Patents by Inventor Sheila M. Nichols

Sheila M. Nichols 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: 5597557
    Abstract: A process for making solid colored particles by preparing a reaction solution in water comprising formaldehyde, urea, a cyclic polyamine functional triazine compound, and acid. A dye can be incorporated into the reaction solution if a color other than white is desired. Particles are formed having an average particle size between 1 and 70 microns without the need to resort to crushing to break up agglomerates. Particles made by this process provide excellent color and are easily washable from a substrate when incorporated into a washable formulation.Additionally, it has been found that the incorporation of colored microcapsules of average size of 1-70 microns where the color is located primarily on or in the shell of the microcapsule also provides excellent washable compositions when incorporated into a washable formulation.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: January 28, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kanta Kumar, Robert A. Davis, Sheila M. Nichols, Howard J. Buttery
  • Patent number: 5460805
    Abstract: Body powder is provided having microcapsules with a colorant located in or on the shell of said microcapsule. The microcapsules are present in an amount effective to impart color to the body powder when viewed in bulk and to substantially decrease in perceptible color upon rubbing said body powder on the skin.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: October 24, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert A. Davis, Sheila M. Nichols, Howard J. Buttery
  • Patent number: 5411802
    Abstract: A process for making solid colored particles by preparing a reaction solution in water comprising formaldehyde, urea, a cyclic polyamine functional triazine compound, and acid. A dye can be incorporated into the reaction solution if a color other than white is desired. Particles are formed having an average particle size between 1 and 70 microns without the need to resort to crushing to break up agglomerates. Particles made by this process provide excellent color and are easily washable from a substrate when incorporated into a washable formulation.Additionally, it has been found that the incorporation of colored microcapsules of average size of 1-70 microns where the color is located primarily on or in the shell of the microcapsule also provides excellent washable compositions when incorporated into a washable formulation.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: May 2, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kanta Kumar, Robert A. Davis, Sheila M. Nichols, Howard J. Buttery