Patents Examined by Robert L. Stoll
  • Dental bleaching compositions and methods for bleaching teeth surfaces
    Patent number: 5376006
    Abstract: The present invention discloses high viscosity sustained release dental compositions, such as tooth bleaching or fluoride compositions, for treating tooth surfaces. For maximum results, an improved dental tray having reservoirs for holding the dental composition adjacent the desired tooth surfaces is preferably used in combination with the sustained release dental composition. The sustained release dental compositions include a high carboxypolymethylene concentration which results in very high viscosity. The high level of carboxypolymethylene makes dilution of the dental compositions from saliva difficult and time consuming so that the compositions stay within the tray reservoirs, thereby providing sustained release. The concentrated carboxypolymethylene adds a unique tackiness to the dental composition which helps retain and seal the soft tray material against the patient's teeth.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: December 27, 1994
    Assignee: Ultradent Products, Inc.
    Inventor: Dan E. Fischer
  • Ceric oxide sol
    Patent number: 5376304
    Abstract: As an ultraviolet absorbent material, ceric oxide sol which can be widely used in many fields using various solvent materials is obtained.An anionic aqueous sol is obtained by adding phosphoric acid and/or phosphate to cationic ceric oxide sol. It is a sol that can be applied to an emulsion paint. By further adding a cationic surface active agent to this sol, an organo-ceric oxide sol that can be applied to various organic solvents is formed.This sol may widely be used in utilities using various organic solvent materials, such as paint materials.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: December 27, 1994
    Assignee: Taki Chemical Co., Ltd.
    Inventors: Shin Yamamoto, Yoichi Oka, Hiroshi Nishikura
  • Induction of asymmetry in vesicles
    Patent number: 5376452
    Abstract: Methods are described for controlling the transbilayer distribution of ionizable lipids and proteins in vesicles. Control of the ion gradient of the exterior bathing medium in relation to that of the interior entrapped aqueous compartment of the vesicles induces migration of ionizable lipids or proteins to one or the other of the monolayers comprising the bilayer. This can result in an asymmetric distribution of the ionizable lipid or ionizable protein. The basic ionizable lipids, such as stearylamine and sphingosine, are sequestered into the inner monolayer when the liposome interior is acidic relative to the liposome exterior. Conversely, acidic ionizable lipids such as oleic acid and stearic acid are sequestered into the inner monolayer when the liposome interior is basic relative to the liposome exterior bathing solution.
    Type: Grant
    Filed: October 6, 1993
    Date of Patent: December 27, 1994
    Assignee: The Liposome Company, Inc.
    Inventors: Michael J. Hope, Pieter R. Cullis
  • Ferroelectric liquid crystal device
    Patent number: 5374373
    Abstract: A ferroelectric liquid crystal device having a pair of substrates each provided with voltage application means, an orientation control layer formed on at least one of the substrates, and a layer of ferroelectric liquid crystal composition formed between the pair of substrates, the device being characterized in that the ferroelectric liquid crystal composition comprises at least one compound (a) having an optically active group of the formula (I): ##STR1## and at least one compound (b) which is reverse to the compound (a) in the direction of a helical pitch induced in a nematic phase, the liquid crystal composition exhibiting at least a smectic C phase, smectic A phase and nematic phase at least 20 .mu.m in helical pitch.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: December 20, 1994
    Assignees: Sharp Kabushiki Kaisha, Daiso Co., Ltd.
    Inventors: Mitsuhiro Koden, Tomoaki Kuratate, Fumiaki Funada, Kazuhiko Sakaguchi, Yoshikazu Takehira, Yutaka Shiomi, Tohru Kitamura
  • Liquid crystal compound and liquid crystal display device
    Patent number: 5374375
    Abstract: A liquid crystal compound represented by formula (I), ##STR1## wherein A represents --C.sub.3 H.sub.7, --C.sub.4 H.sub.9 or --C.sub.8 H.sub.17 ; when A is --C.sub.3 H.sub.7, m is an integer of 8, 10, 12 or 14; and when A is --C.sub.4 H.sub.9 or --C.sub.8 H.sub.17, m is an integer of 7 to 14,said compound having an antiferroelectric phase.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: December 20, 1994
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Tomoyuki Yui, Masahiro Johno, Toshio Watanabe, Masamichi Mizukami, Yoshihisa Arai
  • Flowable microbicidal agents
    Patent number: 5374378
    Abstract: There are described liquid microbicidal agents containing compounds from the series comprising o-phenylphenol, p-chloro-m-cresol, p-chloro-m-xylenol and pentachlorophenol and not more than 50 percent by weight of an organic solvent or solvent mixture, and their preparation and use.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: December 20, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jens-Peter Lorentzen, Walter Radt, deceased, Horst-Dieter Lehmann
  • Agent inhibiting the corrosive characteristics of nitrogenous fertilizing solutions, process using the said agent and nitrogenous fertilizing solutions containing the said agent
    Patent number: 5372748
    Abstract: Process for inhibiting the corrosive characteristics of a nitrogenous fertilizing solution comprising incorporating in said nitrogenous fertilizing solution at the moment of its constitution, about 50 to about 150 ppm of at least one of the linear esters of acid phosphates having the formulae; ##STR1## wherein R1 and R2 which are identical or different from one another, are selected from the group consisting of the n-heptyl, n-octyl, n-nonyl and n-decyl radicals.
    Type: Grant
    Filed: April 7, 1993
    Date of Patent: December 13, 1994
    Assignee: CFPI
    Inventors: Joseph Schapira, Jean-Claude Cheminaud, Pascal Petitbon, Dominique Imbert
  • Substituted 6-nitroquipazines, methods of preparation, and methods of use
    Patent number: 5372813
    Abstract: Disclosed is a substituted 6-nitroquipazine of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are each selected from the group consisting of H, Fl, CL, Br, I, CF.sub.3, CH.sub.2 CH.sub.2 F, CH.sub.3, CH.sub.2 CH.sub.3, and --CH(CH.sub.3).sub.2, and wherein one of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 is other than H.Also disclosed is a method for measurement of serotonin uptake sites in a sample, in which a radioligand is incubated with a sample and then the radioactivity of the radioligand bound to the sample is determined, utilizing a radio labeled substituted 6-nitroquipazine as the radioligand. Also disclosed is a method of manufacture and method of use.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: December 13, 1994
    Assignee: The Regents, University of California
    Inventors: Chester A. Mathis, Jr., Anat Biegon, Scott E. Taylor, Joel D. Enas
  • Modified block polymers, their preparation and their use
    Patent number: 5372747
    Abstract: According to the invention, oxyalkylates of aliphatic or cyclic, primarily primary diamines or polyamines, or block polymers (having recurring structural units of the abovementioned oxyalkylate type) produced by prior linking of such oxyalkylates with dicarboxylic acids, are converted into novel substances which are suitable for a very wide variety of areas of application in the field of interface-active agents and can be employed, for example, in the preparation of azo pigments to improve the coloristic properties, by esterification of the terminal hydroxyl group in these aminoxyalkylates using fatty acids or aromatic carboxylic acids and/or resin acids, and, if appropriate, subsequent reaction of free hydroxyl groups which are still present with dicarboxylic acids and sulfite to form the corresponding monoester (containing anionic radicals).
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: December 13, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Heinz Uhrig, Joachim Weide
  • Macrocyclic complexes of yttrium, the lanthanides and the actinides having peripheral coupling functionalities
    Patent number: 5373093
    Abstract: Functionalized water soluble macrocyclic complexes of lanthanide, actinide and yttrium ions were obtained by metal templated, Schiff-base, cyclic condensation of: (1) a functionalized 1,2-diaminoethane and a dicarbonyl compound selected from the group consisting of 2,6-dicarbonylpyridine, 2,6-diformylpyridine, 2,5-dicarbonylfuran, 2,5-diformylfuran, 2,5-dicarbonylthiophene and 2,5-diformylthiophene; or (2) 1,2-diaminoethane and a ring-substituted heterocyclic dicarbonyl compound selected from a group consisting of substituted 2,6-dicarbonylpyridine, substituted 2,6-diformylpyridine, substituted 2,5-dicarbonylfuran, substituted 2,5-diformylfuran; substituted 2,5-dicarbonyl thiophene, and substituted 2,5-diformylthiophene. Coordination complexes thus formed are kinetically stable in dilute aqueous solution.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: December 13, 1994
    Inventors: Lidia M. Vallarino, Robert C. Leif
  • Conducting liquid crystals
    Patent number: 5370820
    Abstract: A semi-conducting liquid crystalline material exhibiting anisotropic conduction properties. The material comprises a radical salt of a disc-like mesogen and a dopant which is an oxidizing or a reducing agent. Not more than 0.5 moles of dopant per mole of mesogen are present.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: December 6, 1994
    Assignee: British Technology Group Ltd.
    Inventors: Neville Boden, Richard J. Bushby, Jonathan Clements, Peter F. Knowles, Malini V. Jesudason
  • Pyrimidinecyclohexane derivatives, process for their preparation, and their use in liquid-crystalline mixtures
    Patent number: 5370823
    Abstract: A liquid-crystalline bispyrimidinylcyclohexane of the formula (I) ##STR1## in which: R.sup.1 and R.sup.2 are identical or different and are, for example, straight-chain or branched alkyl,X.sup.1 and X.sup.2 are identical or different and are H, F, Cl or CN,is particularly suitable as a component of liquid-crystal mixtures.In nematic and smectic liquid-crystal mixtures, these compounds result in low melting points and broad phase ranges.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: December 6, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Illian, Wolfgang Hemmerling, Rainer Wingen
  • Radiolabelled peptide compounds
    Patent number: 5371184
    Abstract: A diagnostic composition suitable for administration to a warm-blooded animal comprising hirudin or a molecule capable of interacting with the hirudin receptor labeled with a radionuclide by means of a chelate ligand capable of administration to an animal to produce reliable visual imaging of thrombus.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: December 6, 1994
    Assignee: Mallinckrodt Medical, Inc.
    Inventors: Raghavan Rajagopalan, Leon R. Lyle, Thomas J. Dunn
  • Water soluble corrosion inhibitor effective against corrosion by carbon dioxide
    Patent number: 5368774
    Abstract: The present invention provides compositions and methods which are effective to prevent corrosion of metal surfaces involved in refining solutions having relatively high partial pressures of carbon dioxide. The compositions of the present invention comprise mixtures of a pyridinium quaternary salt and an organic compound, such as thiourea, which contains at least one sulfur atom double bonded to a carbon atom. The compositions are added substantially continuously to the solution to be treated to result in a final concentration of at least about 30 ppm of pyridinium quaternary salt, preferably between about 56-70 ppm, and at least about 5 ppm double bonded sulfur containing compound, preferably between about 10-13 ppm.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: November 29, 1994
    Assignee: Baker Hughes Incorporated
    Inventors: Bradley G. Borgard, Jack B. Harrell, Jr., John Link
  • Corrosion control composition and method for boiler/condensate steam system
    Patent number: 5368775
    Abstract: A corrosion control composition and method for boiler/condensate steam systems is provided. Corrosion is controlled by the addition to the feedwater of a relatively high molecular weight amine. The high molecular weight amine is formulated so that at the conditions of temperature and pressure in the boiler/condensate steam system, partial degradation into more volatile amines occurs. The resulting blend of neutralizing amines provides the superior corrosion control of a blend of neutralizing amines from a single amine feed. The preferred high molecular weight amine is dimethylaminopropylamine which will partially degrade into dimethylamine, trimethylamine, methylamine, and dimethylaminopropanol.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: November 29, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Anthony M. Rossi, Alexander C. Mc Donald
  • Thickening system
    Patent number: 5368843
    Abstract: A liquid system includes a liquid medium and a thickening mixture, the thickening mixture being dispersed in the liquid medium and comprising a synergistic mixture of a gum-type polymer and an acrylic-type polymer. The thickening system is applicable to a wide variety of systems, including detergent and cleaning compositions.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: November 29, 1994
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventor: George K. Rennie
  • Method of operating third-order nonlinear optical element
    Patent number: 5368782
    Abstract: A third-order nonlinear optical element showing wide employable wave-length range of input light, high speed operation and low light intensity of input light is disclosed. The third-order nonlinear optical element of the present invention has at least two substantially optically smooth surfaces and comprise a charge-transfer complex consisting essentially of (i) at least one electron-accepting component selected from the group consisting of cyano compounds, quinones, nitro compounds, acid anhydride, halogenes, and halogenated carbons; and (ii) at least one electron-donating component selected from the group consisting of unsaturated cyclic hydrocarbon compounds, unsaturated heterocyclic compounds, chalcogen-containing compounds, quarternary unsaturated heterocyclic compounds and metals.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: November 29, 1994
    Assignees: Toray Industries, Inc., Nippon Telegraph and Telephone Corporation
    Inventors: Tetsuya Gotoh, Tosiyuki Kondoh, Keiichi Egawa, Ken-ichi Kubodera
  • Aluminum complexes useful for cross-linking coating compositions
    Patent number: H1386
    Abstract: Aluminum complexes useful as cross-linking agents for coating compositions, especially high solids compositions containing an alkyd resin binder, are made by reacting a volatile oxime with a product of reaction of (1) an aluminum alcoholate or phenolate, (2) a carboxylic acid and/or .beta.-diketo compound, and (3) optionally water.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: December 6, 1994
    Assignee: Rhone-Poulenc Chemicals Limited
    Inventors: Carlo A. Testa, David G. Davenport
  • Polyphenylene ether/thermoplastic elastomer block copolymer blends for adhesives and sealants
    Patent number: H1387
    Abstract: The present invention provides a method for making a method for making high service temperature rubber compound, hot melt adhesive or sealant compositions by combining a polyphenylene ether resin with an elastomeric block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene, which comprises (a) making a masterbatch of 2 to 50 phr of a polyphenylene ether having an intrinsic viscosity of 0.3 deciliters per gram or more and 100 phr of said block copolymer by extruding them together with 2 to 30 phr of an endblock compatible resin, and (b) optionally mixing the masterbatch with more of the block copolymer.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: December 6, 1994
    Assignee: Shell Oil Company
    Inventors: David R. Hansen, Glenn R. Himes, Steven S. Chin
  • Polyolefin polymer and method of making same
    Patent number: H1388
    Abstract: A polyolefin composition comprises repeating units of a metathesis polymerizable olefin monomer, a metathesis polymerization procatalyst, a metathesis polymerization procatalyst activator, and at least one member selected from the group consisting of: (i) a Lewis acid catalyst and a Lewis acid cocatalyst, effective to obtain a residual metathesis polymerizable olefin monomer level of from 0 to 0.25 weight percent, based on the weight of the polyolefin; (ii) an anionic polymerization catalyst; (iii) a free radical polymerization initiator; and (iv) a hydrosilation polymerization catalyst. The method for making the composition is also disclosed. The use of metathesis polymerization in conjunction with another type of polymerization can achieve a variety of beneficial effects, including a very low level of residual metathesis polymerizable monomer.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: December 6, 1994
    Assignee: Hercules Incorporated
    Inventor: Albert S. Matlack