Fluorinated phenanthrenes and their use in liquid-crystal...

Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C252S299010, C252S299620, C570S183000, C570S187000

Reexamination Certificate

active

07399505

ABSTRACT:
Compounds of the formula (I) are describedin whichM1is, for example, —CO—O— or a single bondA1is, for example, 1,4-phenylene,R5has the same possible definitions specified for R1, with the exception of -M1-A1-R5, but independently of the definition of R1G1-G2is CH2CH2, CH═CH, CF2CF2, CF═CF, CF═CH, CH═CFX1, X2, X3, X4, X5are each independently H or FR1, Y1, Y2are each independentlya) Hb) F where Y1, R1, (R1and Y1) or (R1and Y2) may also have the definitions c) and/or d), but only in each case not more than one of (R1and Y1) and of (R1and Y2) may have the definition d)c) is, for example, a straight-chain or branched alkyl radical having from 1 to 16 carbon atoms or a straight-chain or branched alkenyl radical having from 2 to 16 carbon atoms,d) -M1-A1-R5with the following provisos:a) at least one of X1, X2, X3, X4, X5, G1-G2is or contains Fb1) when at least one of Y1and X1is F and/or G1-G2contains F, it is possible for R1, X2, X3, X4not to be Fb2) when at least one of R1, X2, X3, X4is F, it is possible for X1and Y1not to be F, and for G1-G2to be CH2CH2or CH═CHc) it is not possible for Y2and X5simultaneously to be F.

REFERENCES:
patent: 5648021 (1997-07-01), Wingen et al.
patent: 5888422 (1999-03-01), Manero et al.
patent: 6168838 (2001-01-01), Schmidt et al.
patent: 6558758 (2003-05-01), Yanai et al.
patent: 6793984 (2004-09-01), Bremer et al.
patent: 2003/0227000 (2003-12-01), Bremer et al.
patent: 2004/0106798 (2004-06-01), Bremer et al.
patent: 2004/0124399 (2004-07-01), Schmidt et al.
patent: 100 50 071 (2000-10-01), None
patent: 100 50 071 A 1 (2001-06-01), None
patent: 10225048 (2002-12-01), None
patent: 195 00 768 C 2 (2003-11-01), None
patent: 1 223 210 (2002-01-01), None
patent: 0 837 851 (2002-05-01), None
patent: 1 201 632 (2002-05-01), None
patent: 0 946 473 (2002-07-01), None
patent: 10-236992 (1998-09-01), None
patent: WO 01/10803 (2001-02-01), None
patent: WO 02/055463 (2002-07-01), None
patent: WO 02/079344 (2002-10-01), None
CAPLUS 1969: 481008.
CAPLUS 1975: 530760.
Mallory et al., “Nuclear spin-spin coupling via nonbonded interactions. III. Effects of molecular structure on through-space fluorine-fluorine and hydrogen-fluorine coupling”, Journal of the American Chemical Society (1975), 97(16), 4770-1.
Brown et al., “Aromatic Polyfluoro-Compounds-XXVIII1,2,3,4-Tetrafluorodibenzofuran and Some Nucleophilic Replacement Reactions”, Tetrahedron, vol. 3, pp. 4041—pp. 4045 (1967).
English language abstract of EP 1 223 210, 2002.
Machine English Translation of JP 10-236992 from the Japanese Patent Office, 1998.
Ichinose et al., “High Optical Anisotropy and Small Rotational Viscosity LC Mixture for Field-Sequential Color TN-LCDs”, IDW, LTC4-3, pp. 77-pp. 80 (2000).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Fluorinated phenanthrenes and their use in liquid-crystal... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fluorinated phenanthrenes and their use in liquid-crystal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluorinated phenanthrenes and their use in liquid-crystal... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3965793

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.