Patents by Inventor Robert Hugh Schwartz

Robert Hugh Schwartz 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).

  • Process for cleaning reactors
    Publication number: 20040255980
    Abstract: This invention relates to a process for cleaning reactors. The process utilizes a solvent fed from multiple pressure sources to clean reactors of residual polymers. The reactors are equipped with agitators and stationary nozzles aimed at the agitator blades. The agitator is rotated during cleaning. The process may also utilize heated aqueous base to clean heat exchangers in external loops. In one aspect, a mixture of at least one organic solvent and aqueous base are utilized to clean certain reactors.
    Type: Application
    Filed: March 3, 2004
    Publication date: December 23, 2004
    Inventors: Spencer Wayne Bruce, James Kent Carpenter, Jeanine Lee Hurry, Joseph Richard Povernick, Frank Randolph Robertson, Robert Hugh Schwartz, Richard Shu-Hua Wu
  • Process for cleaning reactors
    Patent number: 6722377
    Abstract: This invention relates to a process for cleaning reactors. The process utilizes a solvent fed from multiple pressure sources to clean reactors of residual polymers. The reactors are equipped with agitators and stationary nozzles aimed at the agitator blades. The agitator is rotated during cleaning. The process may also utilize heated aqueous base to clean heat exchangers in external loops. In one aspect, a mixture of at least one organic solvent and aqueous base are utilized to clean certain reactors.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: April 20, 2004
    Assignee: Rohm and Haas Company
    Inventors: Spencer Wayne Bruce, James Kent Carpenter, Jeanine Lee Hurry, Joseph Richard Povernick, Frank Randolph Robertson, III, Robert Hugh Schwartz, Richard Shu-Hua Wu
  • Process for preparing polymers
    Patent number: 6320000
    Abstract: A process for preparing polymers is disclosed. The process utilizes displacement of air in a polymerization reactor with water vapor, a closed system, and a pump at high operating pressure to pump the polymer through a heat exchanger in an external loop, resulting in reduced volatile organic compound emissions.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: November 20, 2001
    Inventors: Jeanine Lee Hurry, Robert Hugh Schwartz, Richard Shu-Hua Wu