Patents by Inventor Roger Edwin Preston

Roger Edwin Preston 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).

  • Hydrazine derivatives of pyridyl-ketones
    Patent number: 4092323
    Abstract: The disclosure relates to novel protected ketone derivatives, for example dimethyl 3-(3-chlorophenoxy)-2-semicarbazonopropylphosphonate, for use as intermediates in the synthesis of known prostaglandin analogues, and to a process for their manufacture.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: May 30, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: Robert Foster, Roger Edwin Preston, Graham Ernest Robinson
  • Phosphonates containing protected ketone group
    Patent number: 4046841
    Abstract: The disclosure relates to novel protected ketone derivatives, for example dimethyl 3-(3-chlorophenoxy)-2-semicarbazonopropylphosphonate, for use as intermediates in the synthesis of known prostaglandin analogues, and to a process for their manufacture.
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: September 6, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventors: Robert Foster, Roger Edwin Preston, Graham Ernest Robinson