Patents by Inventor Joan Christine Potenza

Joan Christine Potenza 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).

  • Intermediates for the preparation of pyrazoloazole photographic couplers, processes of making and adjusting them
    Patent number: 5981760
    Abstract: There are described intermediates for the preparation of known pyrazoloazole photographic magenta dye forming couplers and processes for making and using these intermediates. The intermediates are low molecular weight compounds represented by the structure: ##STR1## wherein: R, X, R.sup.1 and Y are defined herein. The process for making these intermediates involves diazotizing a 5-amino-1H-pyrazole to produce a 5-diazo-1H-pyrazole, then condensing the diazotized product with an active methine or methylene compound having a pKa of 14 or less to produce a substituted hydrazone and then subjecting the hydrazone to cyclization and reduction, in either order.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: November 9, 1999
    Assignee: Eastman Kodak Company
    Inventors: Chang Kyu Kim, Joan Christine Potenza, Francesco DeBellis, David Hoke, Robert Fogg Romanet