Patents by Inventor Stephen F. Hahn

Stephen F. Hahn 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).

  • Process for hydrogenating aromatic polymers
    Patent number: 5654253
    Abstract: The present invention is a process of hydrogenating high molecular weight aromatic polymers comprising hydrogenating the high molecular weight aromatic polymer in the presence of a silica supported metal hydrogenation catalyst, characterized in that the silica has a pore size distribution such that at least 98 percent of the pore volume is defined by pores having diameter of greater than 600 angstroms.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: August 5, 1997
    Assignee: The Dow Chemical Company
    Inventors: Dennis A. Hucul, Stephen F. Hahn
  • Process for hydrogenating aromatic polymers
    Patent number: 5612422
    Abstract: The present invention is a process of hydrogenating high molecular weight aromatic polymers comprising hydrogenating the high molecular weight aromatic polymer in the presence of a silica supported metal hydrogenation catalyst, characterized in that the silica has a pore size distribution such that at least 98 percent of the pore volume is defined by pores having diameter of greater than 600 angstroms.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: March 18, 1997
    Assignee: The Dow Chemical Company
    Inventors: Dennis A. Hucul, Stephen F. Hahn
  • Adhesion methods employing benzocyclobutene-based organosilane adhesion aids
    Patent number: 5002808
    Abstract: Benzocyclobutene-functionalized organosilanes, and a method of increasing adhesion between a polymer and an inorganic surface by using benzocyclobutene-functionalized organosilanes as adhesion aids.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: March 26, 1991
    Assignee: The Dow Chemical Company
    Inventors: Stephen F. Hahn, Dennis J. Kreil
  • Benzocyclobutene-based organosilane adhesion aids
    Patent number: 4831172
    Abstract: Benzocyclobutene-functionalized organosilanes, and a method of increasing adhesion between a polymer and an inorganic surface by using benzocyclobutene-functionalized organosilanes as adhesion aids.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: May 16, 1989
    Assignee: The Dow Chemical Company
    Inventors: Stephen F. Hahn, Dennis J. Kreil
  • Polymeric monoarylcyclobutane compositions
    Patent number: 4783514
    Abstract: Polymeric compositions are comprised of, in polymerized form, a monomer which contains one reactive arylcyclobutane moiety.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: November 8, 1988
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Kirchhoff, Alan K. Schrock, Stephen F. Hahn
  • Arylcyclobutane/dienophile copolymer
    Patent number: 4730030
    Abstract: Copolymer compositions comprise, in polymerized form, a comonomer containing at least two polymerizable arylcyclobutane moieties, and a comonomer containing at least two polymerizable dienophilic moieties, such as maleimide moieties.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: March 8, 1988
    Assignee: The Dow Chemical Company
    Inventors: Stephen F. Hahn, Robert A. Kirchhoff
  • Unsaturated alkyl monoarylcyclobutane monomers
    Patent number: 4724260
    Abstract: Monomeric compositions comprising a monomer containing one arylcyclobutane moiety, and a molecular group comprising at least one unsaturated alkyl group are provided.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: February 9, 1988
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Kirchhoff, Alan K. Schrock, Stephen F. Hahn
  • Alkynyl-bridged poly(arylcyclobutene) resins
    Patent number: 4687823
    Abstract: Arylcyclobutene resins are comprised of alkynyl groups bridging at least two arylcyclobutene moieties.
    Type: Grant
    Filed: July 1, 1986
    Date of Patent: August 18, 1987
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Kirchhoff, Stephen F. Hahn