Patents by Inventor Alan Bart Levy

Alan Bart Levy 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).

  • Process for depolymerizing nylon-containing waste to form caprolactam
    Patent number: 6342555
    Abstract: The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-polycaprolactam components to form caprolactam comprises the step of: in the absence of added catalyst, contacting the multi-component waste material with superheated steam at a temperature of about 250° C. to about 400° C. and at a pressure within the range of about 1 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: January 29, 2002
    Assignee: AlliedSignal Inc.
    Inventors: Stylianos Sifniades, Alan Bart Levy, Jan Agnes Jozef Hendrix
  • Process for depolymerizing nylon-containing waste to form caprolactam
    Publication number: 20010001792
    Abstract: The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-polycaprolactam components to form caprolactam comprises the step of: in the absence of added catalyst, contacting the multi-component waste material with superheated steam at a temperature of about 250° C. to about 400° C. and at a pressure within the range of about 1 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed.
    Type: Application
    Filed: January 12, 2001
    Publication date: May 24, 2001
    Applicant: AlliedSignal
    Inventors: Stylianos Sifniades, Alan Bart Levy, Jan Agnes Jozef Hendrix
  • Process for depolymerizing polycaprolactam processing waste to form caprolactam
    Patent number: 5948908
    Abstract: The present invention provides an improved process for the recovery of caprolactam from polycaprolactam processing waste. The present process for depolymerizing polycaprolactam waste to form caprolactam comprises the step of: in the absence of added catalyst, contacting the polycaprolactam waste with superheated steam at a temperature of about 250.degree. C. to about 400.degree. C. and at a pressure within the range of about 1.5 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: September 7, 1999
    Assignee: AlliedSignal Inc.
    Inventors: Stylianos Sifniades, Alan Bart Levy
  • Process for depolymerizing nylon-containing waste to form caprolactam
    Patent number: 5932724
    Abstract: The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-polycaprolactam components to form caprolactam comprises the step of: in the absence of added catalyst, contacting the multi-component waste material with superheated steam at a temperature of about 250.degree. C. to about 400.degree. C. and at a pressure within the range of about 1 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed. The formed caprolactam may then be used in the production of engineered resins and fibers.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: August 3, 1999
    Assignees: AlliedSignal Inc., DSM N.V.
    Inventors: Stylianos Sifniades, Alan Bart Levy, Jan Agnes Jozef Hendrix
  • Process for depolymerizing nylon-containing whole carpet to form caprolactam
    Patent number: 5929234
    Abstract: The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-polycaprolactam components to form caprolactam comprises the step of: in the absence of added catalyst, contacting the multi-component waste material with superheated steam at a temperature of about 250.degree. C. to about 400.degree. C. and at a pressure within the range of about 1 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed. The formed caprolactam may then be used in the production of engineered resins and fibers.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: July 27, 1999
    Assignees: AlliedSignal Inc., DSM N.V.
    Inventors: Stylianos Sifniades, Alan Bart Levy, Jan Agnes Jozef Hendrix
  • Process for depolymerizing polycaprolactam processing waste to form caprolactam
    Patent number: 5869654
    Abstract: The present invention provides an improved process for the recovery of caprolactam from polycaprolactam processing waste. The present process for depolymerizing polycaprolactam waste to form caprolactam comprises the step of: in the absence of added catalyst, contacting the polycaprolactam waste with superheated steam at a temperature of about 250.degree. C. to about 400.degree. C. and at a pressure within the range of about 1.5 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed.The formed caprolactam may then be used in the production of engineered resins and fibers.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: February 9, 1999
    Assignee: AlliedSignal Inc.
    Inventors: Stylianos Sifniades, Alan Bart Levy
  • Process for depolymerizing nylon-containing waste to form caprolactam
    Patent number: 5681952
    Abstract: The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-polycaprolactam components to form caprolactam comprises the step of: in the absence of added catalyst, contacting the multi-component waste material with superheated steam at a temperature of about 250.degree. C. to about 400.degree. C. and at a pressure within the range of about 1 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam- containing vapor stream is formed.The formed caprolactam may then be used in the production of engineered resins and fibers.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: October 28, 1997
    Assignees: AlliedSignal Inc., DSM N.V.
    Inventors: Stylianos Sifniades, Alan Bart Levy, Jan Agnes Jozef Hendrix