Patents Represented by Attorney Robert A. Cesari
  • Patent number: 4091924
    Abstract: An improved magnetic tape having the property of retaining magnetic data even when spooled and subjected to high temperature environments. This thermal resistance is suitably achieved by providing a backing coating which contacts the magnetic-particle-bearing facing coating of the tape and is chemically incompatible therewith. Pairs of chemically-incompatible coatings include polyester polyurethane-polyether-polyurethane; polyfluorinated hydrocarbons-polyurethane. A conductive furnace carbon black is advantageously used in the backing coating, and the substrate is, suitably, temperature-resistant polyimide.
    Type: Grant
    Filed: January 2, 1976
    Date of Patent: May 30, 1978
    Assignee: Graham Magnetics Incorporated
    Inventor: Gerald S. Newton
  • Patent number: 4092459
    Abstract: Novel powders, and resinous compositions bearing said powders, characterized by excellent chemical stability, electrical conductivity, and energy-absorbing characteristics. These three characteristics can be utilized, alone or combination, in forming many novel articles including microwave shielding apparatus, magnetic recording media, explosives, and the like. The more advantageous powders are characterized by a very thin coating of an electrically conductive metal carbide, metal silicide, or metal boride upon the surface thereof, and a metal core.
    Type: Grant
    Filed: January 13, 1975
    Date of Patent: May 30, 1978
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Grover Lee Johnson
  • Patent number: 4087842
    Abstract: Playback method and apparatus compensate exactly for both tracking and speed errors due to any eccentricity in the information track on a rotating recording member during playback by moving the read head in a circular path having the same radius, angular velocity and phase as the circle of eccentricity of the track.
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: May 2, 1978
    Assignee: Graham Magnetics Inc.
    Inventor: William A. Manly
  • Patent number: 4075672
    Abstract: An improved magnetic recording member of the disc type. The article of the invention is formed, preferably, of metallic magnetic particles oriented in a vertical direction. This combination overcomes existing limitations on (a) disc products, and (2) the preferred metallic particles heretofore known.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: February 21, 1978
    Assignee: Graham Magnetics Incorporated
    Inventor: William A. Manly
  • Patent number: 4071590
    Abstract: Novel composite asymmetrical membranes, comprising a support membrane and a filtration membrane, and process for making the same. The novel membranes are formed by making a sequence of two-stage membranes, one formed upon the other. The process makes possible the formation of both a support membrane and filtration membrane from the same material rather than, as was necessary in the prior art, formation of a filtration membrane only from a different polymer soluble in solvent media which would have no substantial effect on the support membrane.
    Type: Grant
    Filed: October 31, 1975
    Date of Patent: January 31, 1978
    Assignee: Forschungsinstitute Bergof GmbH
    Inventor: Heinrich Strathmann
  • Patent number: 4061824
    Abstract: Improved processes and products based on the discovery that metal atoms in complex relationship with complexing agents can be used to moderate the formation of organic salt seed crystals which promote an exceptionally well-ordered acicular growth of organometallic salts such as oxalates of the metal. Some acicular, i.e. needle-like, products have particular utility for being reduced to ferromagnetic metal particles which retain a surprisingly large degree of acicularity and possess extraordinarily favorable properties for use in magnetic recording applications.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: December 6, 1977
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Wesley R. Tyler
  • Patent number: 4054139
    Abstract: A percutaneous lead device such as a catheter, or a urinary tract catheter, which comprises an oligodynamic agent such as metallic silver or its compounds, alone or in association with other heavy metals such as gold, for the purpose of reducing infection associated with these devices. The oligodynamic agent is on both interior and exterior surfaces of tube-like catheters.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: October 18, 1977
    Inventor: Kent B. Crossley
  • Patent number: 4054530
    Abstract: A magnetic tape based on a cobalt-nickel-iron powder having an extraordinary combination of chemical stability and magnetic properties.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: October 18, 1977
    Assignee: Graham Magnetics, Inc.
    Inventor: Robert J. Deffeyes
  • Patent number: 4042327
    Abstract: Liquid chromatographic processing of compositions containing ionizable compounds. The chromatographic column is formed of a stationary packing having a chemical group chemically bonded thereto and a counter ion is added to the polar mobile liquid. The counter ion forms a reversible complex with at least one characterizing radical of at least one of the ionizable compounds.
    Type: Grant
    Filed: January 15, 1976
    Date of Patent: August 16, 1977
    Assignee: Waters Associates, Inc.
    Inventors: William G. Haney, Douglas P. Wittmer
  • Patent number: 4038169
    Abstract: Apparatus for selective electroplating of discreet areas of strips intermittently advanced through said apparatus. A particularly important aspect of the apparatus is the means whereby the strip is advanced intermittently but is, at all times, held under tension by a dual-clutch arrangement comprising two indexing wheels, a drag clutch positioned to control tension on a first wheel at one side of the electroplating bath, and another indexing wheel intermittently operated to advance the strip on intermittent engagement by controlled by a second clutch mechanism.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: July 26, 1977
    Assignee: National Plastics & Plating Supply
    Inventors: Curtis N. Lovejoy, Leo N. Kosowsky, Paul C. Holte
  • Patent number: 4036360
    Abstract: A package comprising a dessicant material consisting essentially of 1 a dessicant and 2 tough, film-forming, resin having a high moisture vapor transmission rate. A prepolymerized polyurethane is particularly useful. The material is of particular value as a package insert - e.g. with film or cameras or as a coating material which can be utilized on equipment to be protected or, most advantageously, on the interior walls of packaging boxes and the like.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: July 19, 1977
    Assignee: Graham Magnetics Incorporated
    Inventor: Robert J. Deffeyes
  • Patent number: 4028458
    Abstract: In a method for making hot melt adhesive sticks and other shapes for subsequent use in hot melted adhesive applicators, a charge of a hot melt adhesive is injected into one end of a cooling chamber, the opposite end of the chamber being sealed by a solid plug from a previous adhesive charge. This first charge is maintained under pressure until its outside wall forms and sets so that any shrinkage occurs at the end of the charge. That shortage is made up when the next charge of hot melt adhesive is injected into the chamber. If the first charge has not set sufficiently to be self-supporting, the pressure of the next charge balloons the soft side walls of the insufficiently set charge outward against the chamber walls so that that charge does not move along the chamber, but remains for another complete cycle of operation until it is ready. Thus each adhesive stick ejecting from the opposite end of the chamber is uniform, accurately dimensional and solid.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: June 7, 1977
    Assignee: Transworld Adhesive & Chemical Corporation
    Inventor: Ray H. Wallace
  • Patent number: 4027983
    Abstract: A plate-like structure comprising a liquid flow path formed in one face thereof, a thin ductile seal-forming coating on the face of the structure which forms the flow path. The structure finds many utilities, most advantageously in constructing a novel valve wherein the disk is flexible and adapted for flexing a central face portion thereof against a conduit, thereby sealing said conduit.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: June 7, 1977
    Assignee: Waters Associates, Incorporated
    Inventor: Louis Abrahams
  • Patent number: 4026803
    Abstract: Novel end fitting assemblies of particular advantage for use on liquid chromatographic columns, and novel chromatographic columns comprising these novel end fittings. The end-fittings are characterized by (a) very low dead space; (b) economical and convenient replacement of wearing parts; with minimal disturbing of the packed column, or other functional end-fitting components such as cones, filters, etc. A particular advantage is the design whereby the connector portions of the fitting assembly are not normally wetted by process fluids during operation of the column. Thus, the connector portions of the assemblies can be selected from a wide variety of mechanically-desirable materials selected for their wearing characteristics. Moreover, the fittings can be tightened for high-pressure operation without damage to the structure of the column of which they are used.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: May 31, 1977
    Assignee: Waters Associates
    Inventors: Louis Abrahams, Manuel A. Russo
  • Patent number: 4020227
    Abstract: Magnetic tape having extraordinary performance characteristics and formed with a sparingly-crosslinked, polyurethane-based polymer binder system as a matrix for magnetic particles. The binder system is characterized by toughness of at least 150 in-lbs. per in.sup.3, and the ability to withstand video tape-Test for over an hour before any substantial tape degradation occurs. Magnetic coatings prepared according to the invention comprise a binder system of at least 50% of a tough polyurethane.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: April 26, 1977
    Assignee: Graham Magnetics Incorporated
    Inventor: Robert J. Deffeyes
  • Patent number: D244325
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: May 17, 1977
    Assignee: Hedstrom Co.
    Inventor: Charles Voytko
  • Patent number: D246811
    Type: Grant
    Filed: August 4, 1976
    Date of Patent: January 3, 1978
    Inventors: Gerhart P. Klein, Brigitte I. Klein
  • Patent number: D246838
    Type: Grant
    Filed: January 21, 1976
    Date of Patent: January 3, 1978
    Inventor: Robert J. Boudreau
  • Patent number: D247217
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: February 14, 1978
    Assignee: Schaefer Marine Products
    Inventor: Carl A. Merry
  • Patent number: D247661
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: April 4, 1978
    Inventors: Allen D. Willard, Mario A. Genovese