Patents Represented by Attorney Steven F. Stone
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Patent number: 4254055Abstract: Tetrasodium pentaerythrityl tetrakis (dithiocarbamate) has been found to be an unusually stable lead precipitant which can be incorporated in coatings to be applied over lead painted surfaces to detoxify the same. The preparation of TSPTD from carbon disulfide sodium hydroxide and pentaerythrityl tetramine by simple mixing thereof does not produce satisfactory yields because of undesirable side reactions. The TSPTD can be produced in high yields by the gradual addition of sodium hydroxide to a mixture of pentaerythrityl tetramine in an excess of carbon disulfide.Type: GrantFiled: June 6, 1977Date of Patent: March 3, 1981Assignee: United Technologies CorporationInventors: Harry J. Hyer, John E. Sundberg
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Patent number: 4248940Abstract: Adherent, thermal shock-resistant protective coatings for nickel base super alloys are obtained by applying to the base metal a thin bond coat of an alloy of chromium aluminum and yttrium with materials selected from the group consisting of iron, cobalt, nickel and nickel-cobalt and applying thereover a continuously graded mixture of this material with a zirconia-based ceramic, the concentration of zirconia-based ceramic increasing from the bond coat to the outer layer. The zirconia ceramic may be stabilized by the addition thereto of amounts of magnesium oxide or other materials.Type: GrantFiled: June 30, 1977Date of Patent: February 3, 1981Assignee: United Technologies CorporationInventors: George W. Goward, Delton A. Grey, Richard C. Krutenat
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Patent number: 4246233Abstract: An inert carrier process for drying radioactive waste material and for incorporating the dry material into a binder from which the dried material will not be leached is disclosed. In this process, a hot inert liquid carrier is provided into which the solution to be dried is introduced under extremely turbulent conditions. The solvent flashes off leaving the dried particles dispersed in the inert carrier which carries these particles to a mixing station where a binder for the particles is injected under turbulent conditions. The binder preferentially wets the particles and the coated particles are carried to a separator section where the binder coated particles coalesce and separate from the carrier as a second phase. Thereafter a curing agent can be added to the binder.Type: GrantFiled: August 23, 1978Date of Patent: January 20, 1981Assignee: United Technologies CorporationInventor: Randall D. Sheeline
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Patent number: 4221617Abstract: Certain surfactants as additives for castable composite solid propellants improve the physical properties of the cured solid propellant and improve the castability of the uncured solid propellant mix.Type: GrantFiled: September 30, 1966Date of Patent: September 9, 1980Assignee: United Technologies CorporationInventors: Thomas P. Rudy, Jack K. West
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Patent number: 4181545Abstract: Contaminant metal ions of the transition elements such as copper and iron for example may give rise to serious problems in the curing of polymeric binders for conventional rubber-based solid propellants. These metal ions may accelerate the curing action to such a degree that the potlife of the freshly mixed polymer is reduced. Also, the metal ions may promote oxidative degradation of cured and uncured polymeric systems. These undesirable effects can be prevented by adding to the uncured polymer certain polymer-soluble agents which are capable of forming stable complexes with the undesirable metal ions in which the valence of the metal ion is fixed. These agents are selected from a large group of compounds and compositions comprising certain hydroxy substituted aromatic compositions. The preferred embodiments are pyrogallol, propyl gallate, octyl gallate, decyl gallate, purpurogallin and alizarin.Type: GrantFiled: April 28, 1977Date of Patent: January 1, 1980Assignee: United Technologies CorporationInventor: William S. Anderson
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Patent number: 4179944Abstract: An electromechanical actuator is provided which is capable of disconnecting the output shaft and the drive mechanisms in such a way that, in the event of either a rotational or translational failure during operation, the output shaft can be effectively freed in such a manner that it will not resist the motion produced by other actuators which have not failed.Type: GrantFiled: June 27, 1977Date of Patent: December 25, 1979Assignee: United Technologies CorporationInventor: Gary E. Conner
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Patent number: 4169555Abstract: Extendible exit cones for reaction motor nozzles of the telescoping or "Boy Scout cup" type are provided whereby positive locking means are used to maintain the exit cones in their extended positions against the aerodynamic and internal pressure forces experienced by the nozzle.Type: GrantFiled: July 25, 1977Date of Patent: October 2, 1979Assignee: United Technologies CorporationInventor: Gearld E. Crowe
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Patent number: 4166045Abstract: Combustion catalysts for solid propellants are extracted with a solution comprising a solvent in which the catalyst is essentially insoluble and a solute which is an effective chelating agent for metal ions which are present as interfering impurities in the combustion catalysts. This treatment does not affect the activity of the catalyst as a combustion catalyst in a solid propellant; however, the removal of the metal ions greatly increases the pot life of the solid propellant composition prior to cure and enhances its stability after cure.Type: GrantFiled: May 2, 1973Date of Patent: August 28, 1979Assignee: United Technologies CorporationInventors: Thomas P. Rudy, Toshio W. Nakagawa
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Patent number: 4142023Abstract: A method for coating a nickel-base superalloy substrate with a nickel-aluminide coating, saturated with chromium and containing no precipitated phases is disclosed which comprises enriching the superalloy substrate with chromium by diffusion of chromium into the substrate at a rate below that at which a pure or alloyed chromium layer forms and then growing a nickel aluminide coating on the chromium enriched substrate surface by the outward diffusion of nickel from the substrate into an aluminum-containing pack in which the source of aluminum is the stoichiometric intermetallic compound NiAl, or a metal powder mixture having the overall aluminum activity of NiAl.Type: GrantFiled: August 24, 1977Date of Patent: February 27, 1979Assignee: United Technologies CorporationInventors: Norman S. Bornstein, Michael A. DeCrescente
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Patent number: 4132816Abstract: A gas phase aluminizing process for alloys based on Group VI B and VIII metals such as chromium, iron, cobalt and nickel is disclosed. The process is particularly useful in the coating of internal passages of complex high temperature gas turbine hardware such as blades and vanes, where it has been found that the complex aluminum halide activators used herein have a "throwing power" greater than was heretofore obtained with the conventional halide activators such as ammonium chloride in the gas phase process.Type: GrantFiled: February 25, 1976Date of Patent: January 2, 1979Assignee: United Technologies CorporationInventors: Robert S. Benden, Richard S. Parzuchowski
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Patent number: 4131714Abstract: Bonding compositions are disclosed as well as bondable articles utilizing such compositions. Such bonding compositions contain a crystalline polyester material and an amorphous polyester material and exhibit thermally stable bonding properties. Such bondable articles include bondable magnet wires comprising a conductor, an insulating base coat thereon and a bonding composition coated thereover containing a crystalline polyester material and an amorphous polyester material with the wires adapted to be shaped as coils and the like and thereafter bonded together with a bond which exhibits bond strength at elevated temperatures.Type: GrantFiled: December 22, 1975Date of Patent: December 26, 1978Assignee: Essex International, Inc.Inventors: Joseph Karkoski, Lionel J. Payette, John D. Shurboff
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Patent number: 4119560Abstract: An inert carrier process for drying radioactive waste material and for incorporating the dry material into a binder from which the dried material will not be leached is disclosed. In this process, a hot inert liquid carrier is provided into which the solution to be dried is introduced under extremely turbulent conditions. The solvent flashes off leaving the dried particles dispersed in the inert carrier which carries these particles to a mixing station where a binder for the particles is injected under turbulent conditions. The binder preferentially wets the particles and the coated particles are carried to a separator section where the binder coated particles coalesce and separate from the carrier as a second phase. Thereafter a curing agent can be added to the binder.Type: GrantFiled: March 28, 1977Date of Patent: October 10, 1978Assignee: United Technologies CorporationInventor: Randall D. Sheeline
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Patent number: 4112191Abstract: Lead paint can be extremely hazardous when ingested as a result of ionic lead, produced by the action of stomach acids, being subsequently absorbed into the blood stream. According to this invention, it has been found that certain metal salts of the dithiocarbamates of multifunctional amines are effective precipitants for lead ions. When ingested simultaneously with lead paint they precipitate the lead ion in a substantially insoluble and indigestible form and thereby prevent absorption of lead into the blood stream. The preferred compounds are: zinc pentaerythrityl tetrakis (dithiocarbamate), tetrasodium pentaerythrityl tetrakis (dithiocarbamate), disodium ethylene bis(dithiocarbamate), and zinc ethylene bis(dithiocarbamate). These materials can be included in a digestible coating which can be applied over lead based paints to effectively detoxify the lead paint.Type: GrantFiled: May 31, 1977Date of Patent: September 5, 1978Assignee: United Technologies CorporationInventor: William S. Anderson
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Patent number: 4078119Abstract: A porous conducting particle, hydrophobic bonded, substrate supported electrode is prewetted with the electrolyte. A D.C. voltage is applied to the electrode to assist in the prewetting with the electrolyte. A soluble catalyst-containing material is then introduced into the electrode structure and the catalyst deposited within the electrode. By appropriate selection of the porous conducting particles and the catalyst-applying techniques, precise control of the location of the catalyst can be obtained. If graphite materials are used as the conducting particles, a catalyst-containing salt is allowed to dissolve in the electrolyte in the prewetted electrode, and the catalyst-containing material is reduced to the metal. If the reduction is done by reaction with a reducing gas such as hydrogen, the catalyst will be deposited only in those regions of the electrode at which there is an electrolyte-reactant gas interface which is in electrical-conducting relationship with the substrate.Type: GrantFiled: May 17, 1976Date of Patent: March 7, 1978Assignee: United Technologies CorporationInventors: Murray Katz, Arthur Kaufman
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Patent number: 4075179Abstract: Polyesterimide polymers are provided as well as processes for preparing the same. Polyesterimide compositions are provided which can be applied as a magnet wire coating with the resulting magnet wire exhibiting excellent flexibility, heat shock, dielectric, and thermal properties. Such polyesterimide compositions can function as hot melt coating compositions for application as a magnet wire coating in a solventless process.Type: GrantFiled: December 24, 1975Date of Patent: February 21, 1978Assignee: Essex International, Inc.Inventors: Joseph Karkoski, Charles William McGregor, Lionel Joseph Payette
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Patent number: 4058213Abstract: A method for sterilizing solid particulate materials intended to be mixed with a liquid carrier prior to the parenteral or hypodermic introduction into the body of humans and animals. The predetermined amount of particulate material is placed in a sealable container, an amount of ethyl alcohol sufficient to produce a vapor concentration in said container which is toxic to any microorganisms in the particulate material, is added to the container and the container is sealed. When ready for use, the contents of the container may be mixed with sterile water for introduction into the body of humans and animals. This method is particularly useful with materials which tend to decompose when stored as a solution or when exposed to the conditions of normal sterilization procedures and a preferred embodiment involves the sterilization of fine crystalline sodium ascorbate.Type: GrantFiled: July 6, 1976Date of Patent: November 15, 1977Inventor: Irwin Stone
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Patent number: 4021267Abstract: Apparatus is disclosed which permits the use of a large proportion of the solar spectrum in the coversion of solar energy to electricity by means of photovoltaic cells. The apparatus comprises a collecting element which concentrates the incident radiation, a collimating element which forms the concentrated incident radiation into a beam of parallel photons, a spectral separation element, such as a prism, prism plate or diffraction grating which spectrally separates the solar radiation in the collimated beam and a plurality of photovoltaic cells disposed in the separated spectrum, the energy gap of the cells being matched to the energy of the photons in that portion of the spectrum in which the cells are located.Type: GrantFiled: September 8, 1975Date of Patent: May 3, 1977Assignee: United Technologies CorporationInventor: Joseph R. Dettling
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Patent number: 3999379Abstract: Thrust termination of a solid propellant rocket motor is obtained by connecting the nozzle to the combustion chamber pressure vessel by means of explosive and extrusable bolts. When it is desired to obtain thrust termination, the explosive bolts are blown leaving the nozzle connected to the pressure vessel by the extrusable bolts. The extrusable bolts have sufficient strength to retain the nozzle assembly; however, upon elimination of the strength of the explosive bolts, the nozzle is permitted to separate from the pressure vessel and move to the rear by drawing the extrusable bolts through dies. The bolts deform to absorb the energy of the nozzle and the jolt of forward acceleration which would normally be obtained if the nozzle were ejected, is reduced or eliminated.Type: GrantFiled: September 15, 1975Date of Patent: December 28, 1976Assignee: United Technologies CorporationInventor: Clarence A. LeFebvre
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Patent number: 3991239Abstract: Treating cured silicone rubber with bromine water etches the normally low energy surface of the silicone rubber to produce a high energy surface to which various curable polymeric systems may be directly bonded.Type: GrantFiled: March 27, 1975Date of Patent: November 9, 1976Assignee: United Technologies CorporationInventor: William S. Anderson
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Patent number: 3979225Abstract: A fuel cell is disclosed in which the cathode is a gaseous diffusion fuel cell electrode operating with an acid electrolyte and nitrogen dioxide (NO.sub.2) alone or with oxygen. The cathode half cell reaction produces nitric oxide (NO) and water and the NO.sub.2 is externally regenerated by reaction of NO with oxygen to produce the nitrogen dioxide for reuse in the cell. When both NO.sub.2 and oxygen are used, oxidation of the NO formed back to the NO.sub.2 occurs within the cathode itself so it is possible to get more than 100% utilization of the NO.sub.2 in the fuel cell.Type: GrantFiled: December 13, 1974Date of Patent: September 7, 1976Assignee: United Technologies CorporationInventors: Stanley W. Smith, Lawrence J. Bregoli