Patents Represented by Attorney John R. Nesbitt
  • Patent number: 4080567
    Abstract: A heat sensitive abnormal current condition detecting and indicating device associated with a watthour meter indicates that a possibly damaging surge has been experienced by the meter. The abnormal condition detecting and indicating device includes indicator means retained in normal position by a heat sensitive material, such as solder, with the indicator means being biased to move from the normal position to an abnormal condition position should the conductor being monitored experience a heat rise sufficient to soften the heat sensitive material and release the indicator means.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: March 21, 1978
    Assignee: Duncan Electric Company, Inc.
    Inventors: Wallace C. Kemp, John M. Carr
  • Patent number: 4071444
    Abstract: A small, portable, chemical reactor adapted to tap the venous blood supply of a patient, said device including a stack of semi-permeable membranes blood and dialysis materials in alternate chambers, said stack being held in sealed relationship by a single center bolt which facilitates quick assembly and disassembly.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: January 31, 1978
    Assignee: Purdue Research Foundation
    Inventors: Stephen R. Ash, Philip G. Wilcox, David P. Kessler
  • Patent number: 4059681
    Abstract: Stable dried aluminum hydroxide gels possessing the high acid reactivity of liquid aluminum hydroxide gel are prepared by drying the gel from non-aqueous solvents.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: November 22, 1977
    Assignee: Purdue Research Foundation
    Inventors: Stanley L. Hem, Joe L. White
  • Patent number: 4051539
    Abstract: A demultiplexing method and system is disclosed utilizing a differential duration technique. Data that have been conventionally encoded utilizing a technique wherein variations in time contain the essential information, such as can be accomplished by systems wherein data are encoded by modulating either the spacing between pulses or the width of the pulses, is decoded by differential duration demultiplexing to reduce errors caused by time distortion introduced prior to recovery of the data. Time distortion errors are reduced by sensing both the pulses and intervals following the pulses in the data train and deriving decoded data from the difference therebetween.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: September 27, 1977
    Assignee: Purdue Research Foundation
    Inventors: Leslie A. Geddes, Joe D. Bourland
  • Patent number: 4041692
    Abstract: An electronic clock is disclosed having a time indicating light display on the clock face with the light display being provided by a plurality of light emitting diodes positioned to form three spaced concentric rings for separately indicating time in seconds, minutes and hours. An input signal having a frequency of 60 hertz is frequency divided to provide a signal having a frequency of one hertz that is coupled to a seconds decoder connected to a first 6.times.10 LED matrix. One pulse per minute is provided from the seconds decoder to a minutes decoder that is connected to a second 6.times.10 LED matrix, and one pulse per hour is provided from the minutes decoder to an hours decoder that is connected with a 1.times.12 LED matrix.
    Type: Grant
    Filed: January 8, 1976
    Date of Patent: August 16, 1977
    Assignee: Amelect Incorporated
    Inventor: James B. Marshino
  • Patent number: 4041111
    Abstract: Synthesis of phosphonate monoesters, as well as the use of such monoesters as substrates for enzymes which normally hydrolyze phosphodiester linkages, and a method for distinguishing between Type I and Type II phosphodiesterase enzymes using such monoesters as substrates are disclosed herein. Monoesters of phosphonic acids are prepared by the displacement of chloride from an appropriate phosphonic acid dichloride by a phenol or alcohol with pyridine as the solvent, reacting the same and then removing the solvent, after which the remaining ester chloride and dichloride are hydrolyzed by addition of water. The acid and ester are then separated and the acid-free ester is taken up in a polar organic solvent and precipitated as a salt by the addition of aqueous base, with the product then being filtered, washed with fresh acetone, dried and then stored until needed.
    Type: Grant
    Filed: March 4, 1975
    Date of Patent: August 9, 1977
    Assignee: Purdue Research Foundation
    Inventors: Susan J. Kelly, Larry G. Butler
  • Patent number: 4032296
    Abstract: An electrolytic conductivity detector system is disclosed that is particularly useful for gas chromatography. Small gas molecules that will support conductivity are conducted to a gas-liquid contactor where the gas is mixed with a solvent to form a heterogeneous gas-liquid mixture. The gas-liquid mixture is thereafter directed to a gas-liquid separator and a conductivity cell where liquid phase is separated from gas phase and separated liquid phase utilized for conductivity measurement. A unitized gas-liquid separator-conductivity cell may be utilized that includes an inner electrode tube extending upwardly into a larger diameter bore of a metallic outer electrode block, the portion between the block and upper portion of the tube forming a liquid phase reservoir with the liquid phase in the reservoir being utilized for conductivity measurement while between the two electrodes.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: June 28, 1977
    Assignee: Purdue Research Foundation
    Inventor: Randall C. Hall
  • Patent number: 4029085
    Abstract: A method is disclosed for determining the bilirubin concentration in the blood serum of a person from measurement of the spectral reflectance of the skin. The disclosed method detects the severity of jaundice, a common neonatal condition, and enables determination of the type of treatment regimen needed to prevent the bilirubin level from becoming sufficiently high to cause kernicterus which can result in brain damage. The method includes measuring the reflectance of the skin within a predetermined frequency spectrum, and more particularly at a number of specific wavelengths in the visible portion of the spectrum.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: June 14, 1977
    Assignee: Purdue Research Foundation
    Inventors: David P. DeWitt, Robert E. Hannemann, John F. Wiechel
  • Patent number: 4029583
    Abstract: Chromatographic supports are disclosed as are methods and apparatus for preparing the same. The support includes an inorganic support matrix that is capable of reacting with silanols, a stationary phase, and an intermediate silane coupling agent having a silicon functional group capable of bonding to the support surface and an organic functional group capable of bonding to the stationary phase. The inorganic support matrix is preferably controlled porosity glass or silica while the coupling agent may include a simple carbohydrate, a carbohydrate derivative, or a polymer to which the stationary phase is attached. A plurality of chromatographic supports and stationary phases are disclosed and two methods of bonding of stationary phases to supports are also disclosed. In addition, apparatus including a fluidized bed is also disclosed to prepare supports.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: June 14, 1977
    Assignee: Purdue Research Foundation
    Inventors: Shung Ho Chang, Frederick E. Regnier
  • Patent number: 4027893
    Abstract: A force absorbing hitch for a vehicle is disclosed. The hitch is capable of at least partially absorbing external forces exerted on the hitch as would be common with the hitch attached to a vehicle for towing of a trailer or the like, particularly those encountered due to acceleration or deacceleration of the towing vehicle. The hitch includes a hitch plate upon which a hitch ball can be mounted with the hitch plate having a pair of rods extending from one edge through apertures in a pair of spaced walls of a frame attached to the rear of the vehicle. Between the walls a stop plate is fastened to the rods and springs surrounding the rods are located at each side of the stop plate on both rods. The frame can be elongated to serve as a bumper or bumper extension with the hitch centrally located on the bumper and below a recess, or step, in the bumper behind which a license plate can be mounted, if desired.
    Type: Grant
    Filed: October 31, 1975
    Date of Patent: June 7, 1977
    Inventor: Forrest R. Drudge
  • Patent number: 4023506
    Abstract: A system and process is disclosed for providing a durability enhanced area that is particularly well suited for use as an athletic playing field. A vegetative crop has one or more layers of netting associated therewith so that each layer of netting has portions of the vegetative crop extending therethrough. With grass utilized as the vegetative crop and the growing points of the grass within a rooting medium, the blades of the grass extend upwardly through a top layer of netting contiguous to and above the rooting medium to protect the growing points of the grass and to prevent excessive divoting when the area is used as an athletic playing field. A second layer of netting is positioned below the rooting medium so that the roots of the grass extend therethrough to give the turf the support strength that is particularly required where the area is used as an athletic playing field for playing a game such as football. Additional layers of netting may be utilized where needed or desired.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: May 17, 1977
    Assignee: Purdue Research Foundation
    Inventor: Melvin J. Robey
  • Patent number: 4022814
    Abstract: Iodo-aryl carbonates, such as for example, p-iodo-benzyl carbonates, p-iodo-sec-phenethyl carbonates, p-iodo-phenethyl carbonates, p-iodo-phenyl carbonates, 3-(p-iodophenyl)propyl carbonates, 3-(p-iodophenyl)butyl carbonates, 2-(p-iodobenzyl)butyl carbonates and 2-(p-iodobenzyl)-n-hexyl carbonates, for use as radiographic media in connection with such techniques as x-ray applications including myelography, salpingography, lymphography and bronchography. An effective quantity of iodinated organic carbonate provides x-ray contrast, and the compounds of the invention may be characterized generally as carbonates having the general formula ##STR1## wherein R represents an alkyl group having from 4 to 10 carbon atoms and R' represents an iodinated phenyl linked to the ester oxygen through an alkyl chain consisting of 1 to 3 carbon atoms.
    Type: Grant
    Filed: April 22, 1976
    Date of Patent: May 10, 1977
    Assignee: Lafayette Pharmacal, Inc.
    Inventor: Barry N. Newton
  • Patent number: 4022950
    Abstract: A device to convert solar energy into electricity, making use of the reversible photogalvanic principle. This principle is based on the spontaneous light and dark reactions between two electrochemical half cells constructed from a reversible electrochemical reaction. The device uses photosensitizers that operate in a broad band infrared spectral region.The specific photosensitizer used is chlorophyll a coated on a platinum electrode suspended in an ionic salt solution on one side of the cell and a platinum electrode is also suspended on the other side of the half cell in a hydroquinone solution, and the electrodes are electrically connected, these solutions are interconnected by a salt bridge which permits the flow of cation charge reversibly between said first and second half cells upon on-off light irradiation of the chlorophyll coated electrode.
    Type: Grant
    Filed: January 14, 1976
    Date of Patent: May 10, 1977
    Assignee: Purdue Research Foundation
    Inventors: Francis K. Fong, Nicholas Winograd
  • Patent number: 4017795
    Abstract: A heat sensitive fault detecting and indicating system and method for a watthour meter is disclosed herein. The illustrated watthour meter includes a potential stator and a current stator both of which are mounted on a frame assembly, the assembly also having mounted thereon one or more permanent magnets and a rotatable disk assembly with disk rotation being recorded on the recording dials of a register assembly visible through the enclosing glass cover of the meter. The current stator includes a pair of current coils which coils have a heat sensitive fault detecting and indicating device associated therewith. The heat sensitive fault detecting and indicating device illustrated includes a layer of low melting point metal, such as tin, for example, which layer is covered by a sheath, such as a plastic sheath, for example, with predetermined portions of the sheath being thinned, as by embossing, for example, with a predetermined symbol or other indicia.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: April 12, 1977
    Assignee: Duncan Electric Company, Inc.
    Inventor: James W. Milligan
  • Patent number: 4006059
    Abstract: Proteins such as enzymes are noncovalently immobilized by treating a hydrophilic support material having hydroxyl or amino groups with an acid chloride of a hydrophobic acid such as phenoxyacetyl chloride and to the resultant hydrophobic support material adsorbing a protein.
    Type: Grant
    Filed: July 29, 1974
    Date of Patent: February 1, 1977
    Assignee: Purdue Research Foundation
    Inventor: Larry G. Butler
  • Patent number: 4004980
    Abstract: Enzymes are entrapped by preparing a polymer formulation containing cellulose triacetate and cellulose diacetate or glucose pentaacetate, adding an enzyme to the formulation, extruding the enzyme-containing formulation to form a solid matrix and soaking the solid matrix in an aqueous solution of acetone to swell and increase the permeability of the solid matrix.
    Type: Grant
    Filed: March 25, 1975
    Date of Patent: January 25, 1977
    Assignee: Purdue Research Foundation
    Inventors: Alden H. Emery, Henry C. Lim, Michael J. Kolarik
  • Patent number: 3998949
    Abstract: A compound, namely 5-thio-D-glucose, and use thereof for a male contraceptive is disclosed herein. 5-Thio-D-glucose is administered periodically to inhibit development of sperm cells (spermatozoa). Sperm cells are arrested at the immature sperm cell level by administration of 5-thio-D-glucose, and this arrestment of cell development is maintained so long as administration of 5-thio-D-glucose is continued. After discontinuance of administration of 5-thio-D-glucose, however, the sperm cells again develop and normal sperm cell production is resumed.
    Type: Grant
    Filed: March 13, 1975
    Date of Patent: December 21, 1976
    Assignee: Purdue Research Foundation
    Inventor: Roy L. Whistler
  • Patent number: PP3988
    Abstract: 1. A new and distinct apple tree substantially as shown and described particularly characterized by resistance to apple scab, smooth skin, excellent fresh fruit quality characterized by the ability to maintain quality without shrivelling in storage, and outstanding processing ability, said fruit maturing substantially at the same time as "Golden Delicious".
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: December 14, 1976
    Assignee: Purdue Research Foundation
    Inventors: Daniel F. Dayton, James B. Mowry, L. Frederick Hough, Catherine Bailey, Edwin B. Williams, Jules Janick, Frank H. Emerson, J. Ralph Shay
  • Patent number: PP4055
    Abstract: 1. A new and distinct variety of peach tree substantially as shown and described.
    Type: Grant
    Filed: January 7, 1976
    Date of Patent: May 17, 1977
    Assignee: Hilltop Orchards & Nurseries, Inc.
    Inventor: Alton C. Wendzel
  • Patent number: PP4096
    Abstract: This invention relates to a limb mutation of the Law strain of Red Rome apple, and differs therefrom by its dwarf habit and spurring.
    Type: Grant
    Filed: October 6, 1976
    Date of Patent: August 30, 1977
    Assignee: Hilltop Orchards & Nurseries, Inc.
    Inventor: Dan E. Simmons