Patents by Inventor Marilyn H. Bromels

Marilyn H. Bromels 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).

  • Macrocyclic hetero imine complexing agents
    Patent number: 4031111
    Abstract: Macrocyclic imines useful as complexing agents for ionic metal compounds characterized by a macrocyclic ring or rings of carbon and hetero-atoms totaling 14-60 ring atoms, at least one hetero-atom being nitrogen and the remainder being oxygen, each hetero-atom in the ring being separated from adjoining hetero-atoms by links of 2 or 3 carbon atoms. The macrocyclic ring or rings are fused to 1-4 carbocyclic rings. The macrocyclic rings or substituted derivatives of them can be monocyclic, bicyclic, or bridged by a carbon, or carbon-hetero-atom chain.
    Type: Grant
    Filed: September 6, 1974
    Date of Patent: June 21, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles John Pedersen, Marilyn H. Bromels