Patents by Inventor Rachel A. Steven

Rachel A. Steven 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).

  • Publication number: 20080221078
    Abstract: The present invention discloses and claims a method of treating cognition deficits in a patient suffering from schizophrenia by administering to said patient a therapeutically effective amount of a CB1 receptor antagonist as described herein. In another aspect, this invention also discloses and claims a combination of one or more CB1 receptor antagonists and of one or more antipsychotic agents useful in the treatment of psychiatric disorders. The combination of this invention provides synergistic results in that the combination improves positive and negative symptoms of schizophrenia, weight gain and catalepsy.
    Type: Application
    Filed: May 22, 2008
    Publication date: September 11, 2008
    Applicant: AVENTIS PHARMACEUTICALS INC.
    Inventors: Mark BLACK, Beth BOROWSKY, Nancy ROGACKI, Yaw SENYAH, Rachel STEVENS
  • Publication number: 20060254092
    Abstract: A pad for providing anterior transverse arch support and a phlalanges grip for a human foot. The pad has an upper surface contoured or manufactured with specific materials to fit into the valley created by the formation of the anterior, transverse, arch.
    Type: Application
    Filed: May 12, 2005
    Publication date: November 16, 2006
    Inventor: Rachel Stevens
  • Patent number: 5559276
    Abstract: A method of producing 1,1,1,2-tetrafluoroethane in two separation reaction zones involving (1) reaction of trichloroethylene and hydrogen fluoride to produce 1,1,1-trifluoro-2-chloroethane and (2) reaction of the 1,1,1- trifluoro-2-chloroethane and hydrogen fluoride to produce 1,1,1,2-tetrafluoroethane wherein both reactions are carried out at superatmospheric pressure, reaction (2) is carried out at a temperature in the range of 250.degree.-450.degree. C., reaction (1) is carried out at a temperature in the range of 200.degree.-400.degree. C. but below that used in reaction (2) and unconverted 1,1,1-trifluoro-2-chloroethane is recycled for further reaction with hydrogen fluoride.
    Type: Grant
    Filed: September 15, 1994
    Date of Patent: September 24, 1996
    Assignee: Imperial Chemical Industries PLC
    Inventors: John D. Scott, Rachel A. Steven
  • Patent number: 5395996
    Abstract: 1,1,1,2-tetrafluoroethane (HFA 134a) is manufactured from trichloroethylene by a two-stage process comprising reacting trichloroethylene with hydrogen fluoride under superatmospheric pressure in a first reaction zone to form 1,1,1-trifluoro-2-chloroethane (133a) and reacting the 1,1,1-trifluoro-2-chloroethane with hydrogen fluoride in a second reaction zone to form 1,1,1,2-tetrafluoroethane; the entire product stream from the 133a reaction zone together with additional HF of required is fed through the 134a reaction zone. The two reaction zones may be provided within a single reaction vessel.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: March 7, 1995
    Assignee: Imperial Chemical Industries plc
    Inventors: John D. Scott, Rachel A. Steven
  • Patent number: 5382722
    Abstract: 1,1,1,2-tetrafluoroethane (HFA 134a) is manufactured from trichloroethylene by a two-stage process comprising reacting trichloroethylene with hydrogen fluoride in one reactor to form 1,1,1-trifluoro-2-chloroethane (133a) and reacting the 1,1,1-trifluoro-2-chloroethane with hydrogen fluoride in another reactor to form 1,1,1,2-tetrafluoroethane. The invention is characterized by reversing the reactor sequence and passing the entire product stream from the HFA 134a reactor together with trichloroethylene through the 133a reactor and separating 134a and hydrogen chloride from the recycle stream between the 133a reactor and the 134a reactor.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: January 17, 1995
    Assignee: Imperial Chemical Industries PLC
    Inventors: John D. Scott, Rachel A. Steven
  • Patent number: 5243107
    Abstract: 1,1,1,2-tetrafluoroethane (HFA 134a) is manufactured from trichloroethylene by a two-stage process comprising reacting trichloroethylene with hydrogen fluoride in one reactor to form 1,1,1-trifluoro-2-chloroethane (133a) and reacting the 1,1,1-trifluoro-2-chloroethane with hydrogen fluoride in another reactor to form 1,1,1,2-tetrafluoroethane. The invention is characterised by reversing the reactor sequence and passing the entire product stream from the HFA 134a reactor together with trichloroethylene through the 133a reactor and separating 134a and hydrogen chloride from the recycle stream between the 133a reactor and the 134a reactor.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: September 7, 1993
    Assignee: Imperial Chemical Industries PLC
    Inventors: John D. Scott, Rachel A. Steven
  • Patent number: 5243105
    Abstract: 1,1,1,2-tetrafluoroethane (HFA 134a) is manufactured from trichloroethylene by a two-stage process comprising reacting trichloroethylene with hydrogen fluoride under superatmospheric pressure in a first reaction zone to form 1,1,1-trifluoro-2-chloroethane (133a) and reacting the 1,1,1-trifluoro-2-chloroethane with hydrogen fluoride in a second reaction zone to form 1,1,1,2-tetrafluoroethane; the entire product stream from the 133a reaction zone together with additional HF of required is fed through the 134a reaction zone. The two reaction zones may be provided within a single reaction vessel.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: September 7, 1993
    Assignee: Imperial Chemical Industries PLC
    Inventors: John D. Scott, Rachel A. Steven
  • Patent number: D678132
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: March 19, 2013
    Inventors: Kendall Stevens, Rachel Stevens