Patents by Inventor Daryl L. Stein

Daryl L. Stein 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).

  • Halogen substituted phthalimide flame retardants
    Patent number: 4999391
    Abstract: Novel halogen-substituted phthalimides are provided which are the reaction product of a halogenated phthalic anhydride with an alkoxylated amine or the reaction product of a halogenated phthalic anhydride with a siloxy amine. The halogen-substituted phthalimides are useful in increasing the flame retardancy of thermoplastic and thermosetting resins, and are also effective as processing aids in improving the flowability and moldability of thermoplastic resins during melt processing.
    Type: Grant
    Filed: December 15, 1989
    Date of Patent: March 12, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Joseph M. Bohen, Gerald H. Reifenberg, Daryl L. Stein
  • Halogen substituted phthalimide flame retardants
    Patent number: 4904795
    Abstract: Novel halogen-substituted phthalimides are provided which are the reaction product of a halogenated phthalic anhydride with an alkoxylated amine or the reaction product of a halogenated phthalic anhydride with a siloxy amine. The halogen-substituted phthalimides are useful in increasing the flame retardancy of thermoplastic and thermosetting resins, and are also effective as processing aids in improving the flowability and moldability of thermoplastic resins during melt processing.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: February 27, 1990
    Assignee: Pennwalt Corporation
    Inventors: Joseph M. Bohen, Gerald H. Reifenberg, Daryl L. Stein