Patents by Inventor Katherine DuRussel

Katherine DuRussel 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).

  • Components and method of use of a home lipstick lead test kit
    Patent number: 9404907
    Abstract: Lipsticks are tested by a lead indicator solution. A lipstick is swiped across a sheet of wax paper, forming a lipstick sample. The test solution is applied, in droplet form, to the sample of lipstick, and allowed to sit for a period of time so a chemical change can occur in the solution, if there is lead present in the lipstick. A cotton swab is used to absorb the solution, and the tip of the swab picks up a bit of the lipstick sample. A color change is observed in the solution on the swab if lead is present in the lipstick. The amount of lead is determined by what color the solution changes to.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: August 2, 2016
    Inventor: Katherine DuRussel
  • Components and Method of Use of a Home Lipstick Lead Test Kit
    Publication number: 20150233886
    Abstract: Lipsticks are tested by a lead indicator solution. A lipstick is swiped across a sheet of wax paper, forming a lipstick sample. The test solution is applied, in droplet form, to the sample of lipstick, and allowed to sit for a period of time so a chemical change can occur in the solution, if there is lead present in the lipstick. A cotton swab is used to absorb the solution, and the tip of the swab picks up a bit of the lipstick sample. A color change is observed in the solution on the swab if lead is present in the lipstick. The amount of lead is determined by what color the solution changes to.
    Type: Application
    Filed: February 19, 2014
    Publication date: August 20, 2015
    Inventor: Katherine DuRussel