Poly-azo compound, and polarization film having said compound

Details Poly-azo compound, and polarization film having said compound Poly-azo compound, and polarization film having said compound

2007-10-02

2007-10-02

Dye, Rena (Department: 1772)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C349S097000, C349S165000, C359S491010, C252S585000, C008S641000, C008S681000, C008S687000, C534S714000, C534S717000, C534S809000, C534S884000

Reexamination Certificate

active

10986218

ABSTRACT:
Poly-azo compound selected from the group consisting compounds of the formula (I) and compounds of the formula (II),(wherein, Me represents copper, nickel, zinc or iron, A represents a naphthyl group having 1 to 3 sulfonic groups and further optionally having an alkyl group or alkoxy group, R1and R2represent each independently a hydrogen atom, alkyl group or alkoxy group, and R3represents an amino group or hydroxyl group.).

REFERENCES:
patent: 6699976 (2004-03-01), Ashida et al.
patent: 6790490 (2004-09-01), Oiso et al.
patent: 7108897 (2006-09-01), Oiso et al.
patent: 0549342 (1993-06-01), None
patent: 5-295281 (1993-11-01), None
patent: 10-259311 (1998-09-01), None

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