Patents by Inventor Lawrence W. Gosser

Lawrence W. Gosser 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: 5312957
    Abstract: The invention provides a process for enantioselective hydrocyanation of aromatic vinyl compounds which produces nonracemic mixtures of chiral, arylpropionitriles; novel carbohydrate phosphorus and nickel catalyst compositions; and optically pure (S)-(-)-2-(6-methoxy-2-naphthalene)propionitrile.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: May 17, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Albert L. Casalnuovo, Thaliyil V. Rajanbabu, Lawrence W. Gosser, Ronald J. McKinney, Nugent, Jr. William A.
  • Patent number: 5221621
    Abstract: A process or the production of glyoxylic acid involving the enzymatic oxidation of glycolic acid. The process provides a commercially practical method involving the reaction of glycolic acid in an aqueous solution at a starting concentration range of 200 mM to 2,500 mM in the presence of oxygen, glycolate oxidase and catalase at a pH of 7 to 10.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: June 22, 1993
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David L. Anton, Robert DiCosimo, Lawrence W. Gosser
  • Patent number: 5219745
    Abstract: A process for the production of glyoxylic acid involving the enzymatic oxidation of glycolic acid. The process provides a commercially practical method involving the reaction of glycolic acid in an aqueous solution at a starting concentration range of 200 mM to 2,500 mM in the presence of oxygen, glycolate oxidase and catalase at a pH of 7 to 10 and in the presence of an amine such as ethylenediamine, or tris(hydroxymethyl)-methylamine.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: June 15, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David L. Anton, Robert DiCosimo, Lawrence W. Gosser
  • Patent number: 5175335
    Abstract: The invention provides a process for enantioselective hydrocyanation of aromatic vinyl compounds which produces nonracemic mixtures of chiral, arylpropionitriles; novel carbohydrate phosphorus and nickel catalyst compositions; and optically pure (S)-(-)-2-(6-metehoxy-2-naphthalene)propionitrile.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: December 29, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Albert L. Casalnuovo, Thaliyil V. Rajanbabu, Lawrence W. Gosser, Ronald J. McKinney, William A. Nugent, Jr.
  • Patent number: 5135731
    Abstract: An improved process for directly producing hydrogen peroxide from oxygen and hydrogen is disclosed. Hydrogen and oxygen are contacted in the presence of a catalyst, acid, halide ions and a multifunctional phosphonate or phosphate preparation so as to increase hydrogen peroxide yield and decrease catalyst deactivation.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: August 4, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lawrence W. Gosser, Michael A. Paoli
  • Patent number: 5112702
    Abstract: This invention concerns improved processes for the synthesis of H.sub.2 O.sub.2 by means of the electrochemical reduction of oxygen in the presence of acid and halide, preferably bromide, conducted in an electrolytic cell or in the cathode compartment of a fuel cell. The processes described herein permit production of hydrogen peroxide in commercially useful concentrations.
    Type: Grant
    Filed: December 31, 1990
    Date of Patent: May 12, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Talvildis Berzins, Lawrence W. Gosser
  • Patent number: 4889705
    Abstract: A catalytic process for making H.sub.2 O.sub.2 from H.sub.2 and O.sub.2 in an aqueous medium which comprises using H.sup.+ ions and BR.sup.- ions each, independently, in the range from about 0.001 to about 0.05 M.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: December 26, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence W. Gosser
  • Patent number: 4832938
    Abstract: An improved method for making hydrogen peroxide from the direct combination of hydrogen and oxygen using a platinum/palladium catalyst in which the weight ratio of platinum to platinum plus palladium is in the range of about 0.02 to about 0.2.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: May 23, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lawrence W. Gosser, Jo-Ann T. Schwartz
  • Patent number: 4772458
    Abstract: A process for making hydrogen peroxide from hydrogen and oxygen employing an aqueous reaction medium containing a bromide promoter is disclosed.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: September 20, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lawrence W. Gosser, Jo-Ann T. Schwartz
  • Patent number: 4681751
    Abstract: A process for making hydrogen peroxide from hydrogen and oxygen at superatmospheric pressures employing, as catalyst, Pd on adsorbent carbon, the reaction being run in an aqueous medium comprising substantially no organic component.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: July 21, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence W. Gosser
  • Patent number: 4303632
    Abstract: Process comprising contacting and reacting a diarylmethanol having 13 to 25 carbon atoms and of the formula RCHOHR' wherein each of R and R' is aryl, the same or different, in the liquid state, at a temperature of about 130.degree.-260.degree. C., with gaseous oxygen to produce hydrogen peroxide and diaryl ketone of the formula RCOR' wherein R and R' are the same as above.
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: December 1, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence W. Gosser
  • Patent number: 4302435
    Abstract: Process comprising contacting and reacting a diarylketone of the formula RCOR', wherein each of R and R' is aryl, the same or different, and hydrogen over at least a catalytic amount of lead-poisoned palladium catalyst, for example, Lindlar catalyst, at a hydrogen gage pressure in the range from about 150 kPa to about 15,000 kPa, preferably from about 340 kPa to about 3400 kPa, at a temperature in the range from about 50.degree. C. to about 200.degree. C., preferably from about 100.degree. C. to about 150.degree. C., to produce diarylmethanol of the formula RCHOHR', wherein R and R' are as defined above.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: November 24, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence W. Gosser
  • Patent number: 4255343
    Abstract: Process for preparing 2-t-alkylanthracene, which process comprises contacting and reacting, with good mixing, at a temperature of at least 110.degree. C., anthracene and a branched-chain alkylating agent, the alkylating moiety of which contains at least four carbon atoms, in the presence of a catalyst selected from hydrocarbonsulfonic acids which are free of nonaromatic unsaturation, organic carboxylic acids having a K.sub.a of 0.6 to 0.001, acid zeolites, amorphous silica-aluminas, and polymeric arenesulfonic acid resins, to give a product mixture of which the major constituent is 2-t-alkylanthracene.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: March 10, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence W. Gosser
  • Patent number: 4131646
    Abstract: In a process for the manufacture of hydrogen peroxide wherein a compound containing the anthracene nucleus is hydrogenated to the corresponding 9,10-dihydroanthracene and the resulting 9,10-dihydroanthracene is oxidized to the corresponding 9-(or 10-) hydroperoxide; the step which comprises contacting the hydroperoxide thus produced with an acid catalyst to produce hydrogen peroxide and the starting compound containing the anthracene nucleus.
    Type: Grant
    Filed: September 16, 1977
    Date of Patent: December 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence W. Gosser
  • Patent number: 3966595
    Abstract: Reverse osmosis is employed to remove neutral ligands (usually phosphines, phosphites, stibines or arsines) from solutions of dissociable Group VIII metal complexes whereby a ligand-deficient reactive complex (which may be further reacted) is obtained. The products are useful as catalysts and as absorbants for carbon monoxide or acetylene.
    Type: Grant
    Filed: May 10, 1974
    Date of Patent: June 29, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence W. Gosser