Patents by Inventor Gordon E. Langford

Gordon E. Langford 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).

  • Scale-up and synthesis of 1-methoxycyglohepta-1,3,5-triene
    Patent number: 4978806
    Abstract: A method for preparation of 1-methoxycyclohepta-1,3,5-triene in commercial quantities, which comprises the steps of heating 7,7-dichloro-1-methoxybicyclo[4.1.0]heptane in a refluxing reaction solvent comprising a lower boiling aromatic amine, at reflux, until suitable amounts of 1-methoxycyclohepta-1,3,5-triene have been produced, and recovering the 1-methoxycyclohepta-1,3,5-triene. Suitable reaction solvents include 2-picoline, pyridine and 2,6-lutidine. The method according to the present invention results in safer temperature control in the production of 1-methoxycyclohepta-1,3,5-triene, and increased yields.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: December 18, 1990
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence of Her Majesty's Canadian Government
    Inventor: Gordon E. Langford