Patents by Inventor Robert Michael Mason

Robert Michael Mason 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).

  • High capacity purification of thermally unstable compounds
    Patent number: 7326323
    Abstract: Separations processes and apparati capable of purifying thermally sensitive materials at high capacity. An apparatus having a rectification section and a stripping section with the stripping section having a stripping tray with 5 to 50% open area, a pressure drop from 0.02 psi to 0.2 psi and a tray efficiency during operation of the column which is equal to or greater than 20%.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: February 5, 2008
    Assignee: Rohm and Haas Company
    Inventors: Robert Michael Mason, Jeffery Alan Goodwin, Ronald Drew Myers, Michael Stanley DeCourcy
  • Method for inhibiting polymerization of (METH) acrylic acid and its esters using an inhibitor and a process for making a compound useful as such an inhibitor
    Patent number: 7253279
    Abstract: This invention relates to a method for inhibiting polymerization of (meth)acrylic acid and its esters using a polymerization inhibitor which comprises at least one reduced halide-content azine dye-based compound. A process for producing reduced halide-content azine dye-based compounds using ion exchange resin technology is also provided.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: August 7, 2007
    Assignee: Rohm and Haas Company
    Inventors: Stephen Bass, Robert Michael Mason, Joy Lyndon Mendoza, Steven John Skoog, Mark T. Vandersall
  • Method for inhibiting polymerization of (meth)acrylic acid and its esters using an inhibitor and a process for making a compound useful as such an inhibitor
    Patent number: 7220879
    Abstract: This invention relates to a method for inhibiting polymerization of (meth)acrylic acid and its esters using a polymerization inhibitor which comprises at least one reduced halide-content azine dye-based compound. A process for producing reduced halide-content azine dye-based compounds using ion exchange resin technology is also provided.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: May 22, 2007
    Assignee: Rohm and Haas Company
    Inventors: Stephen Bass, Robert Michael Mason, Joy Lyndon Mendoza, Steven John Skoog, Mark T. Vandersall
  • High capacity purification of thermally unstable compounds
    Publication number: 20040104108
    Abstract: Separations processes and apparati capable of purifying thermally sensitive materials at high capacity. An apparatus having a rectification section and a stripping section with the stripping section having a stripping tray with 5 to 50% open area, a pressure drop from 0.02 psi to 0.2 psi and a tray efficiency during operation of the column which is equal to or greater than 20%.
    Type: Application
    Filed: December 3, 2002
    Publication date: June 3, 2004
    Inventors: Robert Michael Mason, Jeffrey Alan Goodwin, Ronald Drew Myers, Michael Stanley DeCourcy
  • Process for preparing (meth) acrylic acid
    Patent number: 6500982
    Abstract: This invention relates to a process for preparing (meth)acrylic acid, whereby turndown control is utilized to maintain optimal distillation column performance in the dehydration of aqueous (meth)acrylic acid to provide a (meth)acrylic acid solution.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: December 31, 2002
    Assignee: Rohm and Haas Company
    Inventors: Timothy Allen Hale, Robert Michael Mason, Josefina Tseng Chapman, James Clarence Day, Chorng-Shyuan Tsay
  • Process for preparing (meth)acrylic acid
    Patent number: 6399817
    Abstract: This invention relates to a process for preparing acrylic acid which utilizes an aqueous stream which includes recycled wastewater, at least part of which is stripped of undesirable components in a stripping column prior to being recycled to an acrylic acid absorber.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: June 4, 2002
    Assignee: Rohm and Haas Company
    Inventors: Josefina Tseng Chapman, James Clarence Day, Donald Alan Ebert, Thomas Albert Kaminski, Robert Michael Mason, Chorng-Shyuan Tsay
  • Process for pure grade acrylic acid
    Patent number: 5759358
    Abstract: Processes are provided for producing a pure grade of acrylic acid having residual aldehyde levels under 10 parts per million. The processes apply selected groups of amines sequentially and, preferably, continuously in selectively reducing, for example, acrolein and furfural, and may be advantageously conducted in the presence of maleic acid and maleic anhydride impurities.
    Type: Grant
    Filed: October 27, 1995
    Date of Patent: June 2, 1998
    Assignee: Rohm and Haas Company
    Inventors: William Bauer, Jr., Timothy Allen Hale, Robert Michael Mason, Rita Karina Upmacis, Lori Marie Petrovich
  • Process for pure grade acrylic acid
    Patent number: 5746892
    Abstract: A continuous process for producing a pure grade of acrylic acid having residual aldehyde levels under 10 parts per million. The process applies two groups of amines sequentially and continuously in selectively reducing acrolein and furfural and may be advantageously conducted in the presence of maleic acid and maleic anhydride impurities.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: May 5, 1998
    Assignee: Rohm and Haas Company
    Inventors: William Bauer, Jr., Timothy Allen Hale, Robert Michael Mason, Rita Karina Upmacis