Fluorinated indenes and 1,7-dihydroindacenes of negative...

Details Fluorinated indenes and 1,7-dihydroindacenes of negative... Fluorinated indenes and 1,7-dihydroindacenes of negative...

2007-02-27

2007-02-27

Keys, Rosalynd (Department: 1621)

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

C252S299630, C252S299660, C568S634000, C570S126000, C570S127000, C570S128000, C570S129000, C570S131000, C349S184000

Reexamination Certificate

active

10406569

ABSTRACT:
Fluorinated indenes and 1,7-dihydroindacenes of the general formulae (I) and (II) of negative dielectric anisotropy (Δε<0)in whichT, A, R, L, X, Y, U, W, Z, n, m, p and q are as defined herein are suitable for use in liquid crystal display elements.

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patent: 2004/0171866 (2004-09-01), Reiffenrath et al.
patent: 06-234973 (1994-08-01), None
Barnette, W. E., N-Fluoro-N-alkylsulfonamides: useful reagents for the fluorination of carbanions, Jan. 1984, Journal of the American Chemical Society, vol.106, No. 2, pp. 452-454.
McClinton, Martin A., First trapping of 5,5-difluorocyclopentadiene, Sep. 1992, Journal of the Chemical Society, Perkins Transactions 1: Organic and Bio-organic Chemistry, Issue 17, pp. 249-250.

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