Patents by Inventor Howland A. Larsen

Howland A. Larsen 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).

  • Preparation of salt solution useful for making nylon
    Patent number: 4442260
    Abstract: A process is described for making highly concentrated solutions of nylon salt in which the diamine is added in two portions, one before and one after a step in which water is evaporated from a solution of maximum solubility.
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: April 10, 1984
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Howland A. Larsen