Patents by Inventor David N. Samuel

David N. Samuel 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).

  • Container closures, sealed containers and sealing compositions for them
    Patent number: 5430098
    Abstract: A sealing composition for a container closure comprises a polymeric matrix material and its oxygen permeability is reduced by incorporating ethylene vinyl alcohol polymer into the composition. The composition can be in fluid or meltable form ready for application to a closure or it can be present as a deposit on the closure, for instance a gasket around the closure.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: July 4, 1995
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David N. Samuel, Richard S. Williams
  • Container closures, sealed containers and sealing compositions for them
    Patent number: 5362531
    Abstract: A sealing composition for a container closure comprises a polymeric matrix material and its oxygen permeability is reduced by incorporating ethylene vinyl alcohol polymer into the composition. The composition can be in fluid or meltable form ready for application to a closure or it can be present as a deposit on the closure, for instance a gasket around the closure.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: November 8, 1994
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David N. Samuel, Richard S. Williams
  • Container closures, sealed containers and sealing compositions for them
    Patent number: 5186991
    Abstract: A sealing composition for a container closure comprises a polymeric matrix material and its oxygen permeability is reduced by incorporating ethylene vinyl alcohol polymer into the composition. The composition can be in fluid or meltable form ready for application to a closure or it can be present as a deposit on the closure, for instance a gasket around the closure.
    Type: Grant
    Filed: June 7, 1991
    Date of Patent: February 16, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David N. Samuel, Richard S. Williams
  • Container closures, sealed containers and sealing compositions for them
    Patent number: 5183848
    Abstract: A sealing composition for a container closure comprises a polymeric matrix material and its oxygen permeability is reduced by incorporating ethylene vinyl alcohol polymer into the composition. The composition can be in fluid or meltable form ready for application to a closure or it can be present as a deposit on the closure, for instance a gasket around the closure.
    Type: Grant
    Filed: June 7, 1991
    Date of Patent: February 2, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David N. Samuel, Richard S. Williams
  • Container closures and sealed containers
    Patent number: 5045594
    Abstract: A preformed container closure element, preferably a cap, is formed of a polymeric matrix containing an ethylene vinyl alcohol polymer to reduce oxygen permeability of the cap. The cap is of special value for sealing filled jars or bottles, especially of glass, wherein the filling is beer.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: September 3, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David N. Samuel, Richard S. Williams
  • Sealing compositions
    Patent number: 4368828
    Abstract: Glass beads having a particle size of 1 to 200 microns are included as part or all of the filler in a sealing composition suitable for sealing container ends and which is made by dispersing a filler in a latex of a styrene butadiene or other rubbery polymer, optionally also containing a tackifying resin.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: January 18, 1983
    Assignee: W. R. Grace & Co.
    Inventors: David N. Samuel, Kenneth M. Sinnott
  • Sealing compositions
    Patent number: 4360120
    Abstract: Glass beads having a particle size of 1 to 200 microns are included as part or all of the filler in a sealing composition suitable for sealing container ends and which may be made by dispersing or dissolving solid styrene butadiene or other rubbery polymer and filler, and optionally also containing a tackifying resin, in a liquid medium.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: November 23, 1982
    Assignee: W. R. Grace & Co.
    Inventors: David N. Samuel, Kenneth M. Sinnott