Patents by Inventor David W. Weaver

David W. Weaver 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).

  • Publication number: 20240166825
    Abstract: The disclosed technology concerns a method for wetting and dispersing a pulverulent polycarboxylic acid containing polymer in aqueous media without the need of a steric stabilizer and/or a wetting agent, said method comprises a) providing a pulverulent pre-neutralized carboxylic acid containing polymer or copolymer, wherein said polymer or copolymer is prepared from a monomer mixture comprising at least one olefinically unsaturated carboxylic acid group containing monomer, and wherein from about 1 to about 10 wt. % of said carboxylic acid group containing monomer(s) is neutralized; b) mixing said pulverulent pre-neutralized carboxylic acid containing polymer or copolymer in aqueous medium; and c) mixing a deswelling agent selected from an acid, a salt, and combinations thereof with said aqueous medium, and optionally d), adjusting the pH.
    Type: Application
    Filed: March 4, 2022
    Publication date: May 23, 2024
    Applicant: Lubrizol Advanced Materials, Inc.
    Inventors: Sinan Li, David W. Weaver, Di Shen, Ge Yao, Jingjuan Qi, Samuel T. Williams, Michael Knopf
  • Publication number: 20220304936
    Abstract: An amorphous solid dispersion includes a linear poly(acrylic acid) and an active pharmaceutical ingredient. The linear poly(acrylic acid) used to form the amorphous solid dispersion has a Brookfield viscosity of at least 100 cP at 25° C. A method of forming such an amorphous solid dispersion of an active pharmaceutical ingredient includes forming a liquid dispersion of a linear poly(acrylic acid), an active pharmaceutical ingredient, and a solvent system, the linear poly(acrylic acid) having a Brookfield viscosity at 25° C. of at least 100 cP and evaporating the solvent system from the liquid dispersion to form an amorphous solid dispersion.
    Type: Application
    Filed: August 28, 2020
    Publication date: September 29, 2022
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Elena S. Draganoiu, Barbara J. Morgan, David W. Weaver, Shreya P. Shah, Todd J. Wilson, Michael Grieco, Cynthia S. Randall, Kimberly A. Zubris, Mark A. Mitchnick, Liliana A. Miinea