cell comprising: a transparent front electrode; a back electrode in spaced relation to said front electrode; means positioned between said front electrode and said back electrode defining a display chamber containing an electrochromic solution; and means associated with said display chamber providing a reservoir confining said electrochromic solution and means to permit the continuous flow of said solution between said reservoir and said chamber during usage.
Claim 3
Dependent Claim
21 words
A cell as claimed in claim 1 wherein said means to permit the continuous flow comprises openings in the back electrode.
Claim 4
Dependent Claim
31 words
A cell as claimed in claim 2 wherein at least one opening is near the top of the electrode and at least one opening is near the bottom of the electrode.
Claim 5
Dependent Claim
24 words
A cell as claimed in claim 1 including means for augmenting the rate of flow of said solution between said reservoir and said chamber.
Claim 6
Dependent Claim
31 words
A cell as claimed in claim 1 which includes means for applying heat to said reservoir to augment the rate of flow of said solution between said reservoir and said chamber.
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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |