Patents by Inventor Robert J. Koshar

Robert J. Koshar 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: 5676884
    Abstract: Nonlinear optical (NLO) compositions are disclosed which contain polar disulfone-functionalized molecules (PDFMs) incorporated in a polymeric material. when aligned noncentrosymmetrically in the polymeric material, the PDFMs generate a second-order NLO response. There is also disclosed: a method of preparing a NLO composition; novel PDFMs and novel polymers; and a new process for preparing PDFMs.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: October 14, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: George V. Tiers, Robert J. Koshar, Louis M. Leichter
  • Patent number: 5578251
    Abstract: A process for preparing polar disulfone-functionalized molecules, which process comprises performing one or more of the following reactions:(i) reacting a vinyl ether disulfone molecule with an activated aromatic molecule, an activated heterocyclic molecule, a dye base, or a dye olefin;(ii) reacting an enamine disulfone molecule with a dye base or a dye olefin; and(iii) reacting an alkenyl disulfone molecule having a vinylogous methyl or methylene group conjugatively located relative to the disulfone group with an aldehyde or an acetal derived from an aldehyde.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: November 26, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gary T. Boyd, George V. Tiers, Cecil V. Francis, Eugene P. Janulis, Robert J. Koshar, Louis M. Leichter
  • Patent number: 5360582
    Abstract: Nonlinear optical (NLO) compositions are disclosed which contain polar disulfone-functionalized molecules (PDFMs) incorporated in a polymeric material. When aligned noncentrosymmetrically in the polymeric material, the PDFMs generate a second-order NLO response. There is also disclosed: a method of preparing a NLO composition; novel PDFMs and novel polymers; and a new process for preparing PDFMs.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: November 1, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gary T. Boyd, George V. Tiers, Cecil V. Francis, Eugene P. Janulis, Robert J. Koshar, Louis M. Leichter
  • Patent number: 4600774
    Abstract: Cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides, amide derivatives thereof, a process for making the same, curable compositions containing cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides or amide derivatives thereof and cationically-sensitive monomers, and a process for using cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides or amide derivatives thereof as catalysts for the cure of cationically-sensitive monomers.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: July 15, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 4565714
    Abstract: A low surface energy material is a hydrosilation reaction product of an ethylenically-unsaturated perfluoropolyether with a compound containing silicon-bonded hydrogen. A substrate bearing the low surface energy coating of the invention can be used in low-adhesion articles, for example, in adhesive tapes, for cooking utensils, ice-release for aircraft, or for magnetic recording media.
    Type: Grant
    Filed: June 14, 1984
    Date of Patent: January 21, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 4543398
    Abstract: Shaped articles, particularly ophthalmic devices, can be fabricated from oxygen transmissive, hydrolytically stable, polysiloxane copolymers of readily prepared poly(organosiloxane) monomers having monourethane acrylate groups and copolymerizable ethylenically-unsaturated monomers. The ophthalmic devices comprise copolymers of compositions containing 15 to 100 percent of said organopolysiloxane urethane acrylate and 85 to 0 percent of copolymerizable ethylenically-unsaturated monomers.Ophthalmic devices which are fabricated from monourethane acrylates of polysiloxane alcohols have high oxygen permeability. A novel process is disclosed for the preparation of these polysiloxanes which have at least one urethane acrylate substituent.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: September 24, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Stephen W. Bany, Robert J. Koshar, Todd R. Williams
  • Patent number: 4429093
    Abstract: Acidic cyclic perfluoroaliphaticdisulfonimides, salts thereof, a process for making the same, curable compositions containing acidic cyclic perfluoroaliphaticdisulfonimides or salts thereof and cationically-sensitive monomers, and a process for using acidic cyclic perfluoroaliphaticdisulfonimides and salts thereof as catalysts for the cure of cationically-sensitive monomers.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: January 31, 1984
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventor: Robert J. Koshar
  • Patent number: 4387222
    Abstract: Acidic cyclic perfluoroaliphaticdisulfonimides, salts thereof, a process for making the same, curable compositions containing acidic cyclic perfluoroaliphaticdisulfonimides or salts thereof and cationically-sensitive monomers, and a process for using acidic cyclic perfluoroaliphaticdisulfonimides and salts thereof as catalysts for the cure of cationically-sensitive monomers.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: June 7, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 4332954
    Abstract: Cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides, amide derivatives thereof, a process for making the same, curable compositions containing cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides or amide derivatives thereof and cationically-sensitive monomers, and a process for using cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides or amide derivatives thereof as catalysts for the cure of cationically-sensitive monomers.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: June 1, 1982
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 4313988
    Abstract: This invention relates to cured epoxypolysiloxanes and their blends with epoxy-terminated silanes which are useful as release coatings for adhesive roll and sheet materials.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: February 2, 1982
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert J. Koshar, Stephen W. Bany
  • Patent number: 4247674
    Abstract: Bis(fluoroaliphaticsulfonyl)imides are used as catalysts for the ring-opening polymerization of organocyclosiloxanes to produce lubricants, coatings or rubber precursors.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: January 27, 1981
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert J. Koshar, Stephen W. Bany
  • Patent number: 4243783
    Abstract: Fluoroaliphaticsulfonyl substituted ethylenes, useful as catalysts in polymerization of monomers, e.g., epoxide, vinyl ether, and N-vinyl monomers, are prepared by condensation of precursor fluoroaliphaticsulfonyl methanes with aldehydes or N-formyl compounds.
    Type: Grant
    Filed: September 8, 1978
    Date of Patent: January 6, 1981
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 4156696
    Abstract: Fluoroaliphaticsulfonyl substituted methanes have the general formula ##STR1## WHEREIN R.sub.f is a fluoroaliphatic radical R.sub.3 is a radical selected from a group consisting of alkyl, perfluoroaliphatic or aryl. The fluoroaliphaticsulfonyl methanes may be condensed with aldehydes or N-formyl compounds to produce fluoroaliphaticsulfonyl substituted ethylenes which are useful as catalysts.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: May 29, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 4069233
    Abstract: Fluoroaliphaticsulfonyl substituted ethylenes, useful as catalysts in polymerization of monomers, e.g., epoxide, vinyl ether, and N-vinyl monomers, are prepared by condensation of precursor fluoroaliphaticsulfonyl methanes with aldehydes or N-formyl compounds.
    Type: Grant
    Filed: May 7, 1976
    Date of Patent: January 17, 1978
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 4054596
    Abstract: 1,1-Bis(perfluoroalkylsulfonyl)propanes substituted in the three position by two to three electron-withdrawing groups, particularly perfluoroalkylsulfonyl, carboxyl, carboalkoxy or cyano are catalysts for the polymerization of aromatic epoxy resins.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: October 18, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert J. Koshar, Loren L. Barber, Jr.
  • Patent number: 4053519
    Abstract: 1,1-Bis(perfluoroalkylsulfonyl)propanes substituted in the three position by two to three electron-withdrawing groups, particularly perfluoroalkylsulfonyl, carboxyl, carboalkoxy or cyano are catalysts for the polymerization of aromatic epoxy resins.
    Type: Grant
    Filed: July 12, 1976
    Date of Patent: October 11, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert J. Koshar, Loren L. Barber, Jr.
  • Patent number: 4031036
    Abstract: Bis(fluoroaliphaticsulfonyl)imides, in active or latent form, are used as catalysts for the polymerization of cationic sensitive monomers, e.g., epoxy resins.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: June 21, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 3984357
    Abstract: Fluoroaliphaticsulfonyl substituted ethylenes, useful as catalysts in polymerization of monomers, e.g., epoxide, vinyl ether, and N-vinyl monomers, are prepared by condensation of precursor fluoroaliphaticsulfonyl methanes with aldehydes or N-formyl compounds.
    Type: Grant
    Filed: March 27, 1974
    Date of Patent: October 5, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar
  • Patent number: 3962346
    Abstract: Bis(perfluoroalkylsulfonyl)methanes condense with formaldehyde to give highly reactive 1,1-bis(perfluoroalkylsulfonyl)ethenes which are useful as catalysts for epoxy resins.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: June 8, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Loren L. Barber, Jr., Robert J. Koshar
  • Patent number: 3932526
    Abstract: Fluoroaliphaticsulfonyl substituted ethylenes, useful as catalysts in polymerization of monomers, e.g., epoxide, vinyl ether, and N-vinyl monomers, are prepared by condensation of precursor fluoroaliphaticsulfonyl methanes with aldehydes or N-formyl compounds.
    Type: Grant
    Filed: October 25, 1972
    Date of Patent: January 13, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Koshar