Patents Represented by Attorney, Agent or Law Firm Eric Middlemas
  • Patent number: 6767972
    Abstract: The invention provides a biodegradable polymer composition comprising a biodegradable polymer and a phenol-containing compound mixed with the polymer. The phenol-containing compound is present in the biodegradable polymer at an amount sufficient to slow the degradation rate of the biodegradable polymer. The invention also pertains to a method for slowing the degradation rate of a biodegradable polymer.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: July 27, 2004
    Assignee: Eastman Chemical Company
    Inventors: Gether Irick, Jr., Ronald Richard Light
  • Patent number: 6670505
    Abstract: A process for recovering a desired organic acid from a solution includes the steps of: providing an aqueous solution including at least one desired organic acid or its acid anion; adjusting the proton concentration in the aqueous solution to a desired level, with the desired proton concentration being selected, at least in part, by the amount of available protons needed to associate with the acid anions of the desired organic acid(s) to be recovered and/or acid anions that are weaker than the desired organic acids; and recovering at least a portion of the at least one desired organic acid from the aqueous phase. The desired proton concentration can be based on the amount of available protons being greater than, less than or substantially equal, to the amount of protons needed to associate with the anion of the desired organic acid(s) and acid anions that are weaker than the desired organic acid(s).
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: December 30, 2003
    Assignee: Eastman Chemical Company
    Inventors: Nick Allen Collins, Mark Robert Shelton, George William Tindall, Steven Thomas Perri, Ruairi Seosamh O'Meadhra, Chester Wayne Sink, Bhaskar Krishna Arumugam, John Clark Hubbs