Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified...
Reexamination Certificate
2005-01-04
2005-01-04
Wu, Shean C (Department: 1756)
Stock material or miscellaneous articles
Liquid crystal optical display having layer of specified...
C252S299010, C252S299610, C252S299620, C252S299630, C252S299660, C252S299670, C544S329000, C544S333000, C546S268400, C546S283100, C549S313000, C549S318000, C549S319000
Reexamination Certificate
active
06838128
ABSTRACT:
The invention relates to chiral nonracemic liquid crystal compounds which are useful as components in liquid crystal compositions to impart high polarization to the mixture. The materials of this invention can be combined with liquid crystal host materials to impart improved properties to mixtures. Chiral nonracemic compounds of this invention can function as additives or dopants in host materials to impart chirality into an LC material. Most generally the invention provides mixtures containing one or more chiral nonracemic dopants which have a chiral nonracemic tail that is an optionally substituted α-ester γ-lactone of the formula:where * indicates a chiral carbon; R1is a straight-chain or branched alkyl or alkenyl group wherein one or more non-neighboring carbon atoms can be replaced with an oxygen atom and wherein one or more carbons can be substituted with one or more halogens; R2and R3, independently of one another, can be hydrogen, a halogen or a lower alkyl or alkenyl group; and X is hydrogen or a lower alkyl group. LC compounds having a chiral nonracemic tail of this general formula have large dipoles (and large spontaneous polarization (Ps)) and when doped into hosts such as achiral smectic C FLC hosts, lead to improved switching speeds of the FLC materials.
REFERENCES:
patent: 4212762 (1980-07-01), Dubois et al.
patent: 4367924 (1983-01-01), Clark et al.
patent: 4490278 (1984-12-01), Shubert et al.
patent: 4874544 (1989-10-01), Yong et al.
patent: 4886619 (1989-12-01), Janulis
patent: 4886622 (1989-12-01), Miyazawa et al.
patent: 4943384 (1990-07-01), Sucrow et al.
patent: 4952335 (1990-08-01), Furukawa et al.
patent: 5051506 (1991-09-01), Wand et al.
patent: 5055221 (1991-10-01), Scheuble et al.
patent: 5061814 (1991-10-01), Wand et al.
patent: 5062691 (1991-11-01), Tristani-Kendra et al.
patent: 5064566 (1991-11-01), Hopf et al.
patent: 5071589 (1991-12-01), Dübal et al.
patent: 5082587 (1992-01-01), Janulis
patent: 5082589 (1992-01-01), Buchecker et al.
patent: 5110497 (1992-05-01), Suzuki et al.
patent: 5130048 (1992-07-01), Wand et al.
patent: 5138010 (1992-08-01), Keller et al.
patent: 5167855 (1992-12-01), Wand et al.
patent: 5168381 (1992-12-01), Walba
patent: 5169556 (1992-12-01), Mochizuki et al.
patent: 5178791 (1993-01-01), Wand et al.
patent: 5178793 (1993-01-01), Vohra et al.
patent: 5180520 (1993-01-01), Wand et al.
patent: 5180521 (1993-01-01), Eidenschink et al.
patent: 5190692 (1993-03-01), Coates et al.
patent: 5250219 (1993-10-01), Mori et al.
patent: 5254747 (1993-10-01), Janulis
patent: 5262082 (1993-11-01), Janulis et al.
patent: 5271864 (1993-12-01), Wand et al.
patent: 5275757 (1994-01-01), Mineta et al.
patent: 5278680 (1994-01-01), Karasawa et al.
patent: 5286409 (1994-02-01), Dübal et al.
patent: 5322639 (1994-06-01), Kawabata et al.
patent: 5327273 (1994-07-01), Beresmev et al.
patent: 5338482 (1994-08-01), Sakaguchi et al.
patent: 5340497 (1994-08-01), Wächtler et al.
patent: 5340498 (1994-08-01), Arai et al.
patent: 5346646 (1994-09-01), Kawabata et al.
patent: 5346647 (1994-09-01), Kelly et al.
patent: 5348685 (1994-09-01), Mochizuki et al.
patent: 5352379 (1994-10-01), Nishiyama et al.
patent: 5367391 (1994-11-01), Johno et al.
patent: 5374375 (1994-12-01), Yui et al.
patent: 5377033 (1994-12-01), Radcliffe
patent: 5378394 (1995-01-01), Dübal et al.
patent: 5378396 (1995-01-01), Yui et al.
patent: 5380460 (1995-01-01), Wand et al.
patent: 5389287 (1995-02-01), Nishiyama et al.
patent: 5391319 (1995-02-01), Junge et al.
patent: 5393458 (1995-02-01), Kelly
patent: 5399291 (1995-03-01), Janulis et al.
patent: 5399701 (1995-03-01), Janulis
patent: 5417883 (1995-05-01), Epstein et al.
patent: 5422037 (1995-06-01), Wand et al.
patent: 5427829 (1995-06-01), Mochizuki et al.
patent: 5437812 (1995-08-01), Janulis et al.
patent: 5445763 (1995-08-01), Schlosser et al.
patent: 5453218 (1995-09-01), Wand et al.
patent: 5455697 (1995-10-01), Coles et al.
patent: 5457235 (1995-10-01), Wand et al.
patent: 5474705 (1995-12-01), Janulis et al.
patent: 5482650 (1996-01-01), Janulis et al.
patent: 5498368 (1996-03-01), Coles
patent: 5529718 (1996-06-01), Hornung et al.
patent: 5534190 (1996-07-01), Johno et al.
patent: 5539555 (1996-07-01), Wand et al.
patent: 5543078 (1996-08-01), Walba et al.
patent: 5547604 (1996-08-01), Coles et al.
patent: 5568299 (1996-10-01), Yoshihara et al.
patent: 5583682 (1996-12-01), Kitayama et al.
patent: 5585036 (1996-12-01), Wand et al.
patent: 5595682 (1997-01-01), Goodby et al.
patent: 5596434 (1997-01-01), Walba et al.
patent: 5626792 (1997-05-01), Wand et al.
patent: 5629428 (1997-05-01), Schlosser et al.
patent: 5637256 (1997-06-01), Walba et al.
patent: 5653913 (1997-08-01), Nakamura et al.
patent: 5658491 (1997-08-01), Kistner et al.
patent: 5658493 (1997-08-01), Walba et al.
patent: 5660762 (1997-08-01), Ito et al.
patent: 5695683 (1997-12-01), Takeichi et al.
patent: 5702637 (1997-12-01), Johnson et al.
patent: 5719653 (1998-02-01), Minato et al.
patent: 5723069 (1998-03-01), Mineta et al.
patent: 5728864 (1998-03-01), Motoyama et al.
patent: 5739885 (1998-04-01), Mochizuki et al.
patent: 5744060 (1998-04-01), Tarumi et al.
patent: 5748164 (1998-05-01), Handschy et al.
patent: 5750214 (1998-05-01), Ito et al.
patent: 5753139 (1998-05-01), Wand et al.
patent: 5770108 (1998-06-01), Totani et al.
patent: 5808800 (1998-09-01), Handschy et al.
patent: 5827448 (1998-10-01), Konuma et al.
patent: 5855812 (1999-01-01), Radcliffe et al.
patent: 5855813 (1999-01-01), Coles et al.
patent: 5856815 (1999-01-01), Mochizuki et al.
patent: 5858273 (1999-01-01), Asaoka et al.
patent: 5861108 (1999-01-01), Ishida et al.
patent: 5861109 (1999-01-01), Goodby et al.
patent: 5866036 (1999-02-01), Wand et al.
patent: 5888420 (1999-03-01), Sakai et al.
patent: 5922242 (1999-07-01), Saishu et al.
patent: 5928562 (1999-07-01), Kistner et al.
patent: 5932136 (1999-08-01), Terada et al.
patent: 5936689 (1999-08-01), Saishu et al.
patent: 5938973 (1999-08-01), Motoyama et al.
patent: 5942155 (1999-08-01), Coles et al.
patent: 5943112 (1999-08-01), Mochizuki et al.
patent: 5949391 (1999-09-01), Saishu et al.
patent: 5951914 (1999-09-01), Matsumoto et al.
patent: 5968413 (1999-10-01), Mine et al.
patent: 5972241 (1999-10-01), Johnson et al.
patent: 5972243 (1999-10-01), Mine et al.
patent: 5976409 (1999-11-01), Mineta et al.
patent: 5980780 (1999-11-01), Motoyama et al.
patent: 5985172 (1999-11-01), Motoyama et al.
patent: 6001278 (1999-12-01), Matsumoto et al.
patent: 6002042 (1999-12-01), Mine et al.
patent: 6007737 (1999-12-01), Nishiyama et al.
patent: 6018070 (2000-01-01), Ito et al.
patent: 6019911 (2000-02-01), Hirano et al.
patent: 6045720 (2000-04-01), Shundo et al.
patent: 6051639 (2000-04-01), Mehl et al.
patent: 6057006 (2000-05-01), Kirsch et al.
patent: 6057007 (2000-05-01), Amano et al.
patent: 6084649 (2000-07-01), Amano et al.
patent: 6106908 (2000-08-01), Duffy et al.
patent: 6139771 (2000-10-01), Walba et al.
patent: 6413448 (2002-07-01), Wand et al.
patent: 3906040 (1989-09-01), None
patent: 3928267 (1991-02-01), None
patent: 4315867 (1994-11-01), None
patent: 0 307 880 (1989-03-01), None
patent: 0 331 091 (1989-09-01), None
patent: 0 356 672 (1990-03-01), None
patent: 0 401 522 (1990-12-01), None
patent: 405868 (1991-01-01), None
patent: 255236 (1994-05-01), None
patent: 0 545 409 (1996-03-01), None
patent: 425304 (1996-07-01), None
patent: 579545 (1997-03-01), None
patent: 0 769 543 (1997-04-01), None
patent: 736078 (1998-06-01), None
patent: 1213390 (1989-08-01), None
patent: 63039286 (1989-08-01), None
patent: 01041845 (1989-12-01), None
patent: 01053791 (1989-12-01), None
patent: 01071776 (1989-12-01), None
patent: 1316339 (1989-12-01), None
patent: 1316367 (1989-12-01), None
patent: 1316372 (1989-12-01), None
patent: 4-193873 (1992-07-01), None
patent: 4-208277 (1992-07-01), None
patent: 8-82778 (1996-03-01), None
patent: 8-113784 (1996-05-01), None
patent: 228128 (2000-08-01), None
patent: 8606401 (1986-11-01), None
patent: 8705015 (1987-08-01), None
patent: 8705018 (1987-08-01), Non
Chen Xin Hua
Wand Michael
Displaytech, Inc.
Greenlee Winner and Sullivan P.C.
Wu Shean C
LandOfFree
High polarization dopants for ferroelectric 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 High polarization dopants for ferroelectric liquid crystal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High polarization dopants for ferroelectric liquid crystal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3411047