Inventor

PROTA GUISEPPE

IT5 patents

⚠️ This page may combine multiple inventors who share the name “PROTA GUISEPPE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CLAIROL INC

4 patents

US5603734AFeb 18, 1997

Hair dyeing with persulfate oxidants and catechols

CLAIROL INC14 citations71

US5374288ADec 20, 1994

Oxidative hair dyeing method, composition, and kit utilizing hydroxyl substituted benzothiazines

CLAIROL INC9 citations71

US5584889ADec 17, 1996

Oxidative hair dyeing process with dihydroxybenzenes and aminoethanethiols

CLAIROL INC5 citations60

US5435810AJul 25, 1995

Hair dyeing process with aminoalkylthio substituted dihydroxybenzene and oxidative agents

CLAIROL INC2 citations60

BRISTOL MYERS SQUIBB CO

1 patent

US5980586ANov 9, 1999

Oxidative hair dyeing process with dihydroxybenzenes and aminoethanethiols

BRISTOL MYERS SQUIBB CO8 citations71