Patents Represented by Attorney C. Alexander

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  • Treated photoconductive titanium dioxide sheet
    Patent number: 4187103
    Abstract: A photoconductive copy sheet suitable as an intermediate in an electrographic process, the copy sheet containing photoconductive titanium dioxide and decay retarder in the form of an organic acid or salt thereof. Preferably, the titanium dioxide is of a type having a characteristic relaxation time of less than 9 minutes whereby the copy sheet is capable of producing at least 5 and as many as 100 copies per exposure.
    Type: Grant
    Filed: July 17, 1974
    Date of Patent: February 5, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: William L. Chambers
  • Liquid compositions containing triarylsulfonium complex salts and oxyethylene material
    Patent number: 4186108
    Abstract: Liquid compositions are described which comprise certain sulfonium complex salts dissolved in oxyethylene-containing organic material. The compositions are dilutable with, for example, epoxides to form photocopolymerizable compositions.
    Type: Grant
    Filed: February 8, 1978
    Date of Patent: January 29, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert C. Carlson, Albert H. Stoskopf
  • Complex salt photoinitiator
    Patent number: 4173476
    Abstract: A triarylsulfonium complex salt is described which has particular utility as a photoinitiator for the polymerization of epoxide monomers in thick films or coatings. Photopolymerizable compositions are also described.
    Type: Grant
    Filed: February 8, 1978
    Date of Patent: November 6, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: George H. Smith, Peter M. Olofson
  • Compositions and methods for inhibiting plaque formation
    Patent number: 4161518
    Abstract: A dentifrice composition is provided containing a quaternary ammonium organosiloxane having the formula ##STR1## wherein R.sup.1 is an alkoxy group having from 1 to 5 carbon atoms, R.sup.2 is an alkylene group having from 1 to 25 carbon atoms, and R.sup.3, R.sup.4 and R.sup.5 are, individually, alkyl groups of from 1 to 25 carbon atoms, and X is an anion, preferably selected from chlorine, bromine fluorine and iodine. A method of inhibiting plaque formation on teeth in an oral environment is also provided.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: July 17, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Richard Y. Wen, Linda L. LaFleur, Michael R. Engel, Anthony J. Lucas
  • In vitro diagnostic test
    Patent number: 4115534
    Abstract: A method for determining the concentration of substances in biological fluids (e.g., drugs, hormones, vitamins and enzymes) is disclosed wherein magnetically responsive, permeable, solid, water-insoluble microparticles are employed.
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: September 19, 1978
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Dionyssis S. Ithakissios
  • Compartmented package
    Patent number: 4081077
    Abstract: A compartmented package is described comprising a unitary body member having a cavity therein adapted to contain at least two co-reactive components separated into compartments by means of an elongated mixing tool. The top portion of the cavity is closed or covered by means of an openable cover member (e.g. a transparent plastic film removably secured to the unitary body member).
    Type: Grant
    Filed: January 13, 1977
    Date of Patent: March 28, 1978
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Gerald R. Franck