Patents by Inventor Jane L. Butcher

Jane L. Butcher 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).

  • Production of hydrofluorocarbons
    Patent number: 5637776
    Abstract: A process for the production of a hydro(halo)fluorocarbon which comprises heating an .alpha.-fluoroether in the vapour phase at elevated temperature. .alpha.-fluoroethers are obtained by reacting a non-enolisable aldehyde with hydrogen fluoride to form an intermediate and reacting the intermediate with an alcohol or a halogenating agent. Novel .alpha.-fluoroethers are also provided.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: June 10, 1997
    Assignee: Imperial Chemical Industries PLC
    Inventors: Leslie Burgess, Jane L. Butcher, Thomas A. Ryan, Peter P. Clayton
  • Process for the production of bis(fluoromethyl)ether
    Patent number: 5623091
    Abstract: A composition comprising bis(fluoromethyl)ether and less than an equimolar amount of water, a process for the production of the composition comprising contacting formaldehyde with hydrogen fluoride and separating at least some of the by-product water from bis(fluoromethyl)ether, and use of the composition for the production of difluoromethane.
    Type: Grant
    Filed: September 5, 1995
    Date of Patent: April 22, 1997
    Assignee: Imperial Chemical Industries PLC
    Inventors: Jane L. Butcher, Thomas A. Ryan, Leslie Burgess
  • Production of hydrofluorocarbons
    Patent number: 5504263
    Abstract: A process for the production of a hydro(halo)fluorocarbon which comprises heating an .alpha.-fluoroether in the vapor phase at elevated temperature. .alpha.-fluoroethers are obtained by reacting a non-enolizable aldehyde with hydrogen fluoride to form an intermediate and reacting the intermediate with an alcohol or a halogenating agent. Novel .alpha.-fluoroethers are also provided.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: April 2, 1996
    Assignee: Imperial Chemical Industries PLC
    Inventors: Leslie Burgess, Jane L. Butcher, Thomas A. Ryan, Peter P. Clayton
  • Production of difluoromethane
    Patent number: 5463139
    Abstract: A composition comprising bis(fluoromethyl)ether and less than an equimolar amount of water, a process for the production of the composition comprising contacting formaldehyde with hydrogen fluoride and separating at least some of the by-product water from bis(fluoromethyl)ether, and use of the composition for the production of difluoromethane.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: October 31, 1995
    Assignee: Imperial Chemical Industries PLC
    Inventors: Jane L. Butcher, Thomas A. Ryan, Leslie Burgess