Patents Represented by Attorney, Agent or Law Firm Lorraine R. Sherman
  • Patent number: 5667893
    Abstract: The present invention relates to an article comprising a substrate which has coated thereon a photopolymerizable epoxy composition containing a plurality of epoxides including at least one selected from the group consisting of bisphenol A epoxides and cycloaliphatic epoxides, and at least one aliphatic epoxide, from about 0.1% to about 2% of at least one organometallic cationic initiator capable of initiating polymerization at wavelengths of from about 200 to about 600 nm, and optionally at least one accelerating agent. The article can be a flexible tape backing or a chip-resistant paint.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: September 16, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kevin E. Kinzer, Lowell W. Holland, Krishnamurthy Sridhar, James N. Kellen, Richard W. Pribnow
  • Patent number: 5639372
    Abstract: A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of molecular sieves to matrix being in the range of 40:1 to 1:40.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: June 17, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald F. Hagen, Paul E. Hansen, Craig G. Markell
  • Patent number: 5637506
    Abstract: A method of radiochemical analysis having the steps of providing a solid phase extraction sheet material containing ion-specific sorptive or reactive particles in a porous matrix as carrier for the particles, and providing a fluid including an ion-containing radiochemical analyte, contacting the sheet material with the fluid for a time sufficient for the particles to selectively extract the analyte from the fluid, and analyzing the sheet material in a direct mode for quantitative or qualitative data relating to the radiochemical analyte. Solid phase extraction sheet materials and methods for their preparation are also disclosed.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: June 10, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Garold L. Goken, Wolfgang H. Strehlow
  • Patent number: 5635060
    Abstract: A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of molecular sieves to matrix being in the range of 40:1 to 1:40.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: June 3, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald F. Hagen, Paul E. Hansen, Craig G. Markell
  • Patent number: 5620663
    Abstract: The support plate accommodating and being integrally connected with a plurality of adjacent sample containers is disclosed. Each sample container is suitable to accommodate a liquid sample to be separated into components and has an inlet opening and an outlet opening between which a separation layer is arranged. The sample container has a bottom wall in which the outlet opening is located and the outlet opening encloses an outlet spout having an inner diameter in the range of 0.1 to 1 mm and a length in the range of 5 to 20 mm. The ratio between the inner diameter of the outlet spout and its length is in the range of 0.005 to 0.2.
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: April 15, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James E. Aysta, Metin Colpan
  • Patent number: 5618438
    Abstract: A functionalized macroporous poly(styrene divinylbenzene) particle comprises at least one ionic functional group covalently bonded thereto, the functionalized particle having sorptive capability towards an analyte, said functional group being present in the range of 0.1 to 2.5 milliequivalents per gram of poly(styrene divinylbenzene). The functionalized particles can be used in a packed column or enmeshed in a nonwoven web for utility in solid phase extraction applications.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: April 8, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James S. Fritz, Philip J. Dumont, Donald F. Hagen, Craig G. Markell, Luther W. Schmidt
  • Patent number: 5616407
    Abstract: A functionalized macroporous poly(styrene divinylbenzene) particle comprises at least one ionic functional group covalently bonded thereto, the functionalized particle having sorptive capability towards an analyte, said functional group being present in the range of 0.1 to 2.5 milliequivalents per gram of poly(styrene divinylbenzene). The functionalized particles can be used in a packed column or enmeshed in a nonwoven web for utility in solid phase extraction applications.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: April 1, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James S. Fritz, Donald F. Hagen, Craig G. Markell
  • Patent number: 5614105
    Abstract: Insolubilized enzyme particulates are located on the upstream surface of a filtration layer of a filtering element which can be used in a cartridge filter. Employed in a recycling flow reaction system at relatively high flux rates, the cartridges are useful for conducting catalyzed chemical reactions of dissolved solutes, for example, esterifications, isomerizations, oxidations, reductions, and cyclizations.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: March 25, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Steven M. Heilmann, Gary J. Drtina, Philip D. Eitzman, Louis C. Haddad, Frederick W. Hyde, Todd W. Johnson
  • Patent number: 5595649
    Abstract: A particle loaded, porous, fibrous compressed or fused article comprises a nonwoven fibrous polymeric web, which preferably is thermoplastic, melt-extrudable, and pressure-fusible blown microfibrous web, and sorptive particles enmeshed in said web, the particle loaded fibrous article has a Gurley number of at least two seconds, and the article is useful in separation science. A method of preparation of the article and method of use is also disclosed.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: January 21, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Craig G. Markell, Donald F. Hagen, Paul E. Hansen, Nicholas R. Baumann
  • Patent number: 5574296
    Abstract: An electromagnetic radiation transducer is provided having a p-type ZnSe layer and an n-type layer. The p-type ZnSe layer has a net donor to net acceptor ratio (N.sub.D /N.sub.A) of less than or equal to about 0.8. The net acceptor concentration is greater than about 5.times.10.sup.15 cm .sup.-3 and the resistivity is less than 15 .OMEGA.-cm. The p-type ZnSe layer is deposited by doping the ZnSe during fabrication with a neutral free-radical source.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: November 12, 1996
    Assignee: Minnesota Mining And Manufacturing Company
    Inventors: Robert M. Park, James M. DePuydt, Hwa Cheng, Michael A. Haase
  • Patent number: 5558771
    Abstract: Composite articles are useful for separating mercury from fluids. The composite articles can be porous supports comprising an inert substrate having immobilized thereon finely divided gold optionally in combination with a tin salt coating. The porous support can be a particulate or porous fibrous webs. Alternatively, the composite articles can comprise a porous fibrous membrane having enmeshed therein the aforementioned porous supports which can be in particulate or fibrous forms. The method for separating elemental, ionic, or organic mercury in fluids comprises the step of contacting and passing a fluid containing mercury through a support comprising a porous, high surface area, inert substrate on which is immobilized finely divided elemental gold at a controlled rate for a time sufficient for the mercury to sorb to the elemental gold and to provide an immobilized gold-mercury amalgam on the support. If a tin salt also is immobilized on the inert substrate, mercury-tin salt can also be formed.
    Type: Grant
    Filed: December 4, 1995
    Date of Patent: September 24, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald F. Hagen, Wanda Bahmet, Louis C. Haddad, Robert E. Perkins
  • Patent number: 5529686
    Abstract: A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of molecular sieves to matrix being in the range of 40:1 to 1:40.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: June 25, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald F. Hagen, Paul E. Hansen, Craig G. Markell
  • Patent number: 5506279
    Abstract: The invention provides novel acrylamide functional disubstituted acetyl aryl ketones and a process for their preparation in high yields uncontaminated by difunctional material. The invention further provides photocrosslinkable compositions comprising one or more ethylenically-unsaturated monomers and as photoinitiator the acrylamide functional disubstituted acetyl aryl ketone of the invention. The compositions are useful for the preparation of films and coatings, particularly pressure-sensitive adhesive coatings.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: April 9, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gaddam N. Babu, Greggory S. Bennett, Kejian Chen, Steven M. Heilmann, Howell K. Smith, II, Louis E. Winslow
  • Patent number: 5494943
    Abstract: The present invention provides an energy polymerizable composition comprising at least one epoxy monomer or at least one vinyl ether monomer and an initiation system therefor, the initiation system comprising at least one organometallic complex salt and at least one stabilizing additive. The cured composition provides useful articles or coated articles.
    Type: Grant
    Filed: June 16, 1993
    Date of Patent: February 27, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Wayne S. Mahoney, Michael C. Palazzotto
  • Patent number: 5494981
    Abstract: A polymerizable composition of matter comprises a cycloaliphatic epoxy resin, a cyanate ester resin, optionally a polyol, and, as initiator, a Bronsted acid. When cured, the compositions provide interpenetrating polymer networks (IPNs). The IPNs are useful as high temperature stable vibration damping materials, adhesives, binders for abrasives, and protective coatings.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: February 27, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ilya Gorodisher, Michael C. Palazzotto
  • Patent number: 5492627
    Abstract: Composite articles are useful for separating mercury from fluids. The composite articles can be porous supports comprising an inert substrate having immobilized thereon finely divided gold optionally in combination with a tin salt coating. The porous support can be a particulate or porous fibrous webs. Alternatively, the composite articles can comprise a porous fibrous membrane having enmeshed therein the aforementioned porous supports which can be in particulate or fibrous forms. The method for separating elemental, ionic, or organic mercury in fluids comprises the step of contacting and passing a fluid containing mercury through a support comprising a porous, high surface area, inert substrate on which is immobilized finely divided elemental gold at a controlled rate for a time sufficient for the mercury to sorb to the elemental gold and to provide an immobilized gold-mercury amalgam on the support. If a tin salt also is immobilized on the inert substrate, mercury-tin salt can also be formed.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: February 20, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald F. Hagen, Wanda Bahmet, Louis C. Haddad, Robert E. Perkins
  • Patent number: 5491206
    Abstract: A polymerizable composition comprises at least one ring-strained non-conjugated cyclic olefin, a two-part transition metal-containing catalyst wherein said transition metal is selected from the group consisting of Periodic Groups 6 to 10, said catalyst being air and moisture stable and comprises a transition metal-containing catalyst, provided that the oxidation state of the transition metal is in the range of +3 to 0, and as cocatalyst an organosilane comprising at least one group selected from the group consisting of ##STR1## groups.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: February 13, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Katherine A. Brown-Wensley, Michael C. Palazzotto, William M. Lamanna, Larry D. Boardman, John E. Gozum, Fred B. McCormick
  • Patent number: 5478466
    Abstract: Insolubilized enzyme particulates are located on the upstream surface of a filtration layer of a filtering element which can be used in a cartridge filter. Employed in a recycling flow reaction system at relatively high flux rates, the cartridges are useful for conducting catalyzed chemical reactions of dissolved solutes, for example, esterifications, isomerizations, oxidations, reductions, and cyclizations.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: December 26, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Steven M. Heilmann, Gary J. Drtina, Philip D. Eitzman, Louis C. Haddad, Frederick W. Hyde, Todd W. Johnson
  • Patent number: 5474912
    Abstract: Targeted gene insertion methodology can increase the production of an antimicrobial metabolite and comprises the steps of:a) identifying the gene in unaltered chromosomal DNA which encodes an enzyme that catalyzes the rate controlling step in a biosynthetic pathway in the production of increased concentration of a precursor to a core molecule which leads to the antimicrobial metabolite; andb) inserting into unaltered chromasomal DNA a genetic delivery vehicle (such as a vector, phage, or virus) which carries a gene which encodes the enzyme that catalyzes the rate controlling step in the biosynthesis in the production of a core molecule which is a precursor to the antimicrobial metabolite into unaltered chromosomal DNA, said delivery vehicle being compatible with said unaltered chromosomal DNA, the delivery vehicle being generated byinserting at least one exact or modified copy of the gene determining the rate controlling step into the compatible delivery vehicle, andinserting the delivery vehicle containing t
    Type: Grant
    Filed: March 3, 1994
    Date of Patent: December 12, 1995
    Inventors: David H. Sherman, Wei-Shou Hu, Li-Hong Malmberg
  • Patent number: 5470532
    Abstract: Composite reactive articles are useful for quantifying cyanide ions in solution. The composite reactive articles can be porous reactive supports comprising an inert substrate having immobilized thereon finely divided gold. The porous reactive supports can be particulate, porous fibrous membranes or solution-cast membranes. Alternatively, the composite reactive articles can comprise porous fibrous membranes having enmeshed therein the aforementioned porous supports which can be in particulate or fibrous forms.
    Type: Grant
    Filed: April 6, 1994
    Date of Patent: November 28, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald F. Hagen, Louis C. Haddad, Robert E. Perkins, Craig G. Markell