Patents by Inventor Malcolm Ronald Hadler

Malcolm Ronald Hadler 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).

  • 4-Hydroxycoumarin compounds useful as anticoagulant rodenticides
    Patent number: 4035505
    Abstract: Novel 4-hydroxy coumarins substituted in the 3 position with substituted tetrahydronaphthyl groups are described. A method of making them by condensing 4-hydroxy coumarin with hydroxyl or halogeno derivatives of the substituted tetrahydronaphthalenes is described. The compounds of the invention are potent anticoagulants finding typical uses as rodenticides. As rodenticides they are particularly effective against rodents resistant to such agents as Warfarin, Coumatetralyl, Diphacinone and Pival.
    Type: Grant
    Filed: January 20, 1976
    Date of Patent: July 12, 1977
    Assignee: Ward Blenkinsop and Company Limited
    Inventors: Malcolm Ronald Hadler, Roy Stanley Shadbolt, deceased
  • 4-Hydroxycoumarins
    Patent number: 3957824
    Abstract: Novel 4-hydroxy coumarins substituted in the 3 position with substituted tetrahydronaphthyl groups are described. A method of making them by condensing 4-hydroxy coumarin with hydroxyl or halogeno derivatives of the substituted tetrahydronaphthalenes is described. The compounds of the invention are potent anticoagulants finding typical uses as rodenticides. As rodenticides they are particularly effective against rodents resistant to such agents as Warfarin, Coumatetralyl, Diphacinone and Pival.
    Type: Grant
    Filed: May 22, 1974
    Date of Patent: May 18, 1976
    Assignee: Ward Blenkinsop and Company Limited
    Inventors: Malcolm Ronald Hadler, Roy Stanley Shadbolt