Patents by Inventor Richard Allan Kretchmer

Richard Allan Kretchmer 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).

  • Preparation of 3-carboalkoxy or 3-alkanoyl furans
    Patent number: 4025537
    Abstract: A large group of derivatives of 3-furoic acid and 3-furyl ketones can be prepared in high yield by a process which consists of reacting an .alpha.,.beta.-unsaturated ketone having either an .alpha.-carboalkoxy or .alpha.-acyl group with N-bromosuccinimide and thermally cyclizing the resulting bromine containing intermediate.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: May 24, 1977
    Inventors: Richard Allan Kretchmer, Robert Anton Laitar