| US 7,521,562 B2 | ||
| Filters for electronic display devices | ||
| Ikuo Shimizu, Tokyo (Japan); Junzo Yamano, Mie (Japan); Motoharu Kinugasa, Mie (Japan); and Katsumi Ukai, Mei (Japan) | ||
| Assigned to Kyowa Hakko Chemical Co., Ltd., Tokyo (Japan) | ||
| Appl. No. 11/570,355 PCT Filed Jul. 27, 2005, PCT No. PCT/JP2005/013740 § 371(c)(1), (2), (4) Date Dec. 11, 2006, PCT Pub. No. WO2006/011514, PCT Pub. Date Feb. 02, 2006. |
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| Claims priority of application No. 2004-218354 (JP), filed on Jul. 27, 2004. | ||
| Prior Publication US 2007/0260059 A1, Nov. 08, 2007 | ||
| Int. Cl. C07D 401/00 (2006.01) | ||
| U.S. Cl. 546—211 | 4 Claims |
1. A squarylium compound represented by Formula (Ic):
 wherein R1 and R2 independently represent a hydrogen atom, an alkyl group optionally having substituent(s), an aralkyl group optionally having
substituent(s), an aryl group optionally having substituent(s), or a heterocyclic group optionally having substituent(s);
and
Y represents CH2 or NH.
|