Patents by Inventor Takeshi Sano
Takeshi Sano 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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Patent number: 5716722Abstract: In an organic electroluminescent device according to the present invention, at least a carrier transporting layer and a luminescent layer which use an organic material are provided between a hole injection electrode and an electron injection electrode, and at least one of a compound having a pyrimidine ring as its center skeleton and a compound having a triazine ring as its center skeleton is used for a hole transporting material in a hole transporting layer in the carrier transporting layer and the organic material in the luminescent layer.Type: GrantFiled: January 19, 1996Date of Patent: February 10, 1998Assignee: Sanyo Electric Co., Ltd.Inventors: Yuji Hamada, Takeshi Sano, Takanori Fujii, Kenichi Shibata
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Patent number: 5693428Abstract: In an organic electroluminescent device according to the present invention, at least a carrier transporting layer and a luminescent layer which use an organic material are provided between a hole injection electrode and an electron injection electrode, wherein a luminescent portion having a luminescent peak wavelength different from a luminescent peak wavelength in the luminescent layer is partially provided in such a manner that it is laminated on the luminescent layer, or at least a hole transporting layer having luminous characteristics and an electron transporting layer having luminous characteristics which respectively contain organic materials emitting fluorescence in different colors in a visible region are provided between the hole injection electrode and the electron injection electrode, wherein a hole transporting portion having non-luminous characteristics is partially provided between the hole transporting layer having luminous characteristics and the electron transporting layer having luminous chType: GrantFiled: February 2, 1996Date of Patent: December 2, 1997Assignee: Sanyo Electric Co., Ltd.Inventors: Takanori Fujii, Takeshi Sano, Yuji Hamada, Kousuke Takeuchi, Kenichi Shibata
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Patent number: 5681745Abstract: The present invention relates to genetic containment systems which express a biotin-binding component that can be used for selectively destroying recombinant cells such as genetically engineered microorganisms. These systems may comprise a streptavidin or an avidin gene whose expression is controlled by a regulatable promoter. The regulatory agent such as a transcriptional effector is expressed from another gene which may also be expressed and its expression controlled by the containment system. Expression of the agent can be designed to respond to physiological changes in the environment. The invention also relates to containment systems and methods for the selective detection or tracking of recombinant cells and to eukaryotic and prokaryotic cells which contain these genetic containment systems.Type: GrantFiled: May 1, 1995Date of Patent: October 28, 1997Assignees: Trustees of Boston University, The United States of America, as represented by the Secretary of the ArmyInventors: Przemyslaw Szafranski, Charlene M. Mello, Takeshi Sano, Kenneth A. Marx, Charles R. Cantor, David L. Kaplan, Cassandra L. Smith
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Patent number: 5679533Abstract: The present invention relates to genetic containment systems which express a biotin-binding component that can be used for selectively destroying recombinant cells such as genetically engineered microorganisms. These systems may comprise a streptavidin or an avidin gene whose expression is controlled by a regulatable promoter. The regulatory agent such as a transcriptional effector is expressed from another gene which may also be expressed and its expression controlled by the containment system. Expression of the agent can be designed to respond to physiological changes in the environment. The invention also relates to containment systems and methods for the selective detection or tracking of recombinant cells and to eukaryotic and prokaryotic cells which contain these genetic containment systems.Type: GrantFiled: June 7, 1995Date of Patent: October 21, 1997Assignees: Trustees of Boston University, The United States of America as Represented by the Secretary of the ArmyInventors: Przemyslaw Szafranski, Charlene M. Mello, Takeshi Sano, Kenneth A. Marx, Charles R. Cantor, David L. Kaplan, Cassandra L. Smith
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Patent number: 5674597Abstract: Organic electroluminescent elements capable of operating at a low driving voltage, leading to saving of electric power and operating cost for a driving circuit. In an organic electroluminescent element in which a hole transport layer and a luminous layer are formed between a hole injecting electrode layer and an electron injecting electrode layer which are oppositely arranged in a pair and in which the hole transport layer is overlaid on the hole injecting electrode layer, the hole transport layer is doped with a hole injection material at least at a region near the interface between the hole transport layer and a hole injecting electrode. The hole injection material has an ionization potential which is lower than that of the material of the hole transport layer and higher than that of the material of the hole injecting electrode layer.Type: GrantFiled: January 13, 1995Date of Patent: October 7, 1997Assignee: Sanyo Electric Co., Ltd.Inventors: Takanori Fujii, Takeshi Sano, Masayuki Fujita, Yuji Hamada, Kosuke Takeuchi, Kenichi Shibata
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Patent number: 5665539Abstract: A novel system and method for sensitive antigen detection. The system utilizes immuno-polymerase chain reaction in which a specific biotinylated nucleic acid molecule is used as the marker. The biotinylated marker is attached to antigen-antibody complex through a streptavidin-protein A chimeric protein that possesses tight and specific binding affinity both for biotin and immunoglobulin G. A segment of the attached biotinylated marker is amplified by polymerase chain reactions with appropriate primers and the polymerase chain reaction products are detected by agarose gel electrophoresis. The method can detect any antigen and has a greater sensitivity than any existing antigen detection system.Type: GrantFiled: October 4, 1993Date of Patent: September 9, 1997Assignee: The Regents of the University of CaliforniaInventors: Takeshi Sano, Charles R. Cantor, Cassandra L. Smith
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Patent number: 5609888Abstract: An apparatus for producing multifilaments having high fiber strength is disclosed. A spinneret melt spins a polyolefin at a first temperature into filaments. A cooling duct cools the filaments via convection at a second temperature. A chill roll, disposed downstream from the cooling duct, has a third temperature, and forcibly conductively cools the filaments. Finally, heated drawing rolls, disposed downstream from said chill roll, continuously draw the filaments at a high draw ratio.Type: GrantFiled: May 18, 1995Date of Patent: March 11, 1997Assignee: Showa Denko Kabushiki KaishaInventors: Hitoshi Uda, Tetsuya Takahashi, Ryosuke Kamei, Takeshi Sano
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Patent number: 5601903Abstract: An organic EL element that exhibits excellent durability by reducing the amount of accumulated carriers and curbing degradation by heat generated while the organic EL element is driven.Type: GrantFiled: August 25, 1994Date of Patent: February 11, 1997Assignee: Sanyo Electric Co., Ltd.Inventors: Takanori Fujii, Takeshi Sano, Masayuki Fujita, Yuji Hamada, Kenichi Shibata
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Patent number: 5561043Abstract: The invention is directed to constructs and compositions containing multimeric forms of nucleic acid. Multimeric nucleic acids comprise single-stranded nucleic acids attached via biotin to streptavidin and bound with a functional group. These constructs can be utilized in vivo to treat or identify diseased tissue or cells. Repeated administrations of multimeric nucleic acid compositions produce a rapid and specific amplification of nucleic acid constructs and their attached functional groups. For treatment purposes, functional groups may be toxins, radioisotopes, genes or enzymes. Diagnostically, labeled multimeric constructs may be used to identify specific targets in vivo or in vitro. Multimeric nucleic acids may also be used in nanotechnology and to create self-assembling polymeric aggregates such as membranes of defined porosity, microcircuits and many other products.Type: GrantFiled: January 31, 1994Date of Patent: October 1, 1996Assignee: Trustees of Boston UniversityInventors: Charles R. Cantor, Christof M. Niemeyer, Cassandra L. Smith, Takeshi Sano, Donald J. Hnatowich, Mary Rusckowski
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Patent number: 5529853Abstract: The present invention provides an organic EL element improved in durability. The organic EL element comprises a hole-injecting electrode and an electron-injecting electrode, and at least a film made of a luminous material therebetween, wherein the luminous material is one of a metal complex polymer, an inner complex salt having two or more ligands, and 10-hydroxybenzo [h] quinoline-metal complex.Type: GrantFiled: March 1, 1994Date of Patent: June 25, 1996Assignee: Sanyo Electric Co., Ltd.Inventors: Yuji Hamada, Takeshi Sano, Masayuki Fujita, Takanori Fujii, Yoshitaka Nishio, Kenichi Shibata
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Patent number: 5456988Abstract: An electroluminescent device having a hole injection electrode, an electron injection electrode, and at least an organic emitting layer therebetween, said organic emitting layer includes an 8-quinolinol derivative-metal complex whose ligand is selected from the group consisting of chemical formulas 102 through 106:chemical formula 102 ##STR1## chemical formula 103 ##STR2## chemical formula 104 ##STR3## chemical formula 105 ##STR4## chemical formula 106 ##STR5##Type: GrantFiled: February 1, 1993Date of Patent: October 10, 1995Assignee: Sanyo Electric Co., Ltd.Inventors: Takeshi Sano, Masayuki Fujita, Takanori Fujii, Yoshitaka Nishio, Yuji Hamada, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5457357Abstract: An electroluminescent (EL) device is disclosed which has a pair of electrodes, an organic film therebetween including at least organic emitting material, and a vacuum evaporated metal film extending from the electrodes on to the outer surface of the organic film. The metal film protects at least an area on the outer surface of the organic film against air. The area is part of the border between the exposed area of the organic film and one of the electrodes, the part of the border corresponding to the crossing region of the electrodes and its vicinity.Type: GrantFiled: May 4, 1993Date of Patent: October 10, 1995Assignee: Sanyo Electric Co., Ltd.Inventors: Takanori Fujii, Takeshi Sano, Masayuki Fujita, Yoshitaka Nishio, Yuji Hamada, Kenichi Shibata
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Patent number: 5449564Abstract: There is disclosed an EL element having at least one layer made from an organic material between an electron injection electrode and a hole injection electrode. The organic material consists of an oxadiazole series compound which has a plurality of oxadiazole rings, each of the oxadiazole rings being substituted by a condensed polycyclic aromatic group.Type: GrantFiled: October 29, 1993Date of Patent: September 12, 1995Assignee: Sanyo Electric Co., Ltd.Inventors: Yoshitaka Nishio, Takeshi Sano, Masayuki Fujita, Takanori Fujii, Yuji Hamada, Kenichi Shibata
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Patent number: 5432014Abstract: There is disclosed an electroluminescent (EL) element having an electron injection electrode, a hole injection electrode, and at least one layer therebetween, the layer comprising either a Rhodamine metal complex, a chromone metal complex, an azomethine metal complex, or another metal complex whose ligand is either thiobromine, flaviosin, or acriflavine.Type: GrantFiled: November 25, 1992Date of Patent: July 11, 1995Assignee: Sanyo Electric Co., Ltd.Inventors: Takeshi Sano, Masayuki Fujita, Takanori Fujii, Yoshitaka Nishio, Yuji Hamada, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5328985Abstract: A novel recombinant streptavidin-protein A chimeric protein which allows conjugation of antibody molecules with biological materials. The chimeric protein is efficiently expressed in Escherichia coli and is purified by simple procedures. The purified chimetic protein can bind one biotin molecule and one to two immunoglobulin molecules per subunit.Type: GrantFiled: July 12, 1991Date of Patent: July 12, 1994Assignee: The Regents of the University of CaliforniaInventors: Takeshi Sano, Charles R. Cantor
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Patent number: 5304897Abstract: A cold-cathode discharge tube having an anode and a cathode is provided with a proximity conductor which is divided into a first and second proximity conductor members arranged on the outer bottom surface of the discharge tube below the cathode and below the anode respectively. A high voltage is applied to the first conductor member below the cathode, and the second conductor member below the anode is grounded.Type: GrantFiled: October 28, 1992Date of Patent: April 19, 1994Assignee: Sanyo Electric Co., Ltd.Inventors: Takeshi Sano, Masaharu Shinohara
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Patent number: 5283025Abstract: A process for producing multifilaments which has the steps of: melt spinning a polyolefin at a first temperature; cooling the spun filaments with a first chill means which is of a non-contact type and is held at a second temperature; cooling the filaments at a third temperature with a second chill means which is of a contact type for forcibly cooling the filaments; and drawing continuously the filaments at high draw ratio in-line with heating rolls having a predetermined surface temperature so that the filaments cooled at the third temperature are directly and continuously treated by the heating rolls.Type: GrantFiled: January 4, 1993Date of Patent: February 1, 1994Assignee: Showa Denko Kabushiki KaishaInventors: Hitoshi Uda, Tetsuya Takahashi, Ryosuke Kamei, Takeshi Sano
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Patent number: 5207793Abstract: A hammering game apparatus has a pair of mechanically articulated hammer devices coupled with a base mounting a motor-driven revolving platform. The platform has a plurality of pegs protruding through it. One or more players attempt to hammer down the pegs into the base with the hammer device(s). The pegs are driven from a raised position to a lower position on the platform with two longer pegs engaging a stop beneath the platform when driven sufficiently down into the platform. The platform is spring-supported and is pressed down towards the base to raise the pegs back to the raised position.Type: GrantFiled: February 7, 1992Date of Patent: May 4, 1993Assignee: Tyco Investment Corp.Inventors: Derek A. Brand, Derek R. Brand, Kenneth J. Brand, Takeshi Sano
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Patent number: 5012622Abstract: A concrete filled steel tube column. The concrete filled steel tube column includes a steel tube having an inner face; a concrete core disposed within the steel tube; and a separating layer interposed between the inner face of the steel tube and the concrete core for separating the concrete core from the inner face of the steel tube so that the steel tube may not be bonded to the concrete core. After the separating layer is formed on the inner face of the steel tube, the concrete is charged into the steel tube to form a concrete core.Type: GrantFiled: March 30, 1990Date of Patent: May 7, 1991Assignee: Shimizu Construction Co., Ltd.Inventors: Takanori Sato, Yasushi Watanabe, Seiho Kitagawa, Hideyo Shiokawa, Tomoo Shokawa, Yutaka Saito, Osamu Hosokawa, Takeshi Sano, Kazunori Koshida, Yasukazu Nakamura, Hideo Nakashima, Kenichi Ikeda, Yoshihiro Orito
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Patent number: 4504432Abstract: A monofilament of a thermoplastic resin having a high tenacity is produced by a process in which a monofilament is melt spun at a temperature of 220.degree. C. to 310.degree. C. from a thermoplastic resin through a nozzle having a cross-sectional area S (mm.sup.2) satisfying the following equations: ##EQU1## wherein I is a maximum cross-sectional secondary moment max (Ix, Iy) (i.e., the maximum secondary moment in the cross-sectional secondary moments with respect to the main x axis and y axis passing through the center of the gravity of the cross-section); and, then, is subjected to a multi-stage stretching under the conditions satisfying the following equations: ##EQU2## wherein i is a number of stretching stages, e is a base of natural logarithm (i.e., 2.71828), V.sub.1 is the first take-off linear velocity (m/min), V.sub.i+1 is the final take-off linear velocity (m/min) at the i-stretching stage, DR.sub.Ti is the total stretching ratio at the i-stretching stage, DR.sub.Tiw is the DR.sub.Type: GrantFiled: January 23, 1984Date of Patent: March 12, 1985Assignee: Showa Denko Kabushiki KaishaInventors: Ryosuke Kamei, Toyoaki Tanaka, Takeshi Sano, Masataka Kotani