Patents Represented by Attorney A. C. Ancona
  • Patent number: 4885150
    Abstract: The present invention is a composition comprising (a) thiocyanogen or a thiocyanogen halide and (b) an .alpha.,.beta.-unsaturated ketone, e.g. chloranil, in solution in (c) an inert organic solvent. The composition is useful for the introduction of thiocyanate functionality into organic compounds in the same manner as thiocyanogen or thiocyanogen chloride, but is stable over longer periods of time, i.e. one year or more.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: December 5, 1989
    Assignee: The Dow Chemical Company
    Inventor: Steven L. Brewster
  • Patent number: 4680396
    Abstract: It has now been found that certain phosphonate derivatives of bis(aminoalkyl) piperazines are good threshold agents to prevent metal ion precipitation in aqueous solutions. They also function as sequestering and/or chelating agents as do those which do not contain the phosphonate group.
    Type: Grant
    Filed: February 24, 1984
    Date of Patent: July 14, 1987
    Assignee: The Dow Chemical Company
    Inventors: Druce K. Crump, Jaime Simon, David A. Wilson
  • Patent number: 4647210
    Abstract: For measurement of chlorine concentration in a process stream, an improved device is set forth measuring light transmission in a selected frequency range. The preferred embodiment uses a light source, a light filter and an optical fiber extending to a pipe or other vessel with flowing chlorine. The light is transmitted from a lens system to another lens system and into a second optical fiber. The second fiber extends to a measuring device.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: March 3, 1987
    Assignee: The Dow Chemical Company
    Inventors: Thomas E. Morris, Tarver G. Snedecor, Jr.
  • Patent number: 4614646
    Abstract: An aqueous composition containing hydrogen peroxide, or a precursor which will form said peroxide in aqueous solution, is inhibited from decomposition in the presence of small amounts of copper, iron, manganese or other transition metal ions and in the presence of significant amounts of alkaline earth metal ions, e.g. Ca or Mg, by the presence of a combination of inhibitors one being from the group consisting of alkyleneaminephosphonic acids and the other being from the group consisting of polyalkylenepolycarboxylic acids and their analogous amides and sulfonic acid derivatives.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: September 30, 1986
    Assignee: The Dow Chemical Company
    Inventor: Steven H. Christiansen
  • Patent number: 4606907
    Abstract: New stable complexing agents for radionuclides which are phosphonate derivatives of certain polyamidoamines have been found which are useful in imaging the skeletal system in animals. Even though the complexing agents have high molecular weights the complexes clear rapidly and very efficiently through the kidneys, with large amounts being taken up in the bone. The ratio of uptake in bone to that in surrounding soft tissue is high even at relatively short times after injection.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: August 19, 1986
    Assignee: The Dow Chemical Company
    Inventors: Jaime Simon, Wynn A. Volkert, David A. Wilson
  • Patent number: 4605801
    Abstract: The process is an improvement over the chlorination of EDC in a boiling bed. The reactants, chlorine and dichloroethane (either 1,1- or 1,2-) are mixed in the vapor phase and passed over a molecular sieve which serves as a catalyst to produce 1,1,2-trichloroethane.
    Type: Grant
    Filed: October 29, 1982
    Date of Patent: August 12, 1986
    Assignee: The Dow Chemical Company
    Inventors: Roger L. Juhl, Mark S. Johnson, Thomas E. Morris
  • Patent number: 4602110
    Abstract: A method of purifying 3-chloro-2-hydroxypropyl trialkylammonium chloride. An aqueous slurry is prepared containing about 70-98 wt. % total solids including the chloride and impurities associated with the preparation thereof. To this slurry is then added a miscible alcohol having about 3-4 carbon atoms. A solid filtrate is collected and optionally washed with additional alcohol and dried. The solid filtrate is substantially more pure in the chloride than the starting material.
    Type: Grant
    Filed: May 15, 1985
    Date of Patent: July 22, 1986
    Assignee: The Dow Chemical Company
    Inventor: Emmett L. Tasset
  • Patent number: 4597890
    Abstract: Stable methylchloroform solvent compositions in combination with from about 3 to about 5 volume percent of 2-butanol and from about 1 to about 3 volume percent of 3-methyl-1-butyn-3-ol have been shown to be superior solvents for removing flux from circuit boards. Such compositions have no flash point and maintain excellent distribution of the components in the vapor and liquid sections of the defluxing apparatus.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: July 1, 1986
    Assignee: The Dow Chemical Company
    Inventors: Susan M. Dallessandro, Wesley L. Archer, Stephen P. Krupp
  • Patent number: 4582698
    Abstract: The imaging of cardiac infarcts with complexed radioactive metals is improved by employing as the complexing agent a compound of the formula ##STR1## wherein substituents A, B, X and Y are each independently selected from radicals including hydrogen, hydroxyalkyl (wherein the alkyl group contains 2-6 carbon atoms), methylenephosphonic, methylene-, ethylene-, and propylenesulfonic, carboxylic acid radicals (having 2-4 carbon atoms) and the alkali or alkaline earth metal, ammonia and amine salts thereof and wherein at least one A, B, X and Y is methylenephosphonic acid or a salt thereof. In particular Tc-99m complexes have been found useful for imaging damaged cardiac tissue.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: April 15, 1986
    Assignee: The Dow Chemical Company
    Inventors: Jaime Simon, David A. Wilson, Wynn A. Volkert
  • Patent number: 4575454
    Abstract: New compounds have been prepared from dicyclopentadiene bis(methylamine) which have the following formula ##STR1## wherein substituents A, B, X and Y each are independently selected from radicals including hydrogen, hydroxyalkyl (wherein the alkyl group contains 2-6 carbon atoms) phosphonic, sulfonic, hydroxyethyl- and hydroxypropylsulfonic, methylenephosphonic methylene-, ethylene- and propylenesulfonic, alkylcarboxylic acid radicals (having 2-4 carbon atoms) and the alkali or alkaline earth metal, ammonia and amine salts of any of the phosphonic, sulfonic or carboxylic acid derivatives. At least one of the substituents must be other than a hydrogen. These compounds are useful chelating agents and those containing the methylenephosphonic substituents are good threshold agents.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: March 11, 1986
    Assignee: The Dow Chemical Company
    Inventor: David A. Wilson
  • Patent number: 4575494
    Abstract: An alumina support which contains cesium is prepared by adding a fusible compound of cesium to alumina along with known binders and porosity control agents. The cesium compound should be fusible below the temperature at which the alumina fuses. Such a support is especially useful as a support for a silver catalyst employed in the oxidation of ethylene to ethylene oxide.
    Type: Grant
    Filed: February 8, 1984
    Date of Patent: March 11, 1986
    Assignee: The Dow Chemical Company
    Inventors: Harold W. Young, Jr., Oliver C. Ainsworth, Jr., William E. Fry, Lawrence E. Neil
  • Patent number: 4568468
    Abstract: A process of preventing precipitation of scale producing metal ions, e.g. calcium, from their aqueous solutions by adding an effective amount of a methylenephosphonic acid derivative of bis(methylamine)-norbornane. These compounds are effective in threshold amounts.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: February 4, 1986
    Assignee: The Dow Chemical Company
    Inventors: Jaime Simon, Druce K. Crump, David A. Wilson
  • Patent number: 4560548
    Abstract: Radionuclide complexes of phosphonate derivatives of bis(aminoalkyl)piperazine have been found which are useful for imaging and/or treating therapeutically the skeletal system to detect and treat bone tumors. These complexes clear readily through the kidneys and the ratio of uptake in bone to that in surrounding soft tissue is high.
    Type: Grant
    Filed: April 10, 1984
    Date of Patent: December 24, 1985
    Assignee: The Dow Chemical Company
    Inventors: Jaime Simon, David A. Wilson, Wynn A. Volkert, Druce K. Crump
  • Patent number: 4559110
    Abstract: Distillation of the heavy waste stream from the manufacture of phenol via the cumene process provides an overhead stream containing phenol, acetophenone and 2-phenyl propionaldehyde. Extraction of the overhead stream with aqueous caustic removes the phenol and subsequent distillation of the remaining two components in the presence of a catalytic amount of caustic provides a substantially pure acetophenone distillate.
    Type: Grant
    Filed: July 11, 1983
    Date of Patent: December 17, 1985
    Assignee: The Dow Chemical Company
    Inventors: Loren L. Swearingen, Alfred W. Heinsohn, Craig W. Snook, Wallace E. Embrey, Garnet E. McConchie
  • Patent number: 4533653
    Abstract: An improved process of making an oxidation catalyst containing vanadium, tin, potassium and a silicate binder which comprises employing a porosity control agent and calcination conditions to produce a catalyst having a mean pore diameter in the range of 5-15.mu. and at least 90% of the pores having diameters <10.mu..
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: August 6, 1985
    Assignee: The Dow Chemical Company
    Inventors: Nobuyuki Ishibe, Renard L. Thomas, Emmett L. Tasset
  • Patent number: 4524011
    Abstract: Superior solder flux, e.g., rosin flux, removal compositions are disclosed which have no flash point and are substantially non-corrosive toward aluminum. These compositions consist of about 0.5 to less than 2% methanol with about 3 to 10% of one or more alcohols containing 2-5 carbon atoms the balance being an inhibited 1,1,1-trichloroethane, wherein percentages are based on volume of the total composition.
    Type: Grant
    Filed: November 4, 1983
    Date of Patent: June 18, 1985
    Assignee: The Dow Chemical Company
    Inventors: Emmett L. Tasset, Susan M. Dallessandro, Warren F. Richey
  • Patent number: 4518777
    Abstract: Certain methylene phosphonic acid derivatives of aminohydrocarbyl piperazine-urea adducts are good threshold agents to prevent metal ion precipitation in aqueous solutions.
    Type: Grant
    Filed: September 2, 1983
    Date of Patent: May 21, 1985
    Assignee: The Dow Chemical Company
    Inventors: Druce K. Crump, David A. Wilson
  • Patent number: 4515767
    Abstract: Complexes of radionuclides with a compound of the formula ##STR1## wherein substituents A, B, X and Y are each independently selected from radicals including hydrogen, hydroxyalkyl (wherein the alkyl group contains 2-6 carbon atoms) phosphonic, sulfonic, methylenephosphonic, methylene-, ethylene- and propylene-sulfonic, carboxylic acid radicals (having 2-4 carbon atoms) and the alkali or alkaline earth metal, ammonia and amine salts, thereof and wherein at least one A, B, X and Y is methylenephosphonic acid or a salt thereof. Tc-99m complexes have been found useful for imaging the skeletal structure of animals.
    Type: Grant
    Filed: June 20, 1983
    Date of Patent: May 7, 1985
    Assignee: The Dow Chemical Company
    Inventors: Jaime Simon, David A. Wilson, Wynn A. Volkert
  • Patent number: 4514380
    Abstract: An improved process for making tetrarhodium dodecacarbonyl, Rh.sub.4 (CO).sub.12, reacts RhCl.sub.3.xH.sub.2 O with CO under about 200 psig (14.06 kg/cm.sup.2) at a temperature of about 50.degree. C. in the presence of copper metal and an alkali metal halide, e.g. NaCl. The product mixture is contacted with a chlorinated solvent, e.g. CH.sub.2 Cl.sub.2, which dissolves the desired product and is subsequently recovered by evaporating the solvent.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: April 30, 1985
    Assignee: The Dow Chemical Company
    Inventor: Douglas L. Hunter
  • Patent number: 4508704
    Abstract: New stable complexing agents for Tc-99m which are phosphonate derivatives of bicycloheptane bis(alkylamines) have been found which are useful in imaging the skeletal system in animals. The complexes readily clear through the kidneys with large amounts being taken up in the bone. The ratio of uptake in bone to that in soft tissue is high.
    Type: Grant
    Filed: February 27, 1984
    Date of Patent: April 2, 1985
    Assignee: The Dow Chemical Company
    Inventors: Jaime Simon, David A. Wilson, Wynn A. Volkert