US4392720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic display cell
Assignee: ETS SA A SWISS CORP
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Filing: 1980-11-28
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Granted: 1983-07-12
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Expires: 2000-11-28
Abstract
Abstract An electrochromic display cell comprises a frame interposed between an ionic conductor and an annular soldered zone sealing a cover of the cell to a substrate of the cell. The frame is squeezed between the cover and the substrate to tightly separate the ionic conductor and the solder, preventing any reaction therebetween. In a preferred embodiment, the frame is made of a thermofusible material. It partially melts during the sealing of the cell, adhering thus very tightly to the cover and to the substrate.
Inventors
- 👤 Claude Ganguillet
- 👤 Yves Ruedin
- 👤 Michel Sallin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:53
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/161
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
An electrochromic display cell comprising a substantially flat substrate, an electrode disposed on said substrate, an electrochromic material disposed on a portion of said electrode, a cover having a substantially flat peripheral portion, an ionic conductor disposed between said substrate and said cover, annular soldering means for sealing said peripheral portion of said cover to said substrate, and a protective frame disposed in tight contact with said substrate and said cover and disposed tightly separating said soldering means and said ionic conductor in order to prevent chemical reaction therebetween.
Claim 2
Dependent Claim
89 words
An electrochromic display cell comprising a substantially flat substrate, an electrode disposed on said substrate, an electrochromic material disposed on a portion of said electrode, a cover having a substantially flat peripheral portion, an ionic conductor disposed between said substrate and said cover, annular soldering means for sealing said peripheral portion of said cover to said substrate, and a protective frame disposed in tight contact with said substrate and said cover and disposed tightly separating said soldering means and said ionic conductor in order to prevent chemical reaction therebetween.
Claim 3
Dependent Claim
26 words
The cell of claim 1, wherein said frame comprises a thermofusible material partially melted during said sealing for adhering to said cover and to said substrate.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |