Patents Examined by Josephine L. Barr
  • Radiation-hardened polymeric films
    Patent number: 4622355
    Abstract: The radiation-induced conductivity of polymeric dielectrics with low electronic mobility is reduced by doping with electron donor or electron acceptor compounds at a level of 10.sup.15 to 10.sup.21 molecules of dopant/cm.sup.3. Polyesters, polyolefins, perfluoropolyolefins, vinyl polymers, vinylidene polymers, polycarbonates, polysulfones and polyimides can benefit from such a treatment. Usable dopants include 2,4,7-trinitro-9-fluorenone, tetracyanethylene, 7,7,8,8-tetracyanoquinodimethane, m-dinitrobenzene, 2-isopropylcarbazole, and triphenylamine.
    Type: Grant
    Filed: July 16, 1984
    Date of Patent: November 11, 1986
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Charles Arnold, Jr., Robert C. Hughes, R. Glen Kepler, Steven R. Kurtz
  • Moldable electrically conductive polymer compositions
    Patent number: 4622266
    Abstract: A salt of 7,7,8,8-tetracyanoquinodimethane (TCNQ) and a structural polymer re dissolved in a mutual solvent. The solution is chilled and subsequently added to a liquid with which the solvent is miscible but in which the TCNQ and polymer are less soluble. A precipitate results which is a massive, conducting, moldable substance stable in atmospheric oxygen.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: November 11, 1986
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Oh-Kil Kim
  • Conducting polymers
    Patent number: 4618454
    Abstract: An electrically conducting composition is described which comprises a polyarylene, e.g. polyphenylene, and a suitable doping agent, e.g. ferric chloride. The polyarylene is prepared from a poly(1,2-disubstitutedcyclohexa-3,5-diene).
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: October 21, 1986
    Assignee: Imperial Chemical Industries PLC
    Inventors: Denis G. H. Ballard, Kenneth T. Moran, Ian M. Shirley
  • High pressure sodium lamp having improved pressure stability
    Patent number: 4617492
    Abstract: High pressure sodium lamps have been subject to progressive reduction in pressure of contained sodium with attendant reduction in lighting quality. It has been discovered that modification of lamp components permits the pressure of contained sodium to be maintained at higher levels. Emission materials enclosed within the lamp are altered to limit reactive oxygen in the lamp atmosphere. A thermionic electrode as equipped with an improved emission composition as illustrated in areas B and C of the triaxial plot of FIG. 3.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: October 14, 1986
    Assignee: General Electric Company
    Inventor: Krishan L. Luthra
  • Electrically conductive polymer blends of an acetylene polymer and a triblock thermoplastic elastomer
    Patent number: 4616067
    Abstract: Electrically conductive polymer blends of an acetylene polymer, such as poly(acetylene), and a triblock thermoplastic elastomer, such as styrene-butadiene-styrene, are disclosed. In addition, a method for preparing such blends wherein the acetylene polymer is preferentially formed in the central elastomeric block of the triblock copolymer is disclosed. These blends exhibit high conductivity and elasticity upon doping with electron donors or electron acceptors.
    Type: Grant
    Filed: December 27, 1984
    Date of Patent: October 7, 1986
    Assignee: GTE Laboratories Incorporated
    Inventors: Kang I. Lee, Harriet Jopson
  • Electroconductive organic polymer and method for producing the same
    Patent number: 4615829
    Abstract: An electroconductive organic polymer exhibiting outstanding electroconductivity is described, containing an electron acceptor as a dopant, and having electroconductivity of not less than 10.sup.-6 S/cm, substantially comprising a linear polymer having as a main repeating unit thereof a quinonediimine structure represented by formula (III) ##STR1## wherein R represents a hydrogen atom or an alkyl group. This polymer can be obtained by oxidative polymerization of an aniline compound or a water-soluble salt thereof with an oxidizing agent in a reaction medium containing a protonic acid.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: October 7, 1986
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Shohei Tamura, Sadamitsu Sasaki, Masao Abe, Hitoshi Nakazawa, Hisashi Ichinose, Keiji Nakamoto, Satoshi Yumoto
  • Method for doping tin oxide
    Patent number: 4613539
    Abstract: The invention is directed primarily to a method of doping tin oxide with Ta.sub.2 O.sub.5 and/or Nb.sub.2 O.sub.5 using pyrochlore-related compounds derived from the system SnO--SnO.sub.2 --Ta.sub.2 O.sub.5 --Nb.sub.2 O.sub.5 for use in thick film resistor compositions. The invention is also directed to thick film resistors containing the above-described pyrochlore-related compounds and to various compositions and methods for making such thick film resistors.
    Type: Grant
    Filed: August 29, 1985
    Date of Patent: September 23, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jacob Hormadaly
  • Gelable blends of organosilicon-containing materials and hydrophobic polyols
    Patent number: 4613451
    Abstract: Disclosed is a liquid composition comprising a mixture of (A) a hydrophobic polyol, and (B) an organosilicon-containing material. The organosilicon-containing material is substantially free of unhydrolyzed aminoalkylsilane and comprises an organosilicon-containing substance free of functional groups attached to carbon and essentially free of alkali metal ions. The organosilicon-containing substance has atoms bonded directly to silicon all of which are selected from O, N, and/or Cl. The silicon-containing substance additionally has moieties directly bonded to Si which are displaceable by reaction with water and/or alcohol. At least a part of the silicon-containing substance is hydrolyzed to a compound or a mixture of compounds which contains a residual amount of the moieties directly bonded to Si which are displaceable by reaction with water and/or alcohol.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: September 23, 1986
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, David T. McKeough
  • Semi-conductive polyolefin compositions and cables covered with same
    Patent number: 4612139
    Abstract: The disclosure of this application is directed to a semi-conductive composition, based on a polyolefin, carbon black and a polyethylene glycol, which is suitable for use as a semi-conductive layer, bonded to an insulation layer of an electrical cable, serving to protect the insulation from tree-like degradation, commonly referred to as water trees.
    Type: Grant
    Filed: May 17, 1984
    Date of Patent: September 16, 1986
    Assignee: Nippon Unicar Co. Limited
    Inventors: Youichi Kawasaki, Kenji Igarashi
  • Conductive resinous composites
    Patent number: 4610808
    Abstract: This invention is directed to resinous compositions which are generally metal-filled and which also contain hard filler materials. This combination produces unexpectedly better electrical conductivity than metal-filled material without the hard filler materials. Meanwhile there can be retained the resinous composition's ability to be quickly fabricated by simple molding technique into structurally sound rigid articles which are electrically conductive.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: September 9, 1986
    Assignee: Mitech Corporation
    Inventor: Lothar W. Kleiner
  • Iodine-containing conductive resin composition
    Patent number: 4610811
    Abstract: An iodine-containing conductive resin composition, said composition obtained by dispersing a carbon in a complex adduct of iodine and a polymer capable of forming a complex adduct with iodine and/or a mixture obtained by dispersing iodine in said polymer.
    Type: Grant
    Filed: March 5, 1985
    Date of Patent: September 9, 1986
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Takakazu Yamamoto, Sadaaki Yamamoto, Sadao Kobayashi, Hiroshi Sukawa
  • Doped lignin polymer
    Patent number: 4610809
    Abstract: A polymer that has been made of lignen and that contains sulphur, and into which a compound that activates the conductivity, such as iodine or ferric chloride, has been doped. The doped lignin polymer has properties of a semiconductor.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: September 9, 1986
    Assignee: Rauma-Repola Oy
    Inventors: Ermo Kaila, Anita Kinanen, Kalle Levon, Johannes Turunen, Jan-Erik sterholm, J. Johan Lindberg
  • Hydrogen-selective sensor and manufacturing method therefor
    Patent number: 4608549
    Abstract: A hydrogen-selective gas sensor comprising a gas-sensing element including a semiconductor in a principal portion thereof, and a thin coat or layer inactive for oxidation of hydrogen formed over an entire surface of the gas-sensing element or at least on a surface of the semiconductor. The thin layer comprises one of silicon oxide, aluminum oxide, and silicon nitride, and is formed on the surface of the semiconductor by chemical deposition, the thin layer checking passage of molecules other than hydrogen molecules.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: August 26, 1986
    Assignee: New Cosmos Electric Co. Ltd.
    Inventor: Kiyoshi Fukui
  • Rubber toughened polyvinyl alcohol film compositions
    Patent number: 4608187
    Abstract: Polymer compositions are provided which may be cast as thin, self-supporting films, useful in forming sealed envelopes or pouches containing granulated pulverulent or non-aqueous liquid materials. The cast films comprise a polymeric matrix, having at least about 50 weight percent polyvinyl alcohol, and a plurality of microdomains dispersed throughout the polymeric matrix. The films have good resistance to breakage at low temperatures and low relative humidities.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: August 26, 1986
    Assignee: The Clorox Company
    Inventor: Daniel M. Chang
  • Radar attenuating paint
    Patent number: 4606848
    Abstract: A radar attenuating composition is described for which incident microwave diation is absorbed and/or scattered, causing a significant decrease in retroreflectance of the object to which the composition is applied, that is, a reduction in the radar cross-section of the object. The radar attenuating composition or paint is prepared by uniformly mixing thin conducting fibers such as stainless steel fibers or carbon or graphite into a standard camouflage-type paint. The fibers act as electric dipole segments. The purpose of the countermeasure paint of the present invention is to reduce the amount of microwave radiation reflected back by a target to the receiver, i.e. reducing the amount of retroreflection.
    Type: Grant
    Filed: August 14, 1984
    Date of Patent: August 19, 1986
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: John W. Bond
  • Non-linear resistor and method of manufacturing the same
    Patent number: 4606116
    Abstract: A non-linear resistor having an operational field strength which optionally is formed as a VDR- or as an NTC-resistor having a ceramic sintered body on the basis of a polycrystalline alkaline earth metal titanate doped with a small quantity of a metal oxide so as to produce an N-type conductivity, in which the sintered body comprises at its grain boundaries insulating layers formed by re-oxidation of the sintered body and consists of an alkaline earth metal titanate having a Perowskite structure of the general formula(A.sub.1-x Ln.sub.x)TiO.sub.3.yTiO.sub.2 or A(Ti.sub.1-x Me.sub.x)O.sub.3.yTio.sub.2,wherein: A=alkaline earth metal; Ln=rare earth metal; Me=metal having a valency of 5 or more; 0.0005<x<solubility limit in the Perowskite phase; y=0.001 to 0.02.
    Type: Grant
    Filed: July 11, 1985
    Date of Patent: August 19, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Detlev Hennings, Axel Schnell, Herbert Schreinemacher
  • Intercalation of small graphite flakes with a metal halide
    Patent number: 4604276
    Abstract: A method and apparatus for intercalating small graphite flakes with a metal halide. Graphite and a metal halide are placed in two chambers 12, 14 of a rotary vapor transport reactor assembly 10 and heated. The reactor is charged with a halogen gas and rotated by motor 24 during synthesis to produce a homogenous and uniform intercalated product.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: August 5, 1986
    Assignee: GTE Laboratories Incorporated
    Inventors: Daniel W. Oblas, Sophia R. Su
  • Electrically conductive ferrofluid compositions and method of preparing and using same
    Patent number: 4604229
    Abstract: An electrically conductive ferrofluid composition and a method of preparing and using the ferrofluid composition in a ferrofluid seal apparatus, and which ferrofluid composition comprises a liquid carrier having a colloidal dispersion of ferromagnetic particles in an amount sufficient to provide magnetic properties to the ferrofluid composition and carbon particles in an amount sufficient to provide electrical conductive properties to the ferrofluid composition, the ferromagnetic and carbon particles stabilized in the ferrofluid composition by a surface active dispersing agent. The electrically conductive ferrofluid composition is usefully employed in a ferrofluid exclusion seal apparatus to provide an electrically conductive seal apparatus particularly useful for computer disk drives and sputtering apparatus in the semiconductive industry.
    Type: Grant
    Filed: March 20, 1985
    Date of Patent: August 5, 1986
    Assignee: Ferrofluidics Corporation
    Inventors: Kuldip Raj, Lucian Borduz, Hanumaiah L. Gowda
  • Silicon fiber and method of making the same
    Patent number: 4604231
    Abstract: A silicon fiber which has a structure expressed by (SiF.sub.2).sub.n where n is greater than 1 and where the fiber may be 1 mm or less in diameter.
    Type: Grant
    Filed: September 5, 1984
    Date of Patent: August 5, 1986
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Shunpei Yamazaki
  • Critical temperature sensitive resistor material
    Patent number: 4603008
    Abstract: Disclosed herein is a critical temperature sensitive resistor material which comprises 60 to 90% by weight of VO.sub.2 and 40 to 10% by weight of RuO.sub.2. This material exhibits hysteresis of resistance that decreases remarkably over a temperature range in which the resistance varies greatly, and is hence used for measuring the temperature maintaining a high precision.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: July 29, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Hiromi Tosaki, Hideo Arima, Akira Ikegami, Yasuji Kamata