Patents by Inventor Qingping Chen

Qingping Chen 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).

  • Polyurethane based inks for writing instruments
    Publication number: 20030055127
    Abstract: A non-erasable ink composition suitable for use in writing instruments is described comprising an isocyanate free thermoplastic polyurethane resin, a colorant and an organic solvent. The ink composition may also include a second resin, plasticizers, antioxidants, corrosion inhibitors, lubricants, chemical dispersants, and surfactants. The inks of the present invention exhibit a smooth writing performance and non-seepage.
    Type: Application
    Filed: June 8, 2001
    Publication date: March 20, 2003
    Applicant: BIC Corporation
    Inventors: Qingping Chen, Michael Nowak
  • Fluorescent inks for writing instruments using fluorescent dyes and white pigments
    Patent number: 6517619
    Abstract: A non-aqueous fluorescent ink composition suitable for use in writing instruments is described comprising a soluble fluorescent colorant, a solvent, and an opacifying agent. The ink composition may also include resins, stabilizers, surfactants, lubricants and other inert additives. The fluorescent ink composition exhibits a brilliant appearance in masscolor and when written on paper.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: February 11, 2003
    Assignee: BIC Corporation
    Inventors: Michael T. Nowak, Qingping Chen
  • Solvent-based non-fluorescent ink for writing instruments based upon pigment dispersions in non-aqueous solvents
    Patent number: 6503965
    Abstract: A non-aqueous non-fluorescent ink composition suitable for use in writing instruments is described comprising a non-fluorescent pigment dispersion, a stabilizer and a high boiling point organic solvent. The ink composition may also include resins, plasticizers, antiskinning agents and lubricants.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: January 7, 2003
    Assignee: BIC Corporation
    Inventors: Michael T. Nowak, Qingping Chen
  • Solvent-based fluorescent inks for writing instruments based upon pigment dispersions in non-aqueous solvents
    Patent number: 6425948
    Abstract: A non-aqueous fluorescent ink composition suitable for use in writing instruments is described comprising a fluorescent pigment dispersion and a high boiling point organic solvent. The ink composition may also include resins, plasticizers, antiskinning agents, lubricants and stabilizers. The fluorescent ink composition exhibits a brilliant appearance in masscolor and when written on paper.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: July 30, 2002
    Assignee: BIC Corporation
    Inventors: Michael T. Nowak, Qingping Chen