Patents by Inventor Oswald Helmling

Oswald Helmling 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).

  • Composition capable of releasing acrolein and its use
    Patent number: 5723498
    Abstract: A composition which is capable of releasing acrolein and is easy to handle contains (i) an acetal of acrolein with a C.sub.1-6 alcohol with 1 to 4 hydroxyl groups and (ii) an acid soluble therein and chemically compatible with a pK.sub.s value of less than 4 and (iii) is anhydrous. A preferred composition contains 2-vinyl-1,3-dioxolane as acetal, anhydrous oxalic acid, fumaric acid or maleic acid or a mixture of mono- and di(C.sub.1 - to C.sub.3 -)alkyl phosphate as acid and, in addition, a non-ionic surfactant. The acrolein is released at the site of use upon contact with for example water for the purpose of combatting microbial, vegetable and animal pests.
    Type: Grant
    Filed: September 13, 1995
    Date of Patent: March 3, 1998
    Assignee: Degussa Aktiengellschaft
    Inventors: Peter Werle, Martin Trageser, Oswald Helmling, Harold Jakob
  • Method and composition for combatting microbial, vegetable and animal pests with acrolein
    Patent number: 5696052
    Abstract: The direct handling of acrolein for the purpose of combatting microbial, vegetable and animal pests in water and soil is problematic on account of the potential for danger of acrolein. According to the invention a composition which releases acrolein upon contact with water at the site of use and is easy to handle is used.The composition in accordance with the invention contains an acrolein acetal, preferably 2-vinyl-1,3-dioxolane, and a compound hydrolyzable to an acid with a pK.sub.s value of less than 4, especially one from the series of organic acid anhydrides, organic acid halides and inorganic halogen compounds forming hydrogen halide upon hydrolysis.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 9, 1997
    Assignee: Degussa Aktiengesellschaft
    Inventors: Peter Werle, Martin Trageser, Oswald Helmling, Harald Jakob
  • Process for bleaching and delignification of lignocellulosic materials
    Patent number: 5246543
    Abstract: Delignification and bleaching of lignocellulosic material is enhanced after the pulp has been treated with peroxomonosulfuric acid.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: September 21, 1993
    Assignee: Degussa Corporation
    Inventors: Juergen Meier, Gerhard Arnold, Oswald Helmling
  • Method for the denitration of waste gases with obtention of HNO.sub.3
    Patent number: 5112587
    Abstract: A method for the removal of nitrogen oxides from waste gases and for obtaining nitric acid is described. The waste gas is charged with the required amount of hydrogen peroxide, converted into the gas phase, and the gas mixture is reacted on a solid catalyst to hydrogen nitrate, which is either withdrawn for further use or is converted into nitric acid either by condensation or by scrubbing with water. The method permits the removal of NO.sub.x at low concentrations below 2000 ppm with efficiencies above 90%.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: May 12, 1992
    Assignee: Degussa AG
    Inventors: Wedigo von Wedel, Elke Senff, Oswald Helmling
  • Chemical-mechanical treatment of lignocellulosics to improve nutritive value
    Patent number: 4965086
    Abstract: A method is disclosed for treating a lignocellulosic substrate in order to imrpove its nutritive value wherein a plant substrate is treated with a sufficient amount of an alkaline material and hydrogen peroxide, or a compound capable of generating hydrogen peroxide, for a sufficient period of time and the reaction mass is extruded to produce a product having increased nutrient availability.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: October 23, 1990
    Assignee: Degussa Aktiengesellschaft
    Inventors: Oswald Helmling, G. Arnold, H. Rzehak, George C. Fahey, Jr., Larry L. Berger, Neal R. Merchen, John Medina, Rudi Moerck