Inventor

CROUNSE NATHAN N

US45 patents

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

CROUNSE NATHAN N

STERLING DRUG INC

Phototoxic insecticidal compositions and method of use thereof

Synergistic insecticidal compositions

Novel compositions and processes

Water-soluble quaternary ammonium non-heterocyclic azo dyestuffs

Carbonless duplicating and marking systems utilizing indolyl-substituted furanone color formers

Phthalide compounds, processes and marking systems

Marking systems containing 3-aryl-3-heterylphthalides and 3,3-bis(heteryl)phthalides

Tri- or tetrasubstituted diphenylphthalides

N,N-Dialkyl-N-aminoalkyl-N-(amino or nitro)phenylalkyl- and N-methyl-N-[3-(amino or nitro)phenoxy-2-hydroxy-1-propyl]-N,N-bis(3-aminopropyl)quaternary ammonium salts

Water-soluble quaternary ammonium azo dyestuffs

Water-soluble quaternary ammonium dyestuffs

Water-soluble quaternary ammonium heterocyclic azo dyestuffs

Stilbene optical brighteners and compositions brightened therewith

Detergent compositions containing novel crystalline forms of optical brighteners

Novel crystalline forms of optical brighteners

Monoazo and disazo colorants

N-Aminoalkylenesulfonamido substituted monoazo colorants

2,4 Bis(2-indolyl-3)-4-oxobutanoic acids

Novel monoazo and disazo colorants

2-[(3-Indolyl)carbonyl]-4/5-carboxybenzoic acids

Indolyl phthalide compounds

Novel monoazo and disazo colorants from aminoalkylanilines and bis(aminoalkyl)anilines

Monoazo and diazo colorants from aminoalkylanilines and bis(aminoalkyl)anilines

Benzoylbenzoic acids

Phenyljulolidinylphthalides

4,4&#39;-Stilbenebis-pyridooxazoles and related optical brighteners and polymeric compositions brightened thereby

Azo dyestuff intermediate nitro- or aminobenzenes ring-substituted by a quaternized amine alkyl or amino-alkoxy group

Polycyclic iminoisoindoline chelates

1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines

Metal chelates of 1-imino-3-(4-thioxo-5-thiazolidinylidene)isoindolines

Thiazolidinylidene-isoindolines

Certain substituted 2-phenylnaphtho[1,2-b]furane and -[2,1-b]furane

Stilbene optical brighteners and compositions brightened therewith

Polyaminoalkylenesulfonamidated disazo colorants

Morpholinodiphenylphthalides

Thiazolidinylidene isoindoline pigments

Heteroarylphthalides

Diphenylphthalide duplicating and marking systems

Compounds including carboxystyrylphenyl group

HILTON DAVIS CHEMICAL CO

Phthalocyanines

Substituted phthalides

3-(substituted phenyl)phthalides

4-(3-Indolyl)-2,3-dichloro-4-oxo-2-butenoic acids

3,5- And 5,5-bis(3-indolyl)-2-(5H)furanones

N-Aminoalkylenesulfonamido substituted disazo colorants

4,4'-Stilbenebis-pyridooxazoles and related optical brighteners and polymeric compositions brightened thereby