Patents by Inventor Charles E. Jandrue

Charles E. Jandrue 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).

  • Synthesis of benzaldehydes
    Patent number: 4206139
    Abstract: Novel benzaldehydes of the formula: ##STR1## Where n.sup.1 is the integer 1-8 and each OR.sup.1 group is hydroxy or a protective group which can be converted or removed to provide the dihydroxyphenyl moiety.The benzaldehydes are particularly useful as intermediates in the preparation of yellow azomethine dye developers.
    Type: Grant
    Filed: September 27, 1978
    Date of Patent: June 3, 1980
    Assignee: Polaroid Corporation
    Inventors: Elbert M. Idelson, Charles E. Jandrue