Patents by Inventor Colleen M. Griffith

Colleen M. Griffith 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).

  • Fluorescent lamp having ultraviolet reflecting layer
    Patent number: 6952081
    Abstract: A fluorescent lamp with an ultraviolet reflecting barrier layer between the glass envelope and the phosphor layer(s). The barrier layer is a blend of gamma alumina, alpha alumina and theta alumina, such as 5–80 weight percent gamma alumina, 5–80 weight percent alpha alumina, and 5–80 weight percent theta alumina.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: October 4, 2005
    Assignee: General Electric Company
    Inventors: Jon B. Jansma, Colleen M. Griffith
  • Protein adsorption by very dense porous zirconium oxide particles in expanded beds
    Patent number: 6036861
    Abstract: Porous Zirconia particles of specific gravity of 2.5-3.5 g/cm.sup.3 and mean particle sizes of 30-400 .mu.m can be synthesized using oil emulsion methods from colloids and used for protein adsorption in stable expanded beds. Expanded beds of less than 1.0 settled bed height to diameter (approximately 10 ml bed volume) are stable at linear fluid velocities of at least about 100 cm/hour.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: March 14, 2000
    Assignee: Regents of the University of Minnesota
    Inventors: Michael C. Flickinger, Michael J. Robichaud, John E. Morris, Colleen M. Griffith, Michael J. Annen, Peter W. Carr, Christopher Dunlap
  • Protein adsorption by very dense porous zirconium oxide particles in expanded beds
    Patent number: 5837826
    Abstract: Porous zirconia particles of specific gravity of 2.5-3.5 g/cm.sup.3 and mean particle sizes of 30-400 .mu.m can be synthesized using oil emulsion methods from colloids and used for protein adsorption in stable expanded beds. Expanded beds of less than 1.0 settled bed height to diameter (approximately 10 ml bed volume) are stable at linear fluid velocities of at least about 100 cm/hour.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: November 17, 1998
    Assignee: Regents of The University of Minnesota
    Inventors: Michael C. Flickinger, Michael J. Robichaud, John E. Morris, Colleen M. Griffith, Michael J. Annen, Peter W. Carr, Christopher Dunlap