Patents by Inventor Michael A. Kropp

Michael A. Kropp 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: 6069214
    Abstract: A composition of matter includes a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: May 30, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
  • Patent number: 5863664
    Abstract: A composition of matter includes a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: January 26, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
  • Patent number: 5856022
    Abstract: A composition of matter includes a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: January 5, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
  • Patent number: 5744557
    Abstract: A composition of matter including a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.
    Type: Grant
    Filed: June 16, 1993
    Date of Patent: April 28, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
  • Patent number: 5685939
    Abstract: A Z-axis adhesive is produced by dispersing electrically-conductive particles in an organic binder and then imagewise exposing the material to electromagnetic radiation, preferably from a laser or a flash lamp, under conditions sufficient to transfer the particles from the binder to a receptor in a patterned fashion such that the resulting adhesive is a Z-axis conductor in the patterned areas. The patterned adhesive can then be used to establish electrical interconnection between facing electrodes of a number of different structures including semiconductor chips and a flexible printed circuit board.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: November 11, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Martin B. Wolk, Thomas A. Isberg, Michael A. Kropp, William V. Dower, Joel A. Gerber
  • Patent number: 5672400
    Abstract: The present invention provides a microelectronic assembly wherein a semi-crystalline copolymer adhesive composition, preferably provided in the form of a film, is used to electrically interconnect a first circuit pattern on a first substrate to a second circuit pattern on a second substrate. The adhesive composition preferably includes a semi-crystalline copolymer comprising polyether and polyamide monomeric units, a tackifier, and conductive particles.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: September 30, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dennis D. Hansen, Michael A. Kropp, Glen Connell
  • Patent number: 5620795
    Abstract: Pressure sensitive adhesives and heat activatable adhesives that are the reaction product of an acrylic acid ester of a monohydric alcohol whose homopolymer has a T.sub.g less than 0.degree. C.; a non-polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of no greater than 10.50 and a T.sub.g greater than 15.degree. C.; 0-5 parts by weight of a polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of greater than 10.50 and a T.sub.g greater than 15.degree. C.; and an electrically conductive agent.
    Type: Grant
    Filed: July 10, 1995
    Date of Patent: April 15, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Christopher A. Haak, Michael A. Kropp, Greggory S. Bennett
  • Patent number: 5554664
    Abstract: An energy-sensitive (e.g., thermal, radiation or photosensitive) initiator, curative, and/or catalytic salt that has an anion comprising a tris-(highly fluorinated alkylsulfonyl)methide, tris-(fluorinated arylsulfonyl)methide, bis-(highly fluorinated alkyl)sulfonyl imide, bis-(fluorinated aryl)sulfonyl imide, mixed aryl- and alkylsulfonyl imides and methides and any combinations thereof, has improved solubility in organic solvents, exhibit minimal corrosiveness when coatings and adhesives are prepared using the initiator, curative and/or catalytic salts, generates a highly reactive initiator, curative, and/or catalyst upon activation by energy.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: September 10, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William M. Lamanna, Michael C. Palazzotto, Wayne S. Mahoney, Michael A. Kropp
  • Patent number: 5399637
    Abstract: Polymerizable compositions having at least one cationically polymerizable monomer; an optional free radically polymerizable monomer; an energy-polymerizable catalyst system wherein the catalyst system comprises an organometallic complex salt; a thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with the metal ion of the organometallic complex salt; optionally, a peroxide. The polymerized compositions are useful as cured adhesive films, pressure sensitive adhesives, protective coatings, liquid adhesives, structural and semi-structural adhesives, and free standing films.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: March 21, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Peggy S. Willett, Janis Robins, Kent S. Tarbutton, Michael A. Kropp
  • Patent number: 5362421
    Abstract: An anisotropically conductive adhesive composition provides electrical conductivity between facing electrodes but maintains electric insulation laterally between adjacent electrodes and comprises (a) a cationically polymerizable monomer, such as a glycidyl epoxy resin; (b) a thermoplastic resin, essentially free of nucleophilic or metal complexing functional groups; (c) optionally, an alcohol containing material; (d) a thermally initiated catalyst system comprising: (1) a salt of an organometallic cation; (2) a cure rate enhancer; and (3) a stabilizing additive; (e) conductive particles; and (f) optionally, a silane coupling agent, wherein the adhesive compositions cure at a temperature of 120.degree.-125.degree. C.
    Type: Grant
    Filed: June 16, 1993
    Date of Patent: November 8, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Michael A. Kropp, Wayne S. Mahoney
  • Patent number: 5310840
    Abstract: Polymerizable compositions having at least one cationically polymerizable monomer; an optional free radically polymerizable monomer; an energy-polymerizable catalyst system wherein the catalyst system comprises an organometallic complex salt; a thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with the metal ion of the organometallic complex salt; optionally, a peroxide. The polymerized compositions are useful as cured adhesive films, pressure sensitive adhesives, protective coatings, liquid adhesives, structural and semi-structural adhesives, and free standing films.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: May 10, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Peggy S. Willett, Janis Robins, Kent S. Tarbutton, Michael A. Kropp
  • Patent number: 5252694
    Abstract: Polymerizable compositions having at least one cationically polymerizable monomer; an optional free radically polymerizable monomer; an energy-polymerizable catalyst system wherein the catalyst system comprises an organometallic complex salt; a thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with the metal ion of the organometallic complex salt; optionally, a peroxide. The polymerized compositions are useful as cured adhesive films, pressure sensitive adhesives, protective coatings, liquid adhesives, structural and semi-structural adhesives, and free standing films.
    Type: Grant
    Filed: January 22, 1992
    Date of Patent: October 12, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Peggy S. Willett, Janis Robins, Kent S. Tarbutton, Michael A. Kropp