Patents by Inventor Aileen R. Gibson

Aileen R. Gibson 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 employing magnesium hydroxide in peroxide bleaching of mechanical pulp
    Patent number: 7052578
    Abstract: Wood pulp is bleached using hydrogen peroxide as the oxidative bleaching agent in the presence of magnesium hydroxide or magnesium oxide. The bleaching process is carried out in the presence of magnesium hydroxide as the predominant, and preferably essential, source of alkali. The process optionally includes transition metal chelants, such as DTPA or EDTA in the bleaching slurry. The process eliminates the need for added caustic and silicate in such systems and can be carried out at or near neutral pH of 5.0 to 8.5.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: May 30, 2006
    Assignee: Martin Marietta Magnesia Specialties, Inc.
    Inventors: Mark T. Wajer, Aileen R. Gibson, Joseph Genco, Donna Johnson, Burton Branch
  • Process employing magnesium hydroxide in peroxide bleaching of mechanical pulp
    Publication number: 20010050153
    Abstract: Wood pulp is bleached using hydrogen peroxide as the oxidative bleaching agent in the presence of magnesium hydroxide or magnesium oxide. The bleaching process is carried out in the presence of magnesium hydroxide as the predominant, and preferably essential, source of alkali. The process optionally includes transition metal chelants, such as DTPA or EDTA in the bleaching slurry. The process eliminates the need for added caustic and silicate in such systems and can be carried out at or near neutral pH of 5.0 to 8.5.
    Type: Application
    Filed: January 26, 2001
    Publication date: December 13, 2001
    Inventors: Mark T. Wajer, Aileen R. Gibson, Joseph Genco, Donna A. Johnson, Burton Branch