Patents by Inventor Shih-En Hu

Shih-En Hu 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).

  • Imine derivatives of alkylated aryl compounds
    Patent number: 3937731
    Abstract: Disclosed are Schiff base derivatives of acylated aromatic hydrocarbons useful as oil soluble additives having pour point depressing and sludge dispersing properties.
    Type: Grant
    Filed: January 14, 1972
    Date of Patent: February 10, 1976
    Assignee: Exxon Research & Engineering Co.
    Inventors: William C. Hollyday, Shih-En Hu
  • Nitrogen-containing dispersant from polyolefin
    Patent number: 3931024
    Abstract: A multifunctional additive for an oil from the class consisting of gasoline, middle distillate fuels, and lubricating oils is prepared by the reaction of an aliphatic polyamine such as diethylene triamine, tetraethylene pentamine, and the like with the product that is obtained by the noncatalyzed air oxidation of a polyolefin or a halogenated polyolefin such as polyisobutylene or chlorinated polyisobutylene.
    Type: Grant
    Filed: June 8, 1972
    Date of Patent: January 6, 1976
    Assignee: Exxon Research and Engineering Company
    Inventor: Shih-En Hu