Patents by Inventor Pius A. Wehrli

Pius A. Wehrli 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).

  • Explosive and propellant composition and method
    Patent number: 4997496
    Abstract: An explosive and propellant composition is obtained by admixing finely divided particles of ascorbic acid and a nitrate-containing oxidation agent, such as potassium nitrate. Admixing can be carried out in the dry state, at room temperature. The composition upon ignition gives off no sulfurous fumes, and leaves little or no carbon residue; and causes no corrosion with contacted metal surfaces.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: March 5, 1991
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Pius A. Wehrli
  • Conjugated diene derivatives
    Patent number: 4219660
    Abstract: There are disclosed herein derivatives of bisfunctionalized compounds, wherein said compounds have been formed by the introduction of a nitro group and a hydroxyl group in the form of an ester into a conjugated diene molecule by treatment of said conjugated dienes with nitric acid in the presence of a carboxylic acid anhydride. The novel compounds produced by this process are useful as bactericides, fungicides and valuable organic synthesis intermediates.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: August 26, 1980
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Pius A. Wehrli
  • Preparation of 2,3,6-tri-lower alkyl phenols
    Patent number: 4072723
    Abstract: Preparation of 2,3,6-tri-lower alkyl phenols from the condensation product of an .alpha.,.beta.-unsaturated aldehyde with a dilower alkyl ketone.
    Type: Grant
    Filed: August 28, 1974
    Date of Patent: February 7, 1978
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Pius A. Wehrli