Patents by Inventor Drow O'Young

Drow O'Young 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).

  • System and method of producing bisphenol-A (BPA) using two stage crystallization
    Publication number: 20050075520
    Abstract: A system and method are provided wherein the phase equilibrium of a system comprised of Phenol, Bisphenol-A and a solvent mixture comprising Acetone and Water is selectively controlled such that either crystalline Bisphenol-A, or an adduct of Bisphenol-A and Phenol is crystallized from the product solution. The present invention provides for the recovery of pure Bisphenol-A (BPA) by direct crystallization from solution.
    Type: Application
    Filed: September 17, 2003
    Publication date: April 7, 2005
    Inventors: Drow O'Young, Shan Hsieh, Vaibhav Kelkar