Patent US4872745A successfully refreshed from Google Patents.
US4872745A
Expired / Lapsed
US
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Cover for car lamps
Assignee: Toyoda Gosei Co Ltd
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Filing: 1988-02-17
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Granted: 1989-10-10
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Expires: 2008-02-17
Abstract
Abstract A cover for car lamps comprising a transparent base and a transparent element with variable coloring intensity capable of coloring and discoloring by electric conduction, disposed on at least a part of the base.
Inventors
- 👤 Norio Fujisawa
- 👤 Toshishige Sakamoto
- 👤 Toshiyasu Ito
- 👤 Junichi Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:41
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/02; B60Q1/04; F; F21; F21S; F21S41/00; F21S41/60; F21S41/63; F21S41/64; F21S41/645; G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
60 words
A cover for car lamps comprising: a transparent base, and a transparent element with variable coloring intensity, the color being controlled by electric conduction, disposed on at least a part of said base, said transparent element being substantially nontransparent and colored when said lamps are turned off and substantially transparent and colorless or disclosed when said lamps are turned on.
Claim 2
Dependent Claim
60 words
A cover for car lamps comprising: a transparent base, and a transparent element with variable coloring intensity, the color being controlled by electric conduction, disposed on at least a part of said base, said transparent element being substantially nontransparent and colored when said lamps are turned off and substantially transparent and colorless or disclosed when said lamps are turned on.
Claim 3
Dependent Claim
28 words
A cover for car lamps as set forth in claim 1, wherein said transparent element with variable coloring intensity is an electrochromic element or a color liquid crystal.
Claim 4
Dependent Claim
32 words
A cover for car lamps as set forth in claim 2, wherein said electrochromic element is formed by ion plating method and is provided with an adhesion layer and a coating layer.
Claim 5
Dependent Claim
36 words
A cover for car lamps as set forth in claim 2, wherein said electrochromic element comprises a first electrode, an oxidative color-forming layer, an electrolyte, a reductive color forming-layer and a second electrode consecutively piled together.
Claim 6
Dependent Claim
118 words
A cover for car lamps as set forth in claim 4, wherein said oxidative color-forming layer is a material chosen from the following: IrO x , Cr 2 O 3 , Ir(OH) x , Ni(OH) x , NiO, Ni, Rh(OH) x , RhO, and Ru(OH) x , said electrolyte is a material chosen from the following: Ta 2 O 5 , LiF, SiO 2 , ZrO 2 , MgF 2 , CaF 2 , Al 2 O 3 , Y 2 O 3 , Na-β-alumina, and Li 3 N(Li + ), and said reductive color-forming layer is a material chosen from the following: WO 3 , TiO 2 , MoO 3 , and Nb 2 O 5 .
Claim 7
Dependent Claim
22 words
A cover for car lamps according to claim 1, wherein said cover is formed integrally with a grill of a car body.
References Cited (Backward Citations)
GB328017A
Cited
US3774988A
Cited
US4550982A
Cited
JPS5891431A
Cited
JPS6186733A
Cited
US4664934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |