Patents by Inventor Roger M. Heitz

Roger M. Heitz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5792388
    Abstract: The present process involves forming the following mixtures of ingredients as parts A, B, C, D and E:Part A:1. diethyl toluene diamine (Reactant)2. 1-methoxy-2-propanol acetate (Solvent/Reactant)Part B:1. 1-methoxy-2-propanol acetate (Solvent)2. silyl polythioether polymer/methylene bis 4-cyclohexyl isocyanate (Reactant)Part C:1. benzyl phthalate (or other liquid plasticizer)Part D:1. N-beta (aminoethyl)-.gamma.-aminopropyltrimethoxy silane (liquid Reactant)Part E:1. Ag-coated hollow filler spheres.These mixtures are combined in the following steps:Step I--Combine Part C with Part D and mix thoroughly (no Reaction);Step II--Add Part B and mix well (Reaction);Step III--Add Part E, and mix well;Step IV--Add Part A and mix well (Reaction);Chemical reactions take place, when the above chemical compounds are added in the sequence indicated, to form a novel self-curing elastomeric composition.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: August 11, 1998
    Assignee: Northrop Grumman Corporation
    Inventors: Roger M. Heitz, Leon Burks, Jr., Nicholas T. Castellucci
  • Patent number: 5621062
    Abstract: Solvent-free, fluid polythioether coating or caulking compositions having excellent room-temperature self-curing properties and excellent leveling properties are produced by mixing reactive liquid precursor components comprising a hydroxyl- or silyl-terminated amino polythioether of formula A and a hydroxyl- or silyl-terminated epoxy polythioether of formula B. The mixture is applied to a surface to the protected, preferably a hydrolyzable metal surface such as aluminum which is reactive with the hydroxyl or silyl terminal groups, and cured at room temperature for less than two hours to produce a self-leveling protective coating or gap-fill which is strongly-bonded to the surface and is flexible and stable over a wide temperature range between about -60.degree. F. and +360.degree. F.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: April 15, 1997
    Assignee: Northrop Grumman Corporation
    Inventors: Nicholas T. Castellucci, Roger M. Heitz
  • Patent number: 5525262
    Abstract: A gap-fill or caulking composition, comprising one or more fluid polythioether polymers having reactive terminal groups, blended with hollow spheres coated with an inert electroconductive metal or metal nitride, which provide excellent chemical bonding with graphite composite surfaces, aluminum surfaces, including composite aluminum surfaces, and with epoxy, polyurethane, and acrylic primed surfaces.
    Type: Grant
    Filed: June 8, 1995
    Date of Patent: June 11, 1996
    Assignee: Northrop Grumman Corporation
    Inventors: Nicholas T. Castellucci, Roger M. Heitz
  • Patent number: 5429772
    Abstract: A gap-fill or caulking composition, comprising one or more fluid polythioether polymers having reactive terminal groups, blended with hollow spheres coated with an inert electroconductive metal or metal nitride, which provide excellent chemical bonding with graphite composite surfaces, aluminum surfaces, including composite aluminum surfaces, and with epoxy, polyurethane, and acrylic primed surfaces.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: July 4, 1995
    Assignee: Northrop Grumman Corporation
    Inventors: Nicholas T. Castellucci, Roger M. Heitz
  • Patent number: 4352851
    Abstract: A laminated barrier comprising alternate layers of rigidized low density lular material and ballistic nylon cloth useful in an aircraft for minimizing projectile and shrapnel damage, and possible fuel ignition in the fuselage caused by groundfire in the vicinity of fuel tanks located adjacent to the engines.
    Type: Grant
    Filed: December 16, 1980
    Date of Patent: October 5, 1982
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Roger M. Heitz, Franklin Hill
  • Patent number: 4115616
    Abstract: A self-sealing multi-laminated fuel line composite material composed of (a) a plastic fuel line, (b) a precompressed and fuel sensitive foam bonded to said plastic line, and (c) a flexible, plastic laminate bonded on top of said foam.
    Type: Grant
    Filed: February 9, 1978
    Date of Patent: September 19, 1978
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Roger M. Heitz, Franklin Hill