Patents Represented by Attorney Kurt C. Olsen
  • Patent number: 5902562
    Abstract: A method for preparing carbon materials having high surface area and high macropore volume to provide high permeability. These carbon materials are prepared by dissolving a carbonizable polymer precursor, in a solvent. The solution is cooled to form a gel. The solvent is extracted from the gel by employing a non-solvent for the polymer. The non-solvent is removed by critical point drying in CO.sub.2 at an elevated pressure and temperature or evaporation in a vacuum oven. The dried product is heated in an inert atmosphere in a first heating step to a first temperature and maintained there for a time sufficient to substantially cross-link the polymer material. The cross-linked polymer material is then carbonized in an inert atmosphere.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: May 11, 1999
    Assignee: Sandia Corporation
    Inventors: Robert R. Lagasse, John L. Schroeder
  • Patent number: 5840373
    Abstract: A method of stabilizing a strained flame in a stagnation flow reactor. By causing a highly strained flame to be divided into a large number of equal size segments it is possible to stablize a highly strained flame that is on the verge of extinction, thereby providing for higher film growth rates. The flame stabilizer is an annular ring mounted coaxially and coplanar with the substrate upon which the film is growing and having a number of vertical pillars mounted on the top surface, thereby increasing the number of azimuthal nodes into which the flame is divided and preserving an axisymmetric structure necessary for stability.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: November 24, 1998
    Assignee: Sandia Corporation
    Inventors: David W. Hahn, Christopher F. Edwards
  • Patent number: 5776384
    Abstract: A method for making near-net-shape, monolithic carbon electrodes for energy storage devices. The method includes the controlled pyrolysis and activation of a pressed shape of methyl cellulose powder with pyrolysis being carried out in two stages; pre-oxidation, preferably in air at a temperature between 200.degree.-250.degree. C., followed by carbonization under an inert atmosphere. An activation step to adjust the surface area of the carbon shape to a value desirable for the application being considered, including heating the carbon shape in an oxidizing atmosphere to a temperature of at least 300.degree. C., follows carbonization.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: July 7, 1998
    Assignee: Sandia Corporation
    Inventors: David W. Firsich, David Ingersoll, Frank M. Delnick
  • Patent number: 5710658
    Abstract: An optical system uses a nonlinear optical medium to alter the frequency of a relatively narrow band light source tunable over a plurality of different frequencies using an optical system for passively directing light to the nonlinear medium at a correct phase matching angle. In this manner, the light from the tunable light source can be efficiently frequency-doubled or frequency-tripled without the need of moving parts. An all prism design provides a system of optimal efficiency.
    Type: Grant
    Filed: December 13, 1995
    Date of Patent: January 20, 1998
    Assignee: Sandia Corporation
    Inventors: Alexander Gerson Jacobson, Scott Bisson, Rick Trebino
  • Patent number: 5703562
    Abstract: A method is described for transferring data from an unsecured computer to a secured computer. The method includes transmitting the data and then receiving the data. Next, the data is retransmitted and rereceived. Then, it is determined if errors were introduced when the data was transmitted by the unsecured computer or received by the secured computer. Similarly, it is determined if errors were introduced when the data was retransmitted by the unsecured computer or rereceived by the secured computer. A warning signal is emitted from a warning device coupled to the secured computer if (i) an error was introduced when the data was transmitted or received, and (ii) an error was introduced when the data was retransmitted or rereceived.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: December 30, 1997
    Assignee: Sandia Corporation
    Inventor: Curt A. Nilsen
  • Patent number: 5691080
    Abstract: Novel hybrid thin film electrolyte, based on an organonitrile solvent system, which are compositionally stable, environmentally safe, can be produced efficiently in large quantity and which, because of their high conductivities .apprxeq.10.sup.-3 .OMEGA..sup.-1 cm.sup.-1 are useful as electrolytes for rechargeable lithium batteries.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: November 25, 1997
    Assignee: Sandia Corporation
    Inventors: Dora K. Derzon, Charles Arnold, Jr.
  • Patent number: 5668188
    Abstract: A method of preparing near net shape, monolithic, porous SiC foams is disclosed. Organosilicon precursors are used to produce polymeric gels by thermally induced phase separation, wherein, a sufficiently concentrated solution of an organosilicon polymer is cooled below its solidification temperature to form a gel. Following solvent removal from the gel, the polymer foam is pretreated in an oxygen plasma in order to raise its glass transition temperature. The pretreated foam is then pyrolized in an inert atmosphere to form a SiC foam.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: September 16, 1997
    Assignee: Sandia Corporation
    Inventors: LeRoy Louis Whinnery, Monte Carl Nichols, David Roger Wheeler, Douglas Anson Loy
  • Patent number: 5661820
    Abstract: A method for detecting stellate lesions in digitized mammographic image data includes the steps of prestoring a plurality of reference images, calculating a plurality of features for each of the pixels of the reference images, and creating a binary decision tree from features of randomly sampled pixels from each of the reference images. Once the binary decision tree has been created, a plurality of features, preferably including an ALOE feature (analysis of local oriented edges), are calculated for each of the pixels of the digitized mammographic data. Each of these plurality of features of each pixel are input into the binary decision tree and a probability is determined, for each of the pixels, corresponding to the likelihood of the presence of a stellate lesion, to create a probability image. Finally, the probability image is spatially filtered to enforce local consensus among neighboring pixels and the spatially filtered image is output.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: August 26, 1997
    Inventor: W. Philip Kegelmeyer, Jr.
  • Patent number: 5648866
    Abstract: An optical system for efficiently directing a large bandwidth light (e.g., a femtosecond laser pulse) onto a nonlinear optical medium includes a plurality of optical elements for directing an input light pulse onto a nonlinear optical medium arranged such that the angle .theta..sub.in which the light pulse directed onto the nonlinear optical medium is substantially independent of a position x of the light beam entering the optical system. The optical system is also constructed such that the group velocity dispersion of light pulses passing through the system can be tuned to a desired value including negative group velocity dispersion.
    Type: Grant
    Filed: June 12, 1995
    Date of Patent: July 15, 1997
    Assignee: Sandia Corporation
    Inventors: Rick Trebino, Ken DeLong, Carl Hayden
  • Patent number: 5510212
    Abstract: A secondary battery having a rechargeable lithium-containing anode, a cathode, and a separator positioned between the cathode and anode with an organic electrolyte solution absorbed therein is provided. The anode comprises three-dimensional microporous carbon structures synthesized by the controlled pyrolysis of gel derived polymer foam precursors. The gradual heating process in the carbonization of pretreated foam precursors stabilizes the pore structures in the pretreated foam.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: April 23, 1996
    Inventors: Frank M. Delnick, Narayan Doddapaneni, Robert R. Lagasse, Ronald F. Simandl, D. Gerald Glasgow, Alan Sylwester
  • Patent number: 5449945
    Abstract: Silicon MSM photodiodes sensitive to radiation in the visible to near infrared spectral range are produced by altering the absorption characteristics of crystalline Si by ion implantation. The implantation produces a defected region below the surface of the silicon with the highest concentration of defects at its base which acts to reduce the contribution of charge carriers formed below the defected layer. The charge carriers generated by the radiation in the upper regions of the defected layer are very quickly collected between biased Schottky barrier electrodes which form a metal-semiconductor-metal structure for the photodiode.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: September 12, 1995
    Assignee: The United States of America as represented by the U.S. Department of Energy
    Inventors: Steven R. J. Brueck, David R. Myers, Ashwani K. Sharma
  • Patent number: 5426006
    Abstract: A secondary battery having a rechargeable lithium-containing anode, a cathode and a separator positioned between the cathode and anode with an organic electrolyte solution absorbed therein is provided. The anode comprises three-dimensional microporous carbon structures synthesized from polymeric high internal phase emulsions or materials derived from this emulsion source, i.e., granules, powders, etc.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: June 20, 1995
    Assignee: Sandia Corporation
    Inventors: Frank M. Delnick, William R. Even, Jr., Alan P. Sylwester, James C. F. Wang, Thomas Zifer
  • Patent number: 4607384
    Abstract: An arrangement for generating a classification code for a fingerprint having a pattern of ridges, the ridges having a plurality of reference features, which includes overlaying the intersection of a pair of cross-hairs at a first one of the reference features. A line is overlaid from a second one of the reference features to the first reference feature. The cross-hairs are oriented so that the line bisects a quadrant of the cross-hairs. The ridges crossed by predetermined portions of the cross-hairs are counted to generate the classification code.
    Type: Grant
    Filed: May 1, 1984
    Date of Patent: August 19, 1986
    Assignee: AT&T - Technologies, Inc.
    Inventor: James A. Brooks
  • Patent number: 4551580
    Abstract: Subband signals are formed each corresponding to a portion of an input signal frequency spectrum. The subband signals are partitioned into subband time segments. The subband time segment signals are permuted. The permuted signals are combined to form a scrambled signal.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: November 5, 1985
    Assignee: AT&T Bell Laboratories
    Inventors: Richard V. Cox, Nuggehally S. Jayant
  • Patent number: 4532626
    Abstract: In order to control the transfer of packets of information among a plurality of stations, e.g., digital computers, the instant communications system, station and protocol contemplate first and second oppositely directed signal paths. At least two stations are coupled to both the first and the second signal paths. A station includes arrangements for reading one signal from the first path and for writing another signal on the first path. The one signal is read from the first path by an arrangement which electrically precedes the arrangement for writing the other signal on the first path. A similar read arrangement is electrically preceding a write arrangement on the second path. If the station has a packet to transmit, it can overwrite a busy control field of the one signal packet on either path. Having read the one signal on the path, a logical interpretation may be made within the station as to whether the path is busy or is not busy.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: July 30, 1985
    Assignee: AT&T Bell Laboratories
    Inventors: Christopher Flores, Bhaskarpillai Gopinath, John O. Limb
  • Patent number: 4488243
    Abstract: In a speech recognition system, dynamic time warp (DTW) calculations are reduced by use of a search strategy for an optimal non-linear search warp function path: signals predictive of the similarity are generated responsive to the preceding and current correspondence signals of the input word to reference warped words.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: December 11, 1984
    Assignee: AT&T Bell Laboratories
    Inventors: Michael K. Brown, Lawrence R. Rabiner
  • Patent number: 4477580
    Abstract: Optical components using a germania-silica glass are made by a gel technique. Tetra pentyloxygermane and a silicon alkoxide are hydrolyzed to form a gel, which is subsequently dried. Optical components, including optical fibers and devices, can be made using glass prepared by this technique.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: October 16, 1984
    Assignee: AT&T Bell Laboratories
    Inventor: James W. Fleming, Jr.
  • Patent number: 4426722
    Abstract: An arrangement for generating x-ray microbeams includes an electron source for generating an electron beam. The electron beam is directed toward a target comprising discrete x-ray emissive spots. X-rays from the spots are formed into microbeams and directed through an examination field.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: January 17, 1984
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Osamu Fujimura
  • Patent number: 4417102
    Abstract: Improved digital encoding of an input speech signal for transmission uses an adaptive low-pass filter and adaptive coder responsive to the total spectral energy of the input signal, thereby providing reduced coder bit rate at constant coder noise, or conversely reduced coder noise at constant bit rate.
    Type: Grant
    Filed: June 4, 1981
    Date of Patent: November 22, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Jonathan B. Allen
  • Patent number: 4412123
    Abstract: An electrically heated soldering device adapted to simultaneously heat a plurality of spaced electrical elements in a reflow soldering operation includes an elongated metal laminate of substantially U-shaped cross section having a bight portion between two side portions which may be parallel or divergent. The laminate includes a layer of aluminum between a layer of copper and a layer of stainless steel, with the layers being roll bonded together. The copper and aluminum layers are removed at the bight portion to expose the stainless steel layer and form a heat generating zone for contacting the plurality spaced electrical elements which is corrosion resistant and nonwettable by solder. The edges of the copper and aluminum layers adjacent to the exposed stainless steel bight portion are shaped to impart a selectable temperature profile, either uniform or non-uniform along the length of the bight portion.
    Type: Grant
    Filed: May 9, 1980
    Date of Patent: October 25, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Hans H. Ammann, Rocco Bonanni, Werner Engelmaier