Patents by Inventor Chengwu Li

Chengwu Li 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).

  • Liposome and personal care composition comprising thereof
    Patent number: 9254276
    Abstract: A liposome comprising a phospholipid, a hydrophobic active comprising a carboxylate group, and a component selected from a group consisting of: a hydrophilic adjuvant comprising a positively charged group, a complex of said hydrophobic active with said hydrophilic adjuvant, and combinations thereof. An aqueous liposome dispersion comprising the liposome, and a personal care composition comprising the liposome. A process of preparing the liposome, comprising the steps of: forming a premix by dissolving a phospholipid, a hydrophobic active comprising a carboxylate group in an organic solvent; evaporating off said organic solvent from the premix to form a phospholipid film; and hydrating said lipid film with a hydration medium comprising a hydrophilic adjuvant comprising a positively charged group and homogenize the medium to form an aqueous liposome dispersion.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: February 9, 2016
    Assignee: The Procter & Gamble Company
    Inventors: Chengwu Li, Naohisa Yoshimi, Xincheng Hu, Shuang Li, Yunhua Gao
  • Liposome and Personal Care Composition Comprising Thereof
    Publication number: 20120189678
    Abstract: A liposome comprising a phospholipid, a hydrophobic active comprising a carboxylate group, and a component selected from a group consisting of: a hydrophilic adjuvant comprising a positively charged group, a complex of said hydrophobic active with said hydrophilic adjuvant, and combinations thereof. An aqueous liposome dispersion comprising the liposome, and a personal care composition comprising the liposome. A process of preparing the liposome, comprising the steps of: forming a premix by dissolving a phospholipid, a hydrophobic active comprising a carboxylate group in an organic solvent; evaporating off said organic solvent from the premix to form a phospholipid film; and hydrating said lipid film with a hydration medium comprising a hydrophilic adjuvant comprising a positively charged group and homogenize the medium to form an aqueous liposome dispersion.
    Type: Application
    Filed: January 25, 2012
    Publication date: July 26, 2012
    Inventors: Chengwu LI, Naohisa Yoshimi, Xincheng Hu, Shuang Li, Yunhua Gao
  • Transparent Cosmetic Compositions
    Publication number: 20110105406
    Abstract: The present invention relates to a cosmetic composition comprising: a) from about 0.05% to about 10% of a salt form active; b) from about 0.001% to about 2% of a thickening agent; and c) water, wherein the composition has a turbidity no higher than about 10 NTU, and has a pH in the range of about 5.0 to about 6.8.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 5, 2011
    Applicant: The Proctor & Gamble Company
    Inventors: Chengwu Li, Xincheng Hu