Patents by Inventor Margaret C. Etter

Margaret C. Etter 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).

  • Optically nonlinear aromatic carboxylic acid complexes
    Patent number: 5080832
    Abstract: Optically nonlinear aromatic carboxylic acid cocrystals are provided of the formula: ##STR1## wherein each R is CN or NO.sub.2, n is 1-4, m is 1-3 and X and Y are individually (C.sub.1 -C.sub.3)alkyl, (C.sub.1 -C.sub.3)-alkanolyl, (C.sub.1 -C.sub.3)alkoxycarbonyl, ar(C.sub.1 -C.sub.5)alkyl, aryl, (C.sub.1 -C.sub.3)alkoxy, hydroxy, halo or mixtures thereof.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: January 14, 1992
    Assignee: Regents of the University of Minnesota
    Inventors: Margaret C. Etter, Gayle M. Frankenbach
  • Optically nonlinear aromatic carboxylic acid complexes
    Patent number: 4992214
    Abstract: Optically nonlinear aromatic carboxylic acid cocrystals are provided of the formula: ##STR1## wherein each R is CN or NO.sub.2, n is 1-4, m is 1-3 and X and Y are individually (C.sub.1 -C.sub.3)alkyl, (C.sub.1 -C.sub.3)alkanolyl, (C.sub.1 -C.sub.3)alkoxycarbonyl, ar(C.sub.1 -C.sub.5)alkyl, aryl, (C.sub.1 -C.sub.3)alkoxy, hydroxy, halo or mixtures thereof.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: February 12, 1991
    Assignee: Regents of the University of Minnesota
    Inventors: Margaret C. Etter, Gayle M. Frankenbach
  • Optically nonlinear pyridine-N-oxide complexes
    Patent number: 4959477
    Abstract: Compounds capable of second harmonic generation are provided for use in a nonlinear optical device, in combination, a harmonic-generating medium, means for introducing coherent radiation into said harmonic-generating medium, and means for utilizing the coherent radiation emitted from said medium, wherein said medium consists essentially of a crystalline body of a compound of the formula: ##STR1## wherein n is about 0-5, m is about 0-5, R.sup.1 is individually --NO.sub.2, --OR.sup.2, --CH, --NR.sup.2 R.sup.3, (C.sub.1 -C.sub.5)alkyl, --CO.sub.2 H, halo, ##STR2## R is individually --NO.sub.2, --CH.sub.3, --OR.sup.2, --NR.sup.2 R.sup.3, --CN, ##STR3## and X is --O--, --S--, --N(R.sup.2)--, ##STR4## or --C.tbd.C--; and wherein R.sup.2 and R.sup.3 are individually H, (C.sub.1 -C.sub.5 alkyl, aryl or ar(C.sub.1 -C.sub.5)alkyl.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: September 25, 1990
    Assignee: Regents of the University of Minnesota
    Inventors: Margaret C. Etter, Gayle M. Frankenbach, Thomas W. Panunto
  • Optically nonlinear pyridine-N-oxide complexes
    Patent number: 4839536
    Abstract: Compounds capable of second harmonic generation are provided for use in a nonlinear optical device, in combination, a harmonic-generating medium, means for introducing coherent radiation into said harmonic-generating medium, and means for utilizing the coherent radiation emitted from said medium, wherein said medium consists essentially of a crystalline body of a compound of the formula: ##STR1## wherein n is about 0-5, m is about 0-5, R.sup.1 is individually --NO.sub.2, --OR.sup.2, --CN, --NR.sup.2 R.sup.3, (C.sub.1 -C.sub.5)alkyl, --CO.sub.2 H, halo, ##STR2## R is individually --NO.sub.2, --CH.sub.3, --OR.sup.2, --NR.sup.2 R.sup.3, --CN, ##STR3## and X is --O--, --S--, --N(R.sup.2)--, ##STR4## and wherein R.sup.2 and R.sup.3 are individually H, (C.sub.1 -C.sub.5)alkyl, aryl or ar(C.sub.1 -C.sub.5)alkyl.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: June 13, 1989
    Assignee: Regents of the University of Minnesota
    Inventors: Margaret C. Etter, Gayle M. Frankenbach, Thomas W. Panunto
  • Cation complexes between cation guests and polymer hosts that contain cyclic ether units
    Patent number: 4376190
    Abstract: Complex compositions that comprise a cation guest and a polymer host are provided. The polymer host contains one or more cation-complexing segments that contain hetero atoms in a polydentate complexing array. At least two of the hetero atoms in the cation complexing segment comprise a cyclic ether selected from tetrahydrofuran 2,5-diyl units and tetrahydropyran 2,6-diyl units.
    Type: Grant
    Filed: November 26, 1979
    Date of Patent: March 8, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William J. Schultz, Margaret C. Etter, Alphonsus V. Pocius, Samuel Smith