Patents by Inventor Michael D. Wand
Michael D. Wand has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20200046836Abstract: Delivery of active ingredients by administration to an individual a vapor, aerosol, or liposomal suspension. Certain terpene solutions are employed for delivery.Type: ApplicationFiled: July 9, 2019Publication date: February 13, 2020Inventor: Michael D. WAND
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Publication number: 20160309774Abstract: Delivery of active ingredients by administration to an individual a vapor, aerosol, or liposomal suspension. Certain terpene solutions are employed for delivery.Type: ApplicationFiled: April 27, 2016Publication date: October 27, 2016Inventor: Michael D. WAND
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Patent number: 7425281Abstract: The present invention provides organogermanium compounds and liquid crystal compositions comprising such a compound.Type: GrantFiled: December 2, 2005Date of Patent: September 16, 2008Assignee: Displaytech, Inc.Inventors: Michael D. Wand, Kundalika M. More, William N. Thurmes
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Patent number: 5866036Abstract: Chiral nonracemic molecules which are useful as high tilt, high polarization and/or high birefringence FLC materials or are useful as components of such FLC materials and which have the following general structure are provided:RO--(Ph.sub.1).sub.m --(A).sub.a --(Ph.sub.2).sub.n --(B).sub.b --(Ph.sub.3).sub.p --Twhere Ph.sub.1, Ph.sub.2 and Ph.sub.Type: GrantFiled: February 2, 1994Date of Patent: February 2, 1999Assignee: Displaytech, Inc.Inventors: Michael D. Wand, Rohini T. Vohra, David M. Walba, Sean D. Monahan
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Patent number: 5753139Abstract: Ferroelectric Liquid Crystals (FLCs) which exhibit a ferroelectric phase and a chiral nematic phase at temperatures above the ferroelectric phase are provided. The natural helix pitch of the FLC in the ferroelectric phase of these materials is sufficiently tighter than the thickness of the FLC layer such that it is not surface-stabilized. The chiral nematic phase has a natural helix pitch sufficiently greater than the cell thickness to facilitate alignment of the FLC in an FLC device to achieve high contrast. The FLCs of this invention are useful in making fast response, high contrast FLC electro-optic devices in which the FLC retains a helical director structure stable to unwinding.Type: GrantFiled: May 26, 1995Date of Patent: May 19, 1998Assignee: Displaytech, Inc.Inventors: Michael D. Wand, Rohini T. Vohra
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Patent number: 5585036Abstract: This invention provides chiral nonracemic compounds of general formula I which are useful as components of FLC compositions in SSFLC and DHFLC devices: ##STR1## wherein Z is a C.dbd.O group or a CH.sub.2 group, R.sub.F is a partially or fully fluorinated alkyl or alkenyl group, R.sub.2 is selected from an alkyl, alkenyl or alkynyl group in which one or more CH.sub.2 groups can optionally be substituted with one or two halogen atoms or in which one or more non-neighboring CH.sub.2 can be replaced with an O, S or an alkyl silyl group, S.sub.1 (R.sub.A)(R.sub.B), in which R.sub.A and R.sub.B, independently of one another, are small alkyl or alkenyl groups having from one to six carbon atoms, * indicates the chiral carbon and where Ar can be a one, two, or three aromatic ring LC core moieties. In particular, the core can have one to three, aromatic rings which are optionally linked by linking groups including O, S, CH.sub.2 S, SCH.sub.2, CH.sub.2 CH.sub.2, CH.sub.2 O, OCH.sub.2, CH.sub.2 CO.sub.2, CH.sub.Type: GrantFiled: June 5, 1995Date of Patent: December 17, 1996Assignee: Displaytech, Inc.Inventors: Michael D. Wand, Kundalika M. More, William N. Thurmes
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Patent number: 5539555Abstract: Fast response, high contrast Ferroelectric Liquid Crystal (FLC) electro-optic devices in which the FLC retains a helical director structure stable to unwinding are provided. In particular, high contrast distorted helix FLC electro-optic devices including half-wave plates in the visible wavelength region are provided. The FLC cells of this invention incorporate chiral FLCs which exhibit a ferroelectric phase and a chiral nematic phase at temperatures above the ferroelectric phase. The natural helix pitch of the FLC in the ferroelectric phase is sufficiently tighter than the thickness of the FLC layer such that it is not surface-stabilized. The chiral nematic phase has a natural helix pitch sufficiently greater than the cell thickness to facilitate alignment of the FLC in the device to achieve high contrast.Type: GrantFiled: February 7, 1992Date of Patent: July 23, 1996Assignees: Displaytech, Inc., Hoechst AktiengesellschaftInventors: Michael D. Wand, Claus Escher, Mark A. Handschy, Rohini T. Vohra
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Patent number: 5457235Abstract: The present invention provides liquid crystals that are diphenyldiacetylenes of the general formulas: ##STR1## where W, X, Y and Z are, independently of one another, a halogen atom, a hydrogen atom or a trihalomethyl group, T.sub.1 and T.sub.2, independently of one another can be an alkyl, alkene, alkoxy, alkenoxy, ether, thioalkyl, thioalkenyl, haloalkyl, haloalkoxy or haloalkylether groups having from three to twenty carbon atoms or a silylalkyl, silylalkenyl, silylalkoxy or silylthioalkyl group having from three to twenty-eight carbon atoms and wherein M.sub.1 and M.sub.2 can both be single bonds or one of M.sub.1 or M.sub.2 can be a trans-1,4-cyclohexylene or a --CH.sub.2 CH.sub.2 -trans-1,4-cyclohexylene.Type: GrantFiled: January 11, 1993Date of Patent: October 10, 1995Assignee: Displaytech, Inc.Inventors: Michael D. Wand, Sean D. Monahan, William N. Thurmes, Kundalika M. More
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Patent number: 5453218Abstract: This invention provides chiral nonracemic compounds of formula ##STR1## wherein * indicates a chiral carbon, R.sub.1 and R.sub.2, independently of one another, can be an alkyl, alkenyl or alkynyl group wherein one or more non-neighboring CH.sub.2 groups can be replaced with an O, S or a silyl group (R.sub.A SiR.sub.B) wherein R.sub.A and R.sub.B, independently of one another, are alkyl or alkenyl having from one to six carbon atoms; R.sub.1 having from about 3 to 20 carbon atoms, and R.sub.2 having from 1 to about 18 carbon atoms; X is O, S, CO, COO, OCO, COS or a single bond where Ar is a liquid crystal core moiety having two or three aromatic rings of the formula--(Cyc).sub.n --(A).sub.a --Ph.sub.1 --(B).sub.b --Ph.sub.2 --(C).sub.c --(Ph.sub.3).sub.m --whereinPh.sub.1, Ph.sub.2 and Ph.sub.Type: GrantFiled: February 8, 1994Date of Patent: September 26, 1995Assignee: Displaytech, Inc.Inventors: Michael D. Wand, Kundalika M. More, William N. Thurmes
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Patent number: 5380460Abstract: Chiral, nonracemic compounds of the general formula: ##STR1## wherein m and n are either both zero, both equal one or n is equal to one and m is equal to zero, X and Y and Z are halogens, R' is an alkyl, alkoxyl, alkenyl, thioalkyl, thioether, ether, or alkylsilyl group containing three to fifteen carbon atoms, and R is an alkyl group having one to fifteen carbon atoms and where Ar is:--A.sub.a --(E).sub.e --B.sub.b --(F).sub.f --D.sub.d --where A, B and D independently of one another are aromatic rings which are selected from the group consisting of a phenyl, a pyridine ring, a pyrimidine ring, a pyridizine ring, a pyrazine ring and a thiadiazole ring, wherein a, b and d are integers from 0-3 such that a+b+d=2-3, where E and F independently of one another are linking groups selected from the group consisting of a --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --O--, --CH.sub.2 --S--, --O--CH.sub.2 --, --S--CH.sub.Type: GrantFiled: September 20, 1991Date of Patent: January 10, 1995Assignee: Displaytech, Inc.Inventors: Michael D. Wand, William N. Thurmes, David M. Walba
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Patent number: 5271864Abstract: Ferroelectric liquid crystal compounds and compositions containing cyclohexenyl derivatives are provided. Specifically provided are compounds of formula: ##STR1## wherein R.sub.1 and R.sub.2 can be an alkyl, cycloalkyl, alkenyl, alkoxy, thioalkyl, alkylsilyl group having from one to about twenty carbon atoms. Y denotes --COO--, --OOC--, --CH.sub.2 O--, or --OCH.sub.2 --; and Ar.sub.1 and Ar.sub.2, independently of one another, can be selected from the group consisting of phenyl rings, halogenated phenyl rings and nitrogen-containing aromatic groups. In preferred embodiments the compounds of this invention contain at least one nitrogen-containing aromatic ring. Ar.sub.1 and Ar.sub.2 can be selected from 1,4-phenyl, mono- or dihalogenated 1,4-phenyl, 2,5-pyridinyl, 2,5-pyrimidyl, 2,5-pyrazinyl, 2,5-thiadiazole, 3,6-pyridazinyl and 1,4-cyclohexyl either or both be chiral racemic groups or chiral nonracemic groups.Type: GrantFiled: August 7, 1992Date of Patent: December 21, 1993Assignee: Displaytech, Inc.Inventors: Michael D. Wand, Rohini T. Vohra, Kundalika M. More, William N. Thurmes
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Patent number: 5178791Abstract: The present invention provides liquid crystals that are 3,3'-dihalogenated diphenyldiacetylenes of the general formula: ##STR1## where X and Y are, independently of one another, a halogen atom and T.sub.1 and T.sub.2, independently of one another are alkyl or alkenyl or alkoxy tail groups, R.sub.1, R.sub.2, or OR.sub.3, respectively, wherein R.sub.1 and R.sub.3, independently of one another, are straight-chain or branched alkyl groups having three to twenty carbon atoms and R.sub.2 is a mono or diene which may be branched or straight-chain having three to twenty carbon atoms. R.sub.1, R.sub.2, or R.sub.3 may be substituted with one or more halogens, particularly fluorines, except that the C-1 carbon of an OR.sub.3 tail may not be halogenated. One or two non-neighboring CH.sub.2 groups of R.sub.1 or R.sub.3 may be substituted with an O atom, except that the C-1 CH.sub.2 group of an OR.sub.3 tail may not be substituted with an O atom. Liquid crystals in which X=Y=fluorine and T.sub.1 =T.sub.Type: GrantFiled: March 11, 1991Date of Patent: January 12, 1993Assignee: Displaytech, Inc.Inventors: Michael D. Wand, Sean D. Monahan
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Patent number: 5178793Abstract: Chiral, nonracemic compounds of the general formula: ##STR1## in which the chiral tail group containing three asymmetric carbons (as indicated by *) is incorporated into a suitable FLC core moiety R--Ar.sub.2 are provided. The Ar.sub.2 core can include phenylbenzoate, biphenyl, phenylpyridine or phenylpyrimidine. R is an alkyl or alkoxy group having three to fifteen carbon atoms and R' is an alkyl group having from three to twelve carbon atoms. The compounds are useful as ferroelectric liquid crystal components having high polarization density. Compounds in which the chiral epoxide tail is the 1R-methyl-2S,3S-epoxy or 1S-methyl-2R,3R-epoxy enantiomer having higher polarization density.Type: GrantFiled: June 1, 1989Date of Patent: January 12, 1993Assignee: University Research CorporationInventors: Rohini T. Vohra, David M. Walba, Michael D. Wand
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Patent number: 5061814Abstract: Chiral nonracemic molecules which are useful in the preparation of high polarization density FLC compositions and which have the following structure are provided: ##STR1## wherein Ph is a 1,4 substituted phenyl group, m=2 and n=1 or m=1 and n=2, asymmetric carbons are indicated by *. R is an alkyl group having three to fifteen carbon atoms, and R' is an alkyl group having one to seven carbons. The invention in particular provides compounds having the R,R or S,S configuration in the epoxide tail. The epoxy phenylbenzoates of this invention display a property of inducing a tilt angle greater than expected in FLC compositions in which they are combined.Type: GrantFiled: June 1, 1989Date of Patent: October 29, 1991Assignee: Displaytech, Inc.Inventors: Michael D. Wand, Rohini T. Vohra, David M. Walba
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Patent number: 5051506Abstract: Chiral, nonracemic compounds of the general formula: ##STR1## wherein m and n are either both zero, both equal one or n is equal to one and m is equal to zero, X and Y and Z are halogens, R' is an alkyl or alkoxy group having three to fifteen carbons, R is an alkyl group having one to fifteen carbons, and Ar is a 4,4'-substituted phenylvenzoate, 4,4'-substituted biphenylbenzoate, 5,4-substituted 2-phenylpyrimidine or 4,4'-substituted biphenyl core, and wherein * indicates a chiral center, which are useful as ferroelectric liquid crystal components having high polarization are described.Type: GrantFiled: March 4, 1988Date of Patent: September 24, 1991Assignee: Displaytech, Inc.Inventors: Michael D. Wand, David M. Walba