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).

  • Patent number: 6479594
    Abstract: Sulfonated substantially random interpolymers made from monomer components comprise from 1 to 65 mole percent of (a) at least one vinyl or vinylidene aromatic monomer, or (b) at least one hindered aliphatic or cycloaliphatic vinylidene monomer, or (c) a combination of at least one vinyl or vinylidene aromatic monomer and at least one hindered aliphatic or cycloaliphatic vinylidene monomer, and from 35 to 99 mole percent of at least one aliphatic &agr;-olefin having from 2 to 20 carbon atoms; and optionally, from 0 to 20 mole percent of a diene containing from 4 to 20 carbon atoms; wherein the sulfonated interpolymer contains at least one mer (or moiety) of a group represented by the formula —SO3−M where M is hydrogen or a group 1, 7 or 12 metal in ionic form or combination thereof. Blends of these polymers with polyamides and polyolefins are made.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: November 12, 2002
    Assignee: The Dow Chemical Company
    Inventors: Yunwa W. Cheung, Stephen F. Hahn, James C. Stevens, Francis J. Timmers, Gregory F. Schmidt, Thoi H. Ho, Robert H. Terbrueggen
  • Patent number: 6476283
    Abstract: Organic compounds are hydrogenated in the presence of certain bis(pentadienyl) divalent Group IV metal complexes having &pgr;-bound, neutral, conjugated diene ligands. These complexes are effective hydrogenation catalysts for polymers containing ethylenic unsaturation. They further provide for selective hydrogenation of ethylenic unsaturation sites in the presence of aromatic groups.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: November 5, 2002
    Assignee: The Dow Chemical Company
    Inventors: David D. Devore, James C. Stevens, Stephen F. Hahn, Francis J. Timmers, David R. Wilson
  • Publication number: 20020150715
    Abstract: The present invention is a composition comprising an alternating hydrogenated block copolymer having at least two hydrogenated vinyl aromatic polymer blocks and at least one conjugated diene polymer block, wherein the number average molecular weights (Mn) of each block can be different.
    Type: Application
    Filed: October 31, 2001
    Publication date: October 17, 2002
    Inventors: Stephen F. Hahn, Glenn H. Fredrickson, Cora M. Leibig, Molly T. Reinhardt
  • Publication number: 20020147273
    Abstract: The present invention relates to a fiber produced form a composition comprising at least one hydrogenated block copolymer and, optionally, at least one other polymer selected from the group consisting of a reactive tailored liquid polyurethane, an elastomeric or sulfonated ethylene/vinyl aromatic interpolymer, an elastomeric ethylene/C3-C20 &agr;-olefin interpolymer, an C3-C20 &agr;-olefin/conjugated diene interpolymer, an elastic polypropylene polymer, an enhanced polypropylene polymer, an elastomeric thermoplastic polyurethane, an elastic copolyester, a partially hydrogenated block copolymer, an elastic polyamide, a hydroxyl functionalized polyether (or polyetheramine), a styrene/conjugated diene interpolymer, and an elastomeric metallocene-catalyzed synthetic polymer or a blend or formulated system thereof.
    Type: Application
    Filed: December 6, 2001
    Publication date: October 10, 2002
    Inventors: Rajen M. Patel, Pak-Wing S. Chum, Stephen F. Hahn, Leonie K. Walsh, Rexford A. Maugans, Selim Bensason, Thoi H. Ho, Calvin P. Esneault
  • Patent number: 6451924
    Abstract: The present invention is directed to a hydrogenated block copolymer of a vinyl aromatic and butadiene which is useful in the preparation of optical media discs having very low birefringence.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: September 17, 2002
    Assignee: Dow Global Technologies Inc.
    Inventors: Jerry L. Hahnfeld, Gary D. Parsons, Stephen F. Hahn, Mary Ann Jones
  • Publication number: 20020120053
    Abstract: This invention is a composition comprising (a) an oligomer or polymer dispersible in an organic solvent, having a low dielectric constant, or being curable to form a material having a low dielectric constant, (b) at least one organic solvent and (c) less than 1000 parts by weight of a polymeric coating additive per million parts by weight of total composition (ppm). The polymeric additive is characterized in that it is miscible with component (a) and the solvent system but becomes incompatible with the mixture of component (a) and solvent during the coating process.
    Type: Application
    Filed: July 18, 2001
    Publication date: August 29, 2002
    Inventors: Lynne K. Mills, JoLee M. Dominowski, Gene D. Rose, Deidre A. Strand, Kenneth L. Foster, Stephen F. Hahn
  • Patent number: 6426390
    Abstract: The present invention is directed to a composition comprising a hydrogenated block copolymer of a vinyl aromatic and conjugated diene polymer, having a lamellar morphology and high aromatic hydrogenation level.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: July 30, 2002
    Assignee: Dow Global Technology Inc.
    Inventors: Jerry L. Hahnfeld, Mary Ann Jones, Charles A. Berglund, Gary D. Parsons, Cora M. Leibig, Stephen F. Hahn
  • Publication number: 20020061982
    Abstract: Flexible hydrogenated block copolymers can be successfully used in a variety of applications including films, profiles, sheets, coatings, injection molded articles, blow or rotational molded articles and pultruded articles.
    Type: Application
    Filed: August 31, 2001
    Publication date: May 23, 2002
    Inventors: Robert J. Donald, Jerry L. Hahnfeld, Gary D. Parsons, Stephen F. Hahn, Rajen M. Patel, Calvin P. Esneault, Laura M. Phipps, James E. Pate, Debkumar Bhattacharjee
  • Publication number: 20020061981
    Abstract: Compositions comprising hydrogenated block copolymers can be successfully used in a variety of applications including films, profiles, sheets, pultruded articles, fibers, coated articles, injection molded articles and blow or rotational molded articles.
    Type: Application
    Filed: August 31, 2001
    Publication date: May 23, 2002
    Inventors: Robert J. Donald, Gary D. Parsons, Jerry L. Hahnfeld, Stephen F. Hahn, Rajen M. Patel, Laura M. Phipps, Calvin P. Esneault, James E. Pate
  • Patent number: 6376621
    Abstract: The present invention is directed to a hydrogenated copolymer of a vinyl aromatic and isoprene monomer which produces optical media discs having extremely low birefringence.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: April 23, 2002
    Assignee: The Dow Chemical Company
    Inventors: Jerry L. Hahnfeld, Stephen F. Hahn
  • Publication number: 20020042488
    Abstract: Novel substantially random functionalized interpolymers and processes for making them are disclosed. The novel interpolymers include those prepared from ethylene and vinyl aromatic monomers such as ethylene-styrene interpolymers which are then functionalized with a variety of electrophilic and nucleophilic reagents.
    Type: Application
    Filed: January 10, 2001
    Publication date: April 11, 2002
    Inventors: Ray E. Drumright, Robert H. Terbrueggen, Kenneth A. Burdett, Francis J. Timmers, Stephen F. Hahn
  • Publication number: 20020037988
    Abstract: Novel substantially random functionalized interpolymers and processes for making them are disclosed. The novel interpolymers include those prepared from ethylene and vinyl aromatic monomers such as ethylene-styrene interpolymers which are then functionalized with a variety of electrophilic and nucleophilic reagents.
    Type: Application
    Filed: October 10, 2001
    Publication date: March 28, 2002
    Inventors: Ray E. Drumright, Robert H. Terbrueggen, Kenneth A. Burdett, Francis J. Timmers, Stephen F. Hahn
  • Patent number: 6350820
    Abstract: The present invention is directed to a hydrogenated copolymer of a vinyl aromatic and conjugated diene monomer which produces optical media discs having extremely low birefringence.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: February 26, 2002
    Assignee: The Dow Chemical Company
    Inventors: Jerry L. Hahnfeld, Gary D. Parsons, Stephen F. Hahn, Mary Ann Jones
  • Publication number: 20020002233
    Abstract: The present invention is directed to a composition comprising:
    Type: Application
    Filed: February 2, 2001
    Publication date: January 3, 2002
    Inventors: Stephen F. Hahn, Jill R. Marra
  • Patent number: 6313252
    Abstract: Novel substantially random functionalized interpolymers and processes for making them are disclosed. The novel interpolymers include those prepared from ethylene and vinyl aromatic monomers such as ethylene-styrene interpolymers which are then functionalized with a variety of electrophilic and nucleophilic reagents.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: November 6, 2001
    Assignee: The Dow Chemical Company
    Inventors: Ray E. Drumright, Robert H. Terbrueggen, Kenneth A. Burdett, Francis J. Timmers, Stephen F. Hahn
  • Patent number: 6172165
    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: July 24, 1998
    Date of Patent: January 9, 2001
    Assignee: The Dow Chemical Company
    Inventors: Dennis A. Hucul, Stephen F. Hahn
  • Patent number: 6030680
    Abstract: The present invention is a amorphous saturated hydrocarbon thermoplastic substrate having enhanced adhesion properties, wherein the enhanced adhesion properties are obtained by treating the surface of the amorphous saturated hydrocarbon thermoplastic substrate with an excited gas phase technique, such that a critical surface energy of at least 35 dyne/cm is obtained without the use of acids or other corrosive materials which cause equipment degradation.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: February 29, 2000
    Assignee: The Dow Chemical Company
    Inventors: Stephen F. Hahn, Mark D. Newsham, William G. Lutz, Leonardo C. Lopez
  • Patent number: 5872201
    Abstract: Substantially random interpolymers comprising (1) ethylene, (2) one or more aromatic vinylidene monomers or hindered aliphatic or cycloaliphatic vinylidene monomers, and (3) one or more olefinic monomers having from 3 to about 20 carbon atoms. These interpolymers find utility as film, or as sheet or as a component of a multilayered structure, as fabricated articles, as foams, fibers or emulsions and as adhesives, in adhesive formulations and in sealant compositions.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: February 16, 1999
    Assignee: The Dow Chemical Company
    Inventors: Yunwa W. Cheung, Martin J. Guest, Francis J. Timmers, Stephen F. Hahn
  • Patent number: 5789638
    Abstract: Organic compounds are hydrogenated in the presence of certain monocyclopentadienyl Group IV metal compounds. These titanium compounds are effective hydrogenation catalysts for polymers containing ethylenic unsaturation. They further provide for selective hydrogenation of ethylenic unsaturation sites in the presence of aromatic groups.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: August 4, 1998
    Assignee: The Dow Chemical Company
    Inventors: Stephen F. Hahn, David R. Wilson
  • Patent number: 5700878
    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: December 23, 1997
    Assignee: The Dow Chemical Company
    Inventors: Dennis A. Hucul, Stephen F. Hahn