Patents by Inventor Fred Keller, Jr.

Fred Keller, Jr. 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).

  • Pentose fermentation of normally toxic lignocellulose prehydrolysate with strain of Pichia stipitis yeast using air
    Patent number: 6498029
    Abstract: Strains of the yeast Pichia stipitis NPw9 (ATCC PTA-3717) useful for the production of ethanol using oxygen for growth while fermenting normally toxic lignocellulosic prehydrolysates.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: December 24, 2002
    Assignee: Midwest Research Institute
    Inventors: Fred A. Keller, Jr., Quang A. Nguyen
  • Concrete building block assembly
    Patent number: 5881511
    Abstract: A concrete block is provided having half dovetail sections at opposite ends of the block arranged so that when placed together the dovetailed sections on adjoining blocks form a full dovetailed section which is just large enough to be received within a dovetail groove in the central portion of an adjacent identical block. The concrete blocks are provided with upper and lower longitudinal grooves for longitudinal members having the same exterior shape. In one form of the invention one side of the block may be made into a plant receptacle by providing a hollowed out section oriented upwardly. Insulating concrete blocks may also be combined with blocks formed of structural concrete to provide an interlocked wall having a portion of the wall made from insulated concrete material and another portion of the wall made from structural concrete material.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: March 16, 1999
    Inventor: Fred Keller, Jr.
  • Ceramic aggregate for roadway composition and method of producing same
    Patent number: 4873207
    Abstract: A ceramic aggregate for concrete is made from a mixture of clay and dried organic garbage in a ratio of about three parts by volume of organic garbage to about one part by volume clay. The mixture is shaped into pancake-shaped pellets and fired at a temperature in excess of the vitrification point of the clay to cause the surface of the pellets to melt and harden the pellets.
    Type: Grant
    Filed: May 3, 1988
    Date of Patent: October 10, 1989
    Inventor: Fred Keller, Jr.
  • Insulating ceramic building material and method with fired clay and garbage mixture
    Patent number: 4780433
    Abstract: A ceramic composition to make cement with insulating properties is a mixture of cement, ceramic grog and ceramic aggregate beads, the ceramic grog and aggregate being a mixture of clay and dried organic mulch. After firing, the resulting ceramic product is porous. When added to the cement, the porous ceramic grog and aggregate greatly enhance the insulation qualities of the resultant cement structure. The dried organic mulch is formed from pellets produced from commercially reclaimed garbage.
    Type: Grant
    Filed: January 13, 1988
    Date of Patent: October 25, 1988
    Inventor: Fred Keller, Jr.
  • Ceramic composition to make cement with insulating properties
    Patent number: 4740486
    Abstract: A composition for building blocks is a mixture of cement, ceramic grog and ceramic aggregate beads. The ceramic grog and aggregate are formed as a mixture of clay and dried organic mulch. After firing, the resulting ceramic product is porous. When added to the cement, the porous ceramic grog and aggregate greatly enhance the insulation qualities of the resultant cement structure.
    Type: Grant
    Filed: October 30, 1986
    Date of Patent: April 26, 1988
    Inventor: Fred Keller, Jr.
  • Handle for a writing instrument or the like
    Patent number: D292104
    Type: Grant
    Filed: July 14, 1983
    Date of Patent: September 29, 1987
    Inventor: Fred Keller, Jr.
  • Building block
    Patent number: D300862
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: April 25, 1989
    Inventor: Fred Keller, Jr.