Patents Examined by Deborah L. Kyle
  • Patent number: 5361240
    Abstract: A pressure compensated hydrophone assembly consists of a hollow mandrel that has an outer surface. The central portion of the outer surface of the mandrel defines a concavity. A flexible, resilient piezoelectric film is wrapped several times around the mandrel. The volume between the inner wrap of the film and the concavity on the outer surface of the mandrel serves as a pressure compensation chamber. The hydrophone is responsive to varying hydrodynamic pressure fields but is substantially inert to acceleration forces, localized impacts and variations in hydrostatic pressure.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: November 1, 1994
    Assignee: Innovative Transducers Inc.
    Inventor: Richard E. Pearce
  • Patent number: 5238606
    Abstract: The invention relates to the use of certain styrenated diphenylamine and hindered phenol compositions for the stabilization of polyether polyols.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: August 24, 1993
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Bruce W. Downs, Paul E. Stott, Lawrence B. Barry, Mark C. Richardson
  • Patent number: 5175394
    Abstract: The sabot bullet has a rearwardly tapered front part and a forwardly tapered rear part converging toward each other and spaced from each other by an integral connecting part. The sabot for the bullet has two mating segments each having complementary shaped tapered front and rear cavity parts converging toward an integral interconnecting part. Each segment has a transverse flat disk portion at the rear of the rear part. The segments form an integral, transverse circular disk which abutts the rear end face of the projectile when the sabot segments are joined about the bullet.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: December 29, 1992
    Assignee: Olin Corporation
    Inventor: Robert P. Sowash
  • Patent number: 5174922
    Abstract: The invention provides a process of reducing the copper corrosiveness of dihydrocarbyl polysulfides by treating them with an alkali metal-containing or alkaline earth metal-containing substance capable of dissolving elemental sulfur (e.g., sodium hydroxide, sodium sulfide, etc.). The process is conducted in a liquid reaction medium composed of a mixture of water and at least one water-soluble alcohol. Experiments have shown that it is possible by use of this process to reduce the copper corrosiveness to a level below that exhibited by a product formed by treating the same initial dihydrocarbyl polysulfide in the same way but in a liquid medium composed solely of water.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: December 29, 1992
    Assignee: Ethyl Petroleum Additives, Inc.
    Inventors: Edmund F. Perozzi, Andrew G. Papay
  • Patent number: 5162568
    Abstract: A process for nitrating alkanols containing 5-13 carbon atoms is disclosed. The nitation takes place at 15.degree.-45.degree. C. using a mixed acid containing 20-30% nitric acid, 55-60% sulfuric acid and 15-20% water, and 2-5%, based on mixed acid, of a stabilizer selected from the class consisting of urea, sulfamic acid and hydrazine.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: November 10, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Charles F. Douty
  • Patent number: 5158693
    Abstract: Quartenized derivatives of oligoquinoline have been reacted with refractory metal oxysalts to generate oligoquinolinium metal oxide salts which provide excellent corrosion inhibition of iron based alloy articles in sulfur containing media.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: October 27, 1992
    Assignee: Exxon Research and Engineering Co.
    Inventors: Trikur A. Ramanarayanan, Long Y. Chiang
  • Patent number: 5156768
    Abstract: R12, which contains chlorine, and hydrogen-contributing lubricants react to form acids such as hydrogen chloride and hydrogen fluoride and simultaneously, R12 is converted to R22. Such reactions are undesirable because the acids which form destroy the metallic components of a refrigeration system and cause the breakdown of the lubricants.The present invention provides a compositions for use in compression refrigeration and air-conditioning which substantially reduce the occurrence of the foregoing problem.
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: October 20, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Raymond H. P. Thomas, Ruth H. Chen, Kenneth Harris
  • Patent number: 5156769
    Abstract: A composition which is useful for inhibiting the corrosion of copper and copper alloy metals in contact with an aqueous system is disclosed. The composition comprises phenyl mercaptotetrazole and tolytriazole and/or benzotriazole.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: October 20, 1992
    Assignee: Calgon Corporation
    Inventors: Charles Y. Cha, Daniel P. Vanderpool
  • Patent number: 5151220
    Abstract: A method of inhibiting carbonate stress corrosion cracking is determined to involve the addition of certain treatment chemicals to refinery process streams containing at least 1 of the volatile chemicals, ammonia, carbon dioxide, hydrogen sulfide, hydrogen cyanide, and water. The treatment chemical is preferably a fatty imidazoline compound or fatty amides or fatty esters or mixtures thereof.The imidazoline compounds and the amide/esters are formed by reacting tall oil fatty acids, naphthenic acids, or mixtures thereof with essentially linear heterochemicals containing amine or alcohol functionality.
    Type: Grant
    Filed: August 7, 1990
    Date of Patent: September 29, 1992
    Assignee: Nalco Chemical Company
    Inventors: Veronica K. Majestic, Russell C. Strong
  • Patent number: 5149459
    Abstract: A process for removal of H.sub.2 S from gas streams is described, the process being characterized by use of a novel iron chelate treating solution containing a specified ferric to ferrous chelate ratio and aqueous ammonia.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: September 22, 1992
    Assignee: Shell Oil Company
    Inventors: Donald C. Olson, John J. Miller, deceased, Wayne R. Miller, executor
  • Patent number: 5149460
    Abstract: A process for removal of H.sub.2 S from gas streams is described, the process being characterized by use of a novel iron chelate treating solution containing a specified ferric to ferrous chelate ratio, aqueous ammonia, and thiosulfate ion.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: September 22, 1992
    Assignee: Shell Oil Company
    Inventors: Donald C. Olson, John J. Miller, deceased, Wayne R. Miller, executor, George C. Blytas, Zaida Diaz
  • Patent number: 5147579
    Abstract: The present invention provides free flowing and moisture resistant compositions from normally hygroscopic compositions by a process of mixing the hygroscopic material with a sealing material and heat treating. By controlling the sealing material added, the heat treatment time, and the heat treatment temperature, the sealing material forms a glassy coating on the hygroscopic material that is impervious to moisture while retaining free-flow properties. The present invention particularly provides free-flowing and moisture resistant sodium titanate and potassium titanate compositions having a moisture pick-up =< about 0.5 wt. % by a process of mixing sodium titanate or potassium titanate with a sealing material and heat treating the mixture.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: September 15, 1992
    Assignee: Tam Ceramics, Inc.
    Inventor: Terence C. Dean
  • Patent number: 5141675
    Abstract: A polyphosphate in combination with an azole such as in alkyl or alkoxy benzotriazole, mercaptobenzothiazole, tolyltriazole, benzotriazole, a substituted benzotriazole and/or 1-phenyl-5-mercaptotetrazole, is used to inhibit the corrosion of metallic surfaces, particularly copper surfaces, in contact with an aqueous system. Systems and compositions are also claimed.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: August 25, 1992
    Assignee: Calgon Corporation
    Inventors: Daniel P. Vanderpool, Susan P. Rey
  • Patent number: 5139701
    Abstract: A composition and method for controlling corrosion of steel in aqueous systems such as cooling and boiler systems. The combination of a nonionic surfactant and an anionic oxygen containing group such as one or more alkali metal salts of borate, molybdate and nitrate/nitrite provide improved corrosion inhibition of steel in aqueous systems. The magnetite layers formed in the presence of this combination exhibit decreased porosity and increased corrosion resistance to acidic solutions. This combination also inhibits entry of hydrogen into steel when exposed to acidic solutions thereby inhibiting hydrogen embrittlement. The preferred nonionic surfactant is phenol/polyethylene oxide nonionic surfactant and the preferred alkali metal salt is Na.sub.2 MoO.sub.4.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: August 18, 1992
    Assignee: Betz Laboratories, Inc.
    Inventor: Alexander C. McDonald
  • Patent number: 5139702
    Abstract: A composition useful for treating aqueous systems comprising a naphthylamine polycarboxylic acid having the formula: ##STR1## wherein X is CO.sub.2 H or SO.sub.3 H, Y is H, C.sub.1 to C.sub.6 alkyl, CO.sub.2 H or SO.sub.3 H, R is H, C.sub.1 to C.sub.6 alkyl, CO.sub.2 R' or COR', R' is C.sub.1 to C.sub.6 alkyl, n is an integer from 1 to 20, and water soluble salts thereof.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: August 18, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Charles G. Carter, Robert P. Kreh, Lai-Duien G. Fan
  • Patent number: 5139700
    Abstract: A vapor phase corrosion inhibitor formulation comprising a finely divided anhydrous molybdate selected from the group consisting of anhydrous sodium molybdate, anhydrous ammonium dimolybdate, and anhydrous amine molybdates having the structural formula: ##STR1## wherein R.sub.1 is an aliphatic hydrocarbon having up to 7 carbon atoms, and wherein R.sub.2 is either hydrogen or an aliphatic hydrocarbon having up to 7 carbon atoms with these anhydrous molybdates being provided in admixtures with sodium nitrite and benzotriazole. The formulations of the present invention have been found to be particularly desirable as a vapor phase corrosion inhibitor when in contact with the environs of metals susceptible to corrosion including, for example, iron, steel, copper, and alloys such as alloys of iron, copper, and the like. In a preferred embodiment, the amine-molybdate compounds are those amine-molybdates derived from dicyclohexylamine, 2-ethylhexylamine, and cyclohexylamine.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: August 18, 1992
    Assignee: Cortec Corporation
    Inventors: Boris A. Miksic, Michael Tarvin
  • Patent number: 5137657
    Abstract: An orthophosphate salt and sodium silicate, when used in a 3:1 ratio by weight, and in a concentration of 0.1 to 100 mg/L, are found to have a synergistic effect in controlling the corrosion of carbon steel in an aqueous system, e.g., a municipal water supply system. The synergistic combination is also useful in reducing lead solubility and leaching, and in stabilizing soluble iron and manganese and their reaction products.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: August 11, 1992
    Assignee: Merck & Co., Inc.
    Inventor: Bennett P. Boffardi
  • Patent number: 5135681
    Abstract: A method is disclosed for inhibiting corrosion of a ferrous based metal in contact with an aqueous system comprising incorporating into the aqueous system an effective amount of a substituted carboxymethoxysuccinic acid selected from the group consisting of compounds having the formula: ##STR1## wherein R is --(CHOH).sub.n CH.sub.2 OH, --(CHOH).sub.m CO.sub.2 H or --(CHOH).sub.r (CHOR')CO.sub.2 H and R' is CH(CO.sub.2 H)CH.sub.2 CO.sub.2 H; n is 1,2,3 or 4; m is 1,2,3, or 4; r is 1,2, or 3; and water soluble salts thereof.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: August 4, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Charles G. Carter, Vladimir Jovancicevic
  • Patent number: 5133899
    Abstract: Disclosed to a stabilizer composition for a chlorine-containing polymer, which comprises a zeolite type stabilizer; calcium hydroxide or magnesium hydroxide, a metal soap type stabilizer and perchloric acid as indispensable components.The stabilizer composition is obtained by adding a metal soap type stabilizer to a mixture of a zeolite type stabilizer and calcium hydroxide or magnesium hydroxide under attrition to cover the mixture with the metal soap type stabIlizer at a high efficiency, and adding perchloric acid to the covered mixture.In the stabilizer composition of the present invention, the initial discoloration, which is a fatal defect of the conventional zeolite type stabilizer for a chlorine-containing polymer, can be prevented, and a sufficient hydrogen chloride-capturing capacity is exerted and a high heat stability is attained without occurrence of bleeding.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: July 28, 1992
    Assignee: Mizusawa Industrial Chemicals, Ltd.
    Inventors: Tadahisa Nakazawa, Masahide Ogawa, Shoji Shoji, Seizi Wakaki, Choichi Abe
  • Patent number: 5133900
    Abstract: A composition which is thermooxidatively stable is provided which comprises a normally thermooxidatively unstable organic compound and effective amount of a thermooxidative stabilizing composition comprising an oil soluble sulfonate of a metal selected from barium, calcium, magnesium, zinc or a mixture of any of the foregoing; an effective amount of a stabilizer comprising an alkali or alkaline earth metal or zinc soap of an alkyl or alkenyl succinic acid, a partial ester thereof or a mixture of the foregoing; an effective amount of at least one primary antioxidant; optionally an effective amount of a secondary antioxidant; and optionally a carrier for the thermooxidative stabilizing composition. A thermooxidative stabilizing composition and a method for stabilizing a normally unstable organic compound comprising the addition of an effective amount of the thermooxidative stabilizing composition are provided as well.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: July 28, 1992
    Assignee: King Industries, Inc.
    Inventors: Lawrence V. Gallacher, Alfen J. Gustavsen, Robert L. Kugel