Back to results
US 5,472,643 AGranted
Electrochemichromic sunroof
AssigneeDonnelly Corporation
InventorsDesaraju V. Varaprasad, Niall R. Lynam, Hamid R. Habibi, Padma Desaraju
Life of this patent
Estimating the term…
Abstract
The specification discloses electrochemichromic solutions and devices based on the use of solvents comprising at least about 25% 3-hydroxypropionitrile, 3,3,'-oxydipropionitrile, 2-acetylbutyrolactone, 2-methylglutaronitrile, 3-methylsulfolane and mixtures thereof. The specification also discloses vacuum backfilling techniques for filling electrochemichromic cells and enhanced UV stability through solvent self-screening.
Claims9
An electrochemichromic sunroof for a vehicle comprising:
- spaced plates, each having an inwardly facing conductive surface;
- an electrochemichromic solution in said cell, between said spaced plates, said solution comprising:
- solvent;
- a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage;
- said solvent including at least 25 % by volume of a solvent selected from the group consisting of:
- 3-hydroxypropionitrile (HPN), 3,3'-oxydipropionitrile (ODPN),
- 2-acetylbutyrolactone (ABL), 2-methylglutaronitrile (MGNT), and mixtures thereof.
4 more elements
Dependencies are inferred from the claim text.