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Class Information
Number: 568/631
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Oxygen containing (e.g., perchlorylbenzene, etc.) > Ethers > Benzene ring containing > Ether oxygen bonded directly to benzene ring > Plural rings containing
Description: Compounds which contain at least two rings.










Sub-classes under this class:

Class Number Class Name Patents
568/647 Halogen containing 161
568/642 Plural benzene rings bonded directly to each other 128
568/640 Plural benzene rings bonded directly to the same carbon 121
568/635 Plural benzene rings bonded directly to the same oxygen 111
568/632 Polycyclo ring system 184
568/644 Polyoxy 174


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
5393459 Optically active compounds, and a liquid-crystalline phase Feb. 28, 1995
5387718 Method of manufacturing alkylphenyl alkyl ethers or alkylphenyl alkyl thioethers Feb. 7, 1995
5382380 P-terphenyl derivatives and liquid crystalline compositions Jan. 17, 1995
5380460 Ferroelectric liquid crystal compounds containing chiral haloalkoxy tail units and compositions containing them Jan. 10, 1995
5366656 Optically active alcohol and derivatives thereof, liquid crystal composition containing same and liquid crystal device Nov. 22, 1994
5366659 Ferroelectric liquid crystals containing pyrimidine and chiral compounds and liquid crystal compositions containing the same Nov. 22, 1994
5364560 Liquid crystal compound and liquid crystal display device Nov. 15, 1994
5362886 Asymmetric synthesis Nov. 8, 1994
5344997 Alkylation of aromatics using a fluorided silica-alumina catalyst Sep. 6, 1994
5340931 Aromatic allene compounds of the formula (CH.sub.2 .dbd.CH--O).sub.n --R--(A.sub.m in which R is an aromatic group and preparation thereof Aug. 23, 1994
5338484 Optically active benzene derivatives, process for producing the same and liquid-crystalline substances containing said derivatives as active ingredient and optical switching elements Aug. 16, 1994
5334754 Process for preparing 2,5-diphenylterephthalic acid by oxidation Aug. 2, 1994
5328643 Optically active compounds, liquid crystal composition containing said compounds, and liquid crystal optical modulator using said composition Jul. 12, 1994
5324449 Substituted phenyl trifluoromethyl ethers Jun. 28, 1994
5302732 Use of ultra-low sodium silica-aluminas in the alkylation of aromatics Apr. 12, 1994
5298188 Fluorinated liquid crystals Mar. 29, 1994
5290477 Optically active compound and liquid crystal composition containing the same Mar. 1, 1994
5288428 Liquid crystal compounds having a terminal alkoxy propenyl group Feb. 22, 1994
5274002 Trisubstituted phenyl analogs having activity for congestive heart failure Dec. 28, 1993
5274168 Optically active benzene derivatives, process for producing the same and liquid-crystalline substances containing said derivatives as active ingredient and optical switching elements Dec. 28, 1993
5264511 Polymers of bis (ethynylstyryl) benzene and related monomers Nov. 23, 1993
5258544 Synthesis of aldehydes useful in the preparations of HMG-CoA reductase inhibitors Nov. 2, 1993
5250222 Optically active compounds used for liquid crystalline mixtures Oct. 5, 1993
5242996 Modified epoxy resins having acetylenically unsaturated functions Sep. 7, 1993
5238603 Optically active liquid crystalline compound and a composition containing same Aug. 24, 1993
5230826 Halobenzene liquid crystals Jul. 27, 1993
5225586 Benzocyclobutene capped fluoroalkyl aromatic based fluoroarylether monomers, oligomers, and reaction products Jul. 6, 1993
5216185 Polymerizable calixarene and oxacalixarene derivatives, polymers thereof and use of such derivatives and polymers for sequestration of metals Jun. 1, 1993
5205946 Process for the production of overbased calixarates Apr. 27, 1993
5204020 Liquid crystal compounds Apr. 20, 1993
5204018 Liquid crystals Apr. 20, 1993
5190692 Four ring esters and ethers Mar. 2, 1993
5188759 Haloacetylene derivatives Feb. 23, 1993
5178794 Alkylene glycol derivative and liquid crystal mixture containing the same Jan. 12, 1993
5177245 Process for preparing cyclohexenylhydroquinone Jan. 5, 1993
5159082 Process for producing aromatic compound Oct. 27, 1992
5132466 Process for preparing 4-(6-methoxy-2'-naphthyl)butane-2-one Jul. 21, 1992
5130435 Preparation of vinyl ethers Jul. 14, 1992
5122297 Tetracyclic benzene derivatives and liquid-crystalline media Jun. 16, 1992
5114601 Overbased calixarates, compositions containing them and use as lubricating oil additives May. 19, 1992
5105020 Cycloalkane derivatives Apr. 14, 1992
5093027 Chiral dopants for liquid crystalline mixtures Mar. 3, 1992
5087726 Carbamate ACAT inhibitors Feb. 11, 1992
5087769 Preparation of 6-substituted-2-vinylnaphthalene Feb. 11, 1992
5081251 Stilbene compounds use in anionic polymerization Jan. 14, 1992
5068458 Chemical process for halogenating 2-methyl-6-methoxynaphthalene Nov. 26, 1991
5053555 Hydroxy-terminated arylene ethers, and method for making Oct. 1, 1991
5047169 Tolane compound Sep. 10, 1991
5047420 1,3-diaryl cyclopentanes and derivatives thereof as PAF antagonists Sep. 10, 1991
5043415 Nitrogen-containing oxacalixarene and calixarene derivatives, polymers including groups related to such derivatives, and use of such compounds Aug. 27, 1991

1 2 3 4 5 6










 
 
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