Patents Assigned to Leonard Pearlstein
  • Method of making high performance superabsorbent material
    Patent number: 5849816
    Abstract: A high performance absorbent particulate composition and a method of preparation in which a non-colloidal solid filler core is substantially encapsulated within a layer of hydrogel forming polymer is disclosed. Also disclosed are absorbent devices using the high performance absorbent particulate composition and methods of making these devices.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: December 15, 1998
    Assignee: Leonard Pearlstein
    Inventors: Stuart P. Suskind, Leonard Pearlstein
  • Compostable packaging for containment of liquids
    Patent number: 5736204
    Abstract: A compostable paperboard container and package for liquids which is coated with a material capable of degrading to carbon dioxide, water and biomass under composting conditions.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: April 7, 1998
    Assignee: The Estate of Leonard Pearlstein
    Inventor: Stuart P. Suskind
  • High performance absorbent particles and methods of preparation
    Patent number: 5549590
    Abstract: A high performance absorbent particulate composition and a method of preparation in which non-colloidal solid filler core is substantially encapsulated within a bounding layer of hydrogel forming polymer is disclosed. In preferred embodiments, the size of the solid filler core is about 10 to about 1500 microns contributing about 20% to about 90% by weight of the composition. The particles of the present invention provide rapid absorption of a large volume of aqueous fluids. A wide range of performance properties are achieved through selection of the filler core and the polymer.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: August 27, 1996
    Assignee: Leonard Pearlstein
    Inventors: Stuart Suskind, Leonard Pearlstein
  • Degradable package for containment of liquids
    Patent number: 5540962
    Abstract: A compostable paperboard container and package for liquids is coated with a polymeric material capable of degrading under composting conditions and subsequently in the presence of light to form carbon dioxide, water, and biomass.
    Type: Grant
    Filed: April 6, 1994
    Date of Patent: July 30, 1996
    Assignee: Leonard Pearlstein
    Inventor: Stuart P. Suskind
  • High performance absorbent particles and methods of preparation
    Patent number: 5539019
    Abstract: A high performance absorbent particulate composition and a method of preparation in which non-colloidal solid filler core is substantially encapsulated within a bounding layer of hydrogel forming polymer is disclosed. In preferred embodiments, the size of the solid filler core is about 10 to about 1500 microns contributing about 20% to about 90% by weight of the composition. The particles of the present invention provide rapid absorption of a large volume of aqueous fluids. A wide range of performance properties are achieved through selection of the filler core and the polymer.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: July 23, 1996
    Assignee: Leonard Pearlstein
    Inventors: Stuart Suskind, Leonard Pearlstein
  • Compostable packaging for containment of liquids
    Patent number: 5458933
    Abstract: A compostable paperboard container and package for liquids which is coated with a material capable of degrading to carbon dioxide, water and biomass under composting conditions.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: October 17, 1995
    Assignee: Leonard Pearlstein
    Inventor: Stuart P. Suskind
  • Disposable container for moist paper towels and a method of making the same
    Patent number: 5409747
    Abstract: A biodegradable paperboard container having an inner moisture resistant barrier coating for storing moist towels and a method for producing the container and moist towels.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: April 25, 1995
    Assignee: Leonard Pearlstein
    Inventors: Leonard Pearlstein, Stuart P. Suskind
  • Disposable container for moist paper towels the same
    Patent number: 5286538
    Abstract: A biodegradable paperboard container having an inner moisture resistant barrier coating for storing moist towels.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: February 15, 1994
    Assignee: Leonard Pearlstein
    Inventors: Leonard Pearlstein, Stuart P. Suskind