Patents by Inventor David M. Shulman

David M. Shulman 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).

  • Synthetic aggregate and method of producing the same
    Patent number: 6638355
    Abstract: A synthetic aggregate having a multiplicity of uses such as for mixing with a cementing material to form concrete, mortar or plaster is disclosed. The aggregate includes crushed fragments of a size which are capable of passing through mesh screen having sieve openings ranging from between about 19 mm and 75 microns. The aggregate fragments are made by curing and then crushing a compressed product. The compressed product is made by compressing an aqueous cementitious mixture comprising cement and at least one member selected from the group consisting of bottom ash and non-cementitious fly ash. The compressed product is cured so that it has a compressive strength of at least 600 psi.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: October 28, 2003
    Inventor: David M. Shulman
  • SYNTHETIC AGGREGATE AND METHOD OF PRODUCING THE SAME
    Publication number: 20030109592
    Abstract: A synthetic aggregate having a multiplicity of uses such as for mixing with a cementing material to form concrete, mortar or plaster is disclosed. The aggregate includes crushed fragments of a size which are capable of passing through mesh screen having sieve openings ranging from between about 19 mm and 75 microns. The aggregate fragments are made by curing and then crushing a compressed product. The compressed product is made by compressing an aqueous cementitious mixture comprising cement and at least one member selected from the group consisting of bottom ash and non-cementitious fly ash. The compressed product is cured so that it has a compressive strength of at least 600 psi.
    Type: Application
    Filed: January 17, 2003
    Publication date: June 12, 2003
    Inventor: David M. Shulman
  • Synthetic aggregate and method of producing the same
    Patent number: 6528547
    Abstract: A synthetic aggregate having a multiplicity of uses such as for mixing with a cementing material to form concrete, mortar or plaster is disclosed. The aggregate includes crushed fragments of a size which are capable of passing through mesh screen having sieve openings ranging from between about 19 mm and 75 microns. The aggregate fragments are made by curing and then crushing a compressed product. The compressed product is made by compressing an aqueous cementitious mixture comprising cement and at least one member selected from the group consisting of bottom ash and non-cementitious fly ash. The compressed product is cured so that it has a compressive strength of at least 600 psi.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: March 4, 2003
    Inventor: David M. Shulman
  • Synthetic aggregate and method of producing the same
    Publication number: 20010049404
    Abstract: A synthetic aggregate having a multiplicity of uses such as for mixing with a cementing material to form concrete, mortar or plaster is disclosed. The aggregate includes crushed fragments of a size which are capable of passing through mesh screen having sieve openings ranging from between about 19 mm and 75 microns. The aggregate fragments are made by curing and then crushing a compressed product. The compressed product is made by compressing an aqueous cementitious mixture comprising cement and at least one member selected from the group consisting of bottom ash and non-cementitious fly ash. The compressed product is cured so that it has a compressive strength of at least 600 psi.
    Type: Application
    Filed: July 18, 2001
    Publication date: December 6, 2001
    Inventor: David M. Shulman
  • Lightweight, low water content expanded shale, clay and slate cementitious compositions and methods of their production and use
    Patent number: 5725652
    Abstract: An improved lightweight cementitious product made up of an aqueous cementious mixture using cement and expanded shale, clay and slate mix, that can incorporate fly ash, lime, and the weight saving component, which is micronized polystyrene particles having particle sizes in the range of 50 to 2000 microns, and characterized by having water contents in the range of from about 0.5% to 50% v/v. The ultra low water compositions can be extruded and can be molded under high pressure.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: March 10, 1998
    Inventor: David M. Shulman
  • Lightweight, low water content cementitious compositions and methods of their production and use
    Patent number: 5622556
    Abstract: An improved lightweight cementitious product made up of an aqueous cementious mixture that can incorporate fly ash, portland cement, sand, lime, and the weight saving component, which is micronized polystyrene particles having particle sizes in the range of 50 to 2000 microns, and characterized by having very low water contents, in the range of from about 0.5% to 5% v/v. The ultra low water compositions can be extruded and can be molded under high pressure.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: April 22, 1997
    Inventor: David M. Shulman
  • Lightweight cementitious compositions and methods of their production and use
    Patent number: 5580378
    Abstract: An improved lightweight cementitious product made up of an aqueous cementitious mixture that can incorporate fly ash, portland cement, sand, lime, and the weight saving component, which is micronized polystyrene particles having particle sizes in the range of 50 to 2000 microns. The final mix can be poured into molded products such as foundation walls, roof tiles, bricks and the like. The product can also be used as a mason's mortar, a plaster, a stucco or a texture.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: December 3, 1996
    Inventor: David M. Shulman