Patents Assigned to Science and Technology Corp.
  • Patent number: 6307156
    Abstract: A coaxial cable includes an inner conductor made of a number of conductive strands which are twined to form a wire rope which is drawn through a die to reduce its diameter until the outer surface of the cable is substantially smooth and the cross section of the cable is substantially circular, an outer conductor concentrically around the inner conductor, and a dielectric between the inner and outer conductors. The strands of the cable may be a single metal or alloy wires, or may be plated wires. The outer conductor may be a highly flexible metallized tape which is helically wrapped around the dielectric. As such, the coaxial cable has substantially greater flexibility. According to a second embodiment, a coaxial cable includes inner and outer conductors, and a dielectric therebetween. The dielectric includes an outer cross-sectional shape which is preferably different from an inner cross-sectional shape of the outer conductor.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: October 23, 2001
    Assignee: General Science and Technology Corp.
    Inventor: Francisco J. Avellanet
  • Patent number: 6278057
    Abstract: Medical devices are provided which utilize a highly flexible cable of two and preferably three or more strands of wire, at least one of which is a nickel-titanium alloy strand. The strands are twined to form a wire rope which is drawn through successive dies to reduce its diameter until the outer surface of the cable is substantially smooth. A cable of all nickel-titanium alloy strands has been found to have an improved elasticity over a superelastic nickel-titanium wire of the same diameter. The cable is used in medical devices in which increased elasticity of a wire-like element is desired. Twisted and drawn cables incorporating a strand of a radiopaque metal or alloy with one or more nickel-titanium strands may be used in devices in which radiopacity of a flexible portion of the device is desired.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: August 21, 2001
    Assignee: General Science and Technology Corp.
    Inventor: Francisco J. Avellanet
  • Patent number: 6274561
    Abstract: Antitumor agent which comprises as the principal agent a mixture of organic compounds having amino group and silyl group (reffered to as silamines) and represented by structural formulae with Adriamycin. Use of silamines in the form of a mixture with Adriamycin, which is an anti-cancer agent showing a potent effect but having extremely serious side effects, makes it possible to highly potentiate the anti-cancer properties of Adriamycin. As a result, the dose of Adriamycincan be reduced and thus its side effects can be relatively relieved as compared with the case where it is used alone. [wherein R1, R2, R3, R4, R5, R6, R7 and R8 represent each hydrogen or C1-10 alkyl, aryl or aralkyl, or the pair of R1 with R2 and that of R5 with R6 may be bonded via alkylene, allylene or aralkylene.
    Type: Grant
    Filed: January 4, 1999
    Date of Patent: August 14, 2001
    Assignee: Japan Science & Technology Corp.
    Inventors: Masao Kato, Kazunori Kataoka, Yukio Nagasaki, Tsutomu Takezawa
  • Patent number: 6265327
    Abstract: Disclosed are a method and apparatus for forming an insulating film on the surface of a semiconductor substrate capable of improving the quality and electrical properties of the insulating film with no employment of high-temperature heating and with good controllability. After the surface of a silicon substrate is cleaned, a silicon dioxide film having a thickness of 1-20 nm is formed on the substrate surface. The silicon substrate is exposed to plasma generated by electron impact, while the silicon substrate is maintained at a temperature of 0° C. to 700° C. Thus, nitrogen atoms are incorporated into the silicon dioxide film, obtaining a modified insulating film having good electrical properties.
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: July 24, 2001
    Assignees: Japan Science and Technology Corp., Matsushita Electronics Corp.
    Inventors: Hikaru Kobayashi, Kenji Yoneda
  • Patent number: 6264664
    Abstract: Surgical basket instruments according to the invention generally include a sheath (catheter), a shaft extending through and axially movable relative to the sheath, a basket assembly coupled to a distal end of the shaft, and a handle coupled to a proximal end of the shaft and adapted for facilitating movement of the shaft relative to the sheath such that the basket assembly may be moved out of and into the distal end of the sheath. The basket assembly is formed from a plurality of circumferentially spaced flexible wires or cables which facilitate entrapping of urological and gastrointestinal calculi. The shaft is made of a hollow compacted cable formed from a flexible yet strong shape memory material such as a nickel-titanium alloy. The hollow (channel) in the shaft receives at least one fiber optic couplable to a laser beam for destroying calculi.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: July 24, 2001
    Assignee: General Science and Technology Corp.
    Inventor: Francisco J. Avellanet
  • Patent number: 6263444
    Abstract: The present invention relates to a network unauthorized access analysis method, a network unauthorized access analysis apparatus utilizing this method and a computer-readable recording medium having a network unauthorized access analysis program recorded thereon, and is capable of processing arbitrary data, performing arbitrary communication between networks, easily dealing with an increase in a number of protocols and coping with arbitrary protocols.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: July 17, 2001
    Assignees: National Aerospace Laboratory of Science & Technology Agency, Japan Science & Technology Corp.
    Inventor: Naoyuki Fujita
  • Patent number: 6248955
    Abstract: An electrically conductive cable includes a number of conductive strands which are twined to form a wire rope. The wire rope is drawn through a die to reduce its diameter until the outer surface of the conductor is smooth and the cross section of the conductor is substantially circular. According to a presently preferred embodiment, the electrically conductive cable is successively drawn through four dies of decreasing diameter so that the overall diameter of the wire rope is reduced by at least approximately 18 percent. The resulting electrically conductive cable has the tensile strength advantage and the low resistance advantage of a solid conductor with the flexibility advantage of a wire rope cable. In addition, the smooth outer surface of the electrically conductive cable according to the invention is easily insulated with an extruded material.
    Type: Grant
    Filed: November 29, 1999
    Date of Patent: June 19, 2001
    Assignee: General Science and Technology Corp
    Inventor: Francisco J. Avellanet
  • Patent number: 6215073
    Abstract: A highly flexible cable includes two, and preferably three or more strands of nickel-titanium alloy wire which are twined (twisted) to form a wire rope. The nickel-titanium alloy wire rope is drawn through successive dies to reduce its diameter until the outer surface of the cable is substantially smooth, the cross section of the cable is substantially circular, and the overall diameter of the wire rope is reduced by 20-50%. The cable is then annealed to remove the effects of cold working. The resulting cable has been found to have an improved flexibility (i.e., a lower modulus of elasticity) relative to single strand nickel-titanium wires of the same diameter.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: April 10, 2001
    Assignee: General Science and Technology Corp
    Inventors: Francisco J. Avellanet, Thomas O. Bales, Jr.
  • Patent number: 6191365
    Abstract: Medical devices are provided which utilize a highly flexible cable of two and preferably three or more strands of wire. The strands are twined to form a wire rope which is drawn through successive dies to reduce its diameter until the outer surface of the cable is substantially smooth. A cable so-formed has improved elasticity. The cable is used in medical devices in which increased elasticity of a wire-like element is desired. Twisted and drawn cables incorporating a strand of a radiopaque metal or alloy may be used in devices in which radiopacity of a flexible portion of the device is desired. Twisted and drawn cables incorporating a strand of a metal or alloy having high electrical conductance may be used in devices in which electrical conductivity of a flexible portion of the device is desired.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: February 20, 2001
    Assignee: General Science and Technology Corp
    Inventor: Francisco J. Avellanet
  • Patent number: 6184381
    Abstract: This document describes a novel and practically excellent process for the preparation of optically active compounds, such as optically active alcohols or amines which are useful for various applications, for example, as synthetic intermediates of pharmaceuticals, liquid crystal materials, and reagents for optical resolution, wherein a hydrogen transfer type asymmetric reduction is carried out in the presence of both a transition metal complex and an optically active nitrogen compound or a transition metal complex having an optically active nitrogen compounds as an asymmetric ligand, and a hydrogen-donating organic or inorganic compound.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: February 6, 2001
    Assignees: Japan Science & Technology Corp., NKK Corp., Takeda Chemical Industries, Asahi Kasei Kogyo Kabushiki Kaisha, Takasago Intl. Corp.
    Inventors: Takao Ikariya, Shohei Hashiguchi, Jun Takehara, Nobuyuki Uematsu, Kazuhiko Matsumura, Ryoji Noyori, Akio Fujii
  • Patent number: 6180760
    Abstract: An actin filament-binding protein 1-Afadin having the amino acid sequence of SEQ ID NO: 1 or having an amino acid sequence substantially the same as that of SEQ ID NO: 1, a cDNA sequence encoding the protein, a genomic DNA sequence to which the cDNA sequence or a partial sequence thereof is hybridized, and an antibody specifically recognizing 1-Afadin are provided. The protein is a novel actin filament-binding protein localized at the cadherin based cell-to-cell adherens junction and the other products are useful as the genetic materials for industrially utilizing the protein.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: January 30, 2001
    Assignees: Japan Science and Technology Corp., Manabu Wada, Hiroshi Obaishi
    Inventors: Yoshimi Takai, Hiroyuki Nakanishi, Kenji Mandai, Manabu Wada, Hiroshi Obaishi
  • Patent number: 6154593
    Abstract: A glass 1 is irradiated with a focused pulsed laser beam 2 having a peak power density of 10.sup.5 W/cm.sup.2 or more and a repetition rate of 10 KHz or more. The glass 1 irradiated with the laser beam 2 changes its refractive index at the focal point 4. During the laser beam irradiation, the glass 1 is continuously moved with respect to the focal point of the pulsed laser beam 2 or continuously scanned with the focused laser beam 2, so as to form the refractive index changed region (i.e. an optical waveguide 5) with a predetermined pattern. The glass 1 in which the optical waveguide 5 will be formed may be any kind of glass having high transparency.
    Type: Grant
    Filed: June 15, 1999
    Date of Patent: November 28, 2000
    Assignees: Japan Science & Technology Corp, Kiyotaka Miura
    Inventors: Kiyotaka Miura, Kenneth M. Davis, Kazuyuki Hirao
  • Patent number: 6137060
    Abstract: A highly flexible radiopaque cable includes two, and preferably three or more strands of nickel-titanium (NiTi) alloy wire which are twined about a higher density core wire preferably made of at least one of silver, gold or platinum-iridium to form a wire rope. The wire rope is drawn through successive dies to reduce its diameter until the outer surface of the cable is substantially smooth, the cross section of the cable is substantially circular, and the overall diameter of the wire rope is reduced by 20-50%. The cable is then annealed to remove the effects of cold working. The resulting cable has been found to have a substantially equal or improved flexibility (i.e., a lower modulus of elasticity) relative to single strand nickel-titanium wires of the same diameter and a higher radiopacity. In an alternative embodiment, no core wire is utilized, and the higher density wire is drawn with two or more strands of NiTi wire. In another embodiment, the higher density wire is radioactive.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: October 24, 2000
    Assignee: General Science and Technology Corp
    Inventor: Francisco J. Avellanet
  • Patent number: 6102774
    Abstract: A garment adapted to support a female chest includes a pair of frontal cup portions of flexible material adapted to cover the chest area of a wearer, each of the cup portions having a perimeter. A multifilament twisted and drawn or swaged cable support element is attached to a portion of the perimeter to provide support for each cup in a manner which is comfortable to the wearer. The multifilament twisted and drawn or swaged cable support element is preferably comprised of a plurality of nickel-titanium wires or a plurality of stainless steel wires, which were formed by first twisting multiple filaments together and then drawing the twisted filaments through multiple dies and/or swaging to form a cable. The multifilament twisted and drawn or swaged cable provides superior support and comfort.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: August 15, 2000
    Assignee: General Science and Technology Corp.
    Inventor: Francisco J. Avellanet
  • Patent number: 6043068
    Abstract: The present invention relates to magnetic carriers in which microorganisms requiring carriers for their growth in the step of treating wastewater have been immobilized, a process for producing the carriers and a method of treating wastewater. The present invention provides microorganisms-immobilized carriers with a high amount of microorganisms immobilized for use in wastewater treatment, the movement of which is controllable in a treatment chamber by magnetic force. Further the present invention provides a process for producing said carriers easily and a method for treating wastewater efficiently.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: March 28, 2000
    Assignee: Japan Science and Technology Corp.
    Inventors: Takaaki Maekawa, Mitsuaki Kuroshima
  • Patent number: 5994647
    Abstract: An electrically conductive cable includes a number of conductive strands which are twined to form a wire rope. The wire rope is drawn through a die to reduce its diameter until the outer surface of the conductor is smooth and the cross section of the conductor is substantially circular. According to a presently preferred embodiment, the electrically conductive cable is successively drawn through four dies of decreasing diameter so that the overall diameter of the wire rope is reduced by 30-40%. The resulting electrically conductive cable has the tensile strength advantage and the low resistance advantage of a solid conductor with the flexibility advantage of a wire rope cable. In addition, the smooth outer surface of the electrically conductive cable according to the invention is easily insulated with an extruded material.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: November 30, 1999
    Assignee: General Science and Technology Corp.
    Inventor: Francisco J. Avellanet
  • Patent number: 5978538
    Abstract: A glass is irradiated with a focused pulsed laser beam having a peak power density of 10.sup.5 W/cm.sup.2 or more and a repetition rate of 10 KHz or more. The glass irradiated with the laser beam changes its refractive index at the focal point. During the laser beam irradiation, the glass is continuously moved with respect to the focal point of the pulsed laser beam or continuously scanned with the focused laser beam, so as to form the refractive index changed region (i.e. an optical waveguide) with a predetermined pattern. The glass in which the optical waveguide is formed may be any kind of glass having high transparency.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: November 2, 1999
    Assignees: Japan Science & Technology Corp., Kiyotaka Miura
    Inventors: Kiyotaka Miura, Kenneth M. Davis, Kazuyuki Hirao
  • Patent number: 5961745
    Abstract: The present invention is directed to provide a Fe based glassy alloy which exhibits soft magnetic characteristics at room temperature, has a thickness greater than that of a conventional amorphous alloy prepared by a liquid quenching process and can be easily formed in bulk. The Fe based glassy alloy in accordance with the present invention has a temperature distance .DELTA.T.sub.x, expressed by the equation .DELTA.T.sub.x =T.sub.x -T.sub.g, of a supercooled liquid of not less than 35.degree. C., wherein Tx indicates crystallization temperature and Tg represents glass transition temperature.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: October 5, 1999
    Assignees: Alps Electric Co., Ltd., Akihisa Inoue, Japan Science and Technology Corp.
    Inventors: Akihisa Inoue, Takao Mizushima, Kouichi Fujita, Oki Yamaguchi, Akihiro Makino
  • Patent number: 5898176
    Abstract: A high space resolving power of the scanning type probe microscope combined with an element analysis and the chemical bond condition analyzing ability of an Auger electronic spectroscopic method, and the energy analyzing results of the Auger electron generated by the high energy electron projection are considered, whereby it is possible to determine the three dimensional coordinate of the atomic nucleus of one atom of the surface, analyze the element thereof and analyze the chemical bond condition.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: April 27, 1999
    Assignee: Japan Science and Technology Corp.
    Inventors: Yuzo Mori, Masao Sakamoto