Inventor
BOLDEA LUCIAN
US4 patents
Patents
4 patentsUS6623914B2Sep 23, 2003
Method for preparing an acid salt of p-phenylenediamine-type photographic color developers
EASTMAN CHEM CO1 citations46
US6492099B1Dec 10, 2002
Method for purifying free-base p-phenylenediamine-type photographic color developers
EASTMAN CHEM CO0 citations46
US6551767B1Apr 22, 2003
Process for preparing p-phenylenediamine color developers in a concentrated free-base form
EASTMAN CHEM CO0 citations42
US6271424B1Aug 7, 2001
Process for the purification of monotertiarybutyl hydroquinone
EASTMAN CHEM CO0 citations35