Patents by Inventor Ajay RYERSON

Ajay RYERSON 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).

  • Methods for preparing levorphanol and related compounds, and compositions thereof
    Patent number: 10851063
    Abstract: A method for producing substantially pure levorphanol and related compounds, when compared to the conventional process, is provided. In particular, a method for producing substantially pure levorphanol tartrate dihydrate is described. Also described are compositions comprising levorphanol and related compounds, particularly compositions comprising levorphanol tartrate dihydrate, levomethorphan, and norlevorphanol in which the levomethorphan and norlevorphanol are present in the composition in reduced levels.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: December 1, 2020
    Assignee: AMPAC FINE CHEMICALS LLC
    Inventors: William Dubay, Alex Nichols, Wei Chen, Alec Brozell, Ajay Ryerson
  • METHODS FOR PREPARING LEVORPHANOL AND RELATED COMPOUNDS, AND COMPOSITIONS THEREOF
    Publication number: 20200109119
    Abstract: A method for producing substantially pure levorphanol and related compounds, when compared to the conventional process, is provided. In particular, a method for producing substantially pure levorphanol tartrate dihydrate is described. Also described are compositions comprising levorphanol and related compounds, particularly compositions comprising levorphanol tartrate dihydrate, levomethorphan, and norlevorphanol in which the levomethorphan and norlevorphanol are present in the composition in reduced levels.
    Type: Application
    Filed: October 4, 2018
    Publication date: April 9, 2020
    Inventors: William DUBAY, Alex NICHOLS, Wei CHEN, Alec BROZELL, Ajay RYERSON