Patents Assigned to LEXINGTON PHARMACEUTICALS LABORATORIES, LLC
  • Patent number: 9371349
    Abstract: Disclosed is a method of chlorinating a carbohydrate or derivative thereof, for example, a sucrose-6-ester at the 4,1?, and 6? positions, with irreversible removal of HCl formed during the reaction to form the chlorinated carbohydrate or derivative thereof, for example, a 4,1?,6?-trichloro-4,1?,6?-trideoxy-6-O-ester of galactosucrose (TGS-6E). The irreversible removal of HCl can be carried out by an irreversible physical process and/or an irreversible chemical process. Sucralose, an artificial sweetener, can be prepared by deesterification of the TGS-6E. The chlorination reaction takes place at low temperatures and the desired chlorinated product is obtained in high yields and in high purities.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: June 21, 2016
    Assignee: Lexington Pharmaceuticals Laboratories, LLC
    Inventors: William Randal Erickson, Stephen Craig Fields
  • Publication number: 20140221642
    Abstract: Disclosed is a method of chlorinating a carbohydrate or derivative thereof, for example, a sucrose-6-ester at the 4,1?, and 6? positions, with irreversible removal of HCl formed during the reaction to form the chlorinated carbohydrate or derivative thereof, for example, a 4,1?,6?-trichloro-4,1?,6?-trideoxy-6-O-ester of galactosucrose (TGS-6E). The irreversible removal of HCl can be carried out by an irreversible physical process and/or an irreversible chemical process. Sucralose, an artificial sweetener, can be prepared by deesterification of the TGS-6E. The chlorination reaction takes place at low temperatures and the desired chlorinated product is obtained in high yields and in high purities.
    Type: Application
    Filed: April 4, 2014
    Publication date: August 7, 2014
    Applicant: Lexington Pharmaceuticals Laboratories, LLC
    Inventors: William Randal Erickson, Stephen Craig Fields
  • Publication number: 20140187768
    Abstract: Disclosed is a method for chlorinating a carbohydrate or a derivative thereof to produce a polychlorinated carbohydrate or a derivative thereof, such as sucralose, the method involves (i) reacting the carbohydrate or derivative thereof with a chlorinating agent to obtain a reaction mixture comprising said polychlorinated carbohydrate or derivative thereof and at least one under-chlorinated carbohydrate or derivative thereof, (ii) returning the at least one under-chlorinated carbohydrate or derivative thereof to a chlorinating step and further chlorinating the at least one under-chlorinated carbohydrate or derivative thereof to obtain the desired polychlorinated carbohydrate or derivative thereof; and (iii) optionally repeating steps (i) and (ii) ā€œnā€ times where n?1. The polychlorinated carbohydrate or a derivative thereof is obtained in high yields.
    Type: Application
    Filed: March 5, 2014
    Publication date: July 3, 2014
    Applicant: Lexington Pharmaceuticals Laboratories, LLC
    Inventors: William Randal ERICKSON, Stephen Craig FIELDS
  • Patent number: 8729255
    Abstract: Disclosed is a method of chlorinating a carbohydrate or derivative thereof, for example, a sucrose-6-ester at the 4,1?, and 6? positions, with irreversible removal of HCl formed during the reaction to form the chlorinated carbohydrate or derivative thereof, for example, a 4,1?,6?-trichloro-4,1?,6?-trideoxy-6-O-ester of galactosucrose (TGS-6E). The irreversible removal of HCl can be carried out by an irreversible physical process and/or an irreversible chemical process. Sucralose, an artificial sweetener, can be prepared by deesterification of the TGS-6E. The chlorination reaction takes place at low temperatures and the desired chlorinated product is obtained in high yields and in high purities.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 20, 2014
    Assignee: Lexington Pharmaceuticals Laboratories, LLC
    Inventors: William Randal Erickson, Stephen Craig Fields
  • Patent number: 8691797
    Abstract: Disclosed is a method for chlorinating a carbohydrate or a derivative thereof to produce a polychlorinated carbohydrate or a derivative thereof, such as sucralose, the method involves (i) reacting the carbohydrate or derivative thereof with a chlorinating agent to obtain a reaction mixture comprising said polychlorinated carbohydrate or derivative thereof and at least one under-chlorinated carbohydrate or derivative thereof, (ii) returning the at least one under-chlorinated carbohydrate or derivative thereof to a chlorinating step and further chlorinating the at least one under-chlorinated carbohydrate or derivative thereof to obtain the desired polychlorinated carbohydrate or derivative thereof; and (iii) optionally repeating steps (i) and (ii) ā€œnā€ times where n?1. The polychlorinated carbohydrate or a derivative thereof is obtained in high yields.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 8, 2014
    Assignee: Lexington Pharmaceuticals Laboratories, LLC
    Inventors: William Randal Erickson, Stephen Craig Fields
  • Publication number: 20130226107
    Abstract: The present invention discloses a novel medicinal roller ball applicator, comprising a ball with a rough surface, which can relatively painlessly facilitate the application and therapeutic massage of an active ingredient into a sensitive infected area of tissue for prolonged periods of time, while simultaneously removing dead epidermal tissue, a proven harrier to adsorption and penetration of active ingredients to the desired lower living skin tissue.
    Type: Application
    Filed: February 27, 2013
    Publication date: August 29, 2013
    Applicant: Lexington Pharmaceuticals Laboratories, LLC
    Inventor: Lexington Pharmaceuticals Laboratories, LLC
  • Publication number: 20130197213
    Abstract: Disclosed is a method of chlorinating a carbohydrate or derivative thereof, for example, a sucrose-6-ester at the 4,1?, and 6? positions, with irreversible removal of HCl formed during the reaction to form the chlorinated carbohydrate or derivative thereof, for example, a 4,1?,6?-trichloro-4,1?,6?-trideoxy-6-O-ester of galactosucrose (TGS-6E). The irreversible removal of HCl can be carried out by an irreversible physical process and/or an irreversible chemical process. Sucralose, an artificial sweetener, can be prepared by deesterification of the TGS-6E. The chlorination reaction takes place at low temperatures and the desired chlorinated product is obtained in high yields and in high purities.
    Type: Application
    Filed: March 14, 2013
    Publication date: August 1, 2013
    Applicant: LEXINGTON PHARMACEUTICALS LABORATORIES, LLC
    Inventor: Lexington Pharmaceuticals Laboratories, LLC