Patents by Inventor Mayis Seapan

Mayis Seapan 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).

  • Method to extend the utilization of a catalyst in a multistage reactor system
    Publication number: 20060070918
    Abstract: The invention provides a method to extend the utilization of a catalyst in a multistage reaction system, provided that a primary reaction and a secondary (or more) catalyst-poisoning reaction occur on the same catalyst, and the rate of the secondary (or more), catalyst-poisoning reaction is faster than the rate of the primary reaction.
    Type: Application
    Filed: April 29, 2005
    Publication date: April 6, 2006
    Inventors: Mayis Seapan, George Diffendall
  • Purification of biochemically derived 1,3-propanediol
    Publication number: 20050277792
    Abstract: The invention discloses a hydrogenation process for removing impurities and controlling acid for use in downstream processing of biochemically-derived 1,3-propanediol. Preferably, the biochemically-derived 1,3-propanediol, before the contacting, has an initial color and, after the contracting, has a color that is lower than the initial color.
    Type: Application
    Filed: August 12, 2005
    Publication date: December 15, 2005
    Inventors: Mayis Seapan, George Diffendall, Robert Trotter, Tyler Ames, F. Gallagher
  • Purification of chemical 1,3-propanediol
    Publication number: 20050272962
    Abstract: Disclosed is a process comprising contacting chemical 1,3-propanediol with hydrogen in the presence of a hydrogenation catalyst. Preferably, the chemical 1,3-propanediol, before the contacting has an initial color and, after the contacting, has a color that is lower than the initial color.
    Type: Application
    Filed: August 12, 2005
    Publication date: December 8, 2005
    Inventors: Hari Sunkara, Mayis Seapan, George Diffendall, Tyler Ames
  • Purification of biologically-produced 1,3-propanediol
    Publication number: 20050069997
    Abstract: A process for purifying 1,3-propanediol from the fermentation broth of a cultured E. coli that has been bioengineered to synthesize 1,3-propanediol from sugar is provided. The basic process entails filtration, ion exchange and distillation of the fermentation broth product stream, preferably including chemical reduction of the product during the distillation procedure. Also provided are highly purified compositions of 1,3-propanediol.
    Type: Application
    Filed: May 5, 2004
    Publication date: March 31, 2005
    Inventors: Dennis Adkesson, Albert Alsop, Tyler Ames, Luis Chu, James Disney, Bryan Dravis, Patrick Fitzgibbon, James Gaddy, F. Gallagher, William Lehnhardt, Jefferson Lievense, Michael Luyben, Mayis Seapan, Robert Trotter, Gregory Wenndt, Eugene Yu
  • Hydrogenation of biochemical derived 1,3 -propanediol
    Publication number: 20040260125
    Abstract: The invention discloses a hydrogenation process for removing impurities and controlling acid for use in downstream processing of biochemically-derived 1,3-propanediol. Preferably, the biochemically-derived 1,3-propanediol, before the contacting, has an initial color and, after the contracting, has a color that is lower than the initial color.
    Type: Application
    Filed: May 5, 2004
    Publication date: December 23, 2004
    Inventors: Mayis Seapan, George F. Diffendall, Robert E. Trotter, Tyler T. Ames, F. Glenn Gallagher
  • Hydrogenation of chemically derived 1,3-propanediol
    Publication number: 20040225161
    Abstract: Disclosed is a process comprising contacting chemical 1,3-propanediol with hydrogen in the presence of a hydrogenation catalyst. Preferably, the chemical 1,3-propanediol, before the contacting has an initial color and, after the contacting, has a color that is lower than the initial color.
    Type: Application
    Filed: August 5, 2003
    Publication date: November 11, 2004
    Inventors: Hari Babu Sunkara, Mayis Seapan, George F. Diffendall, Tyler T. Ames
  • Hydrogenation of polytrimethylene ether glycol
    Publication number: 20040225163
    Abstract: A process comprising contacting PO3G having color with hydrogen in the presence of a hydrogenation catalyst, wherein the PO3G, after hydrogenation, has a APHA color of less than about 50.
    Type: Application
    Filed: August 5, 2003
    Publication date: November 11, 2004
    Inventors: Hari Babu Sunkara, Mayis Seapan, George F. Diffendall, Francis G. Gallagher