Patents Represented by Attorney, Agent or Law Firm Kendrew H. Colton
  • Patent number: 6235894
    Abstract: The present invention relates to heat stable high viscosity starches. The starches of the present invention are obtained by reacting high viscosity starch with activated chlorine under alkaline conditions. The starches of the present invention are used to replace viscosity stable starches obtained by conventional chemical cross-bonding.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: May 22, 2001
    Assignee: Cerestar Holding B.V.
    Inventors: Bernd Wolfgang Kettlitz, Jozef Victor Jean Marie Coppin
  • Patent number: 5369955
    Abstract: A rocket motor or other gas generator the case of which is ventable at a predetermined temperature substantially greater than the ambient temperature range for storage and operation thereof and substantially less than the auto-ignition temperature of gas generant material contained therein so as to prevent catastrophic propulsion or burst in case of fire. In order to provide such venting without requiring any shaped charges or other auxiliary system for that purpose at all, the case is composed of a matrix-impregnated fibrous material wherein the fibrous material is characterized by having a melting point which is substantially higher than the ambient temperature range and which is substantially lower than the auto-ignition temperature of the gas generant material. The matrix material is preferably actinic radiation-curable at a temperature which is substantially lower than the melting point temperature of the fibrous material.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: December 6, 1994
    Assignee: Thiokol Corporation
    Inventors: Frederick W. VanName, Victor Singer
  • Patent number: 5363768
    Abstract: A propellant system is disclosed which includes a propellant applied to at least one surface of a substrate which is in the form of a strip. The propellant strip is adhesively attached to itself in a configuration which conceals propellant within the configuration and which allows the attached strip to peel away from itself under applied forces thereby resulting in smooth and continuous exposure of propellant for burning. The system is directed to use with ejectable projectiles which are slidably disposed within a canister or casing. The propellant system is interconnected between the projectile and the canister which houses the projectile. The propellant is urged to peel, and thus expose propellant for burning, as the projectile is ejected from the canister.
    Type: Grant
    Filed: April 2, 1991
    Date of Patent: November 15, 1994
    Assignee: Thiokol Corporation
    Inventors: Mark A. Solberg, James A. Hartwell
  • Patent number: 5341638
    Abstract: A composite structure for rocket motors includes a longitudinal element of the composite structure, which is an assembly of segments of clamshell or barrel stave form. The element is held in place by a circumferential element, which is a composite overwrap of reinforcing fibers in a resin matrix. The matrix may be thermoplastic or thermosetting. The reinforcing fiber being high strength polyolefin thereby providing the rocket motor with insensitive munitions capability.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: August 30, 1994
    Assignee: Thiokol Corporation
    Inventors: Frederick W. Van Name, Michael A. Gerace, Victor Singer, Brendan M. Walsh
  • Patent number: 5311820
    Abstract: A heat sensitive case/nozzle interface is provided for an insensitive propellant-loaded munition such that the interface loses its structural integrity when high external heat is applied. The joint between a rocket case housing a rocket motor and nozzle forming the interface is received by an internal spring retainer positioned in a first groove in the case or nozzle in cooperation with a fusible material housed in an aligned second groove in the nozzle or case, respectively. A plurality of aligned openings extend into said first and second grooves. When the rocket is exposed to a high ambient temperature greater than melt temperature of the fusible material but lower than the auto-ignition temperature of the rocket, the fusible material melts and is forced through said holes by the spring retainer permitting the nozzle to separate from the case rendering the rocket motor safe if it auto-ignites.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: May 17, 1994
    Assignee: Thiokol Corporation
    Inventor: Warren Ellingsen
  • Patent number: 5292387
    Abstract: Ammonium nitrate is phase-stabilized against Phase IV.rarw..fwdarw.Phase III transition and the undesired volume changes associated with that phase change by including an effective amount of at least one metal dinitramide salt having the formula MX.sub.n wherein M is a metal cation, X is a dinitramide anion, and n is 1, 2 or 3. The phase-stabilized ammonium nitrate is useful in energetic applications such as solid propellants and explosives.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: March 8, 1994
    Assignee: Thiokol Corporation
    Inventors: Thomas K. Highsmith, Carol J. Hinshaw, Robert B. Wardle
  • Patent number: 5266290
    Abstract: The present invention pertains to a method for making energetic oxidizer salts and solutions thereof, and in particular relates to processes for making aqueous solutions of hydroxylammonium nitrate in high purity suitable for use in making liquid gun propellants. The present alcohol-free process yields high purity alcohol-free hydroxylammonium nitrate in a simple chemical neutralization reaction by combining an aqueous nitric acid solution 120 to 70 wt. %) with an alcohol-free aqueous hydroxylamine solution at temperatures ranging from about C. to above ambient to produce the desired alcohol-free aqueous hydroxylammonium nitrate solution in a usable concentration and in high purity. The process is economical, environmentally acceptable, and facile.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: November 30, 1993
    Assignee: Thiokol Corporation
    Inventors: Michael L. Levinthal, Rodney L. Willer, Dennis J. Park, Ronnelle Bridges
  • Patent number: 5240523
    Abstract: Propellant compositions have an elastomeric binder formed by curing a hydroxyl-terminated polyether or polyester prepolymer with cis-,cis-1,3,5-tri(isocyanatomethyl) cyclohexane. The propellant compositions also include high-energy particulates and high-energy plasticizers. The use of cis-cis-1,3,5-tri(isocyanatomethyl)cyclohexane increases the energy of the propellant per binder weight and in several cases substantially improves the mechanical characteristics of the propellant composition.
    Type: Grant
    Filed: July 11, 1988
    Date of Patent: August 31, 1993
    Assignee: Thiokol Corporation
    Inventor: Rodney L. Willer