Inventor
SCHMIDT PAUL J
US63 patents
⚠️ This page may combine multiple inventors who share the name “SCHMIDT PAUL J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
STERLING DRUG INC
29 patentsUS4257954AMar 24, 1981
Novel compounds, processes and marking systems
STERLING DRUG INC45 citations93
US4307898ADec 29, 1981
Carbonless duplicating and marking systems
STERLING DRUG INC8 citations74
US4275121AJun 23, 1981
Carbonless duplicating and marking systems utilizing indolyl-substituted furanone color formers
STERLING DRUG INC5 citations74
US4251446AFeb 17, 1981
Phthalide compounds, processes and marking systems
STERLING DRUG INC7 citations74
US4189171AFeb 19, 1980
Marking systems containing 3-aryl-3-heterylphthalides and 3,3-bis(heteryl)phthalides
STERLING DRUG INC7 citations74
US4168378ASep 18, 1979
3-(9-Julolidinyl)-3-(diphenylamino)phthalides
STERLING DRUG INC8 citations74
US4094877AJun 13, 1978
Tri- or tetrasubstituted diphenylphthalides
STERLING DRUG INC7 citations74
US4446321AMay 1, 1984
4-Aryl-bis 2,6-(aminophenyl)pyridines
STERLING DRUG INC4 citations63
US4431819AFeb 14, 1984
3-(Pyrrolo and 3-indolyl)-3-diphenylamino substituted phthalides
STERLING DRUG INC4 citations63
US4403791ASep 13, 1983
Carbonless duplicating and marking systems
STERLING DRUG INC6 citations63
US4398030AAug 9, 1983
3-[(Substituted-amino)(aryl)methyl]-1H-indoles
STERLING DRUG INC2 citations63
US4377698AMar 22, 1983
2,4 Bis(2-indolyl-3)-4-oxobutanoic acids
STERLING DRUG INC2 citations63
US4363503ADec 14, 1982
Pyridine color formers
STERLING DRUG INC6 citations63
US4351768ASep 28, 1982
2-[(3-Indolyl)carbonyl]-4/5-carboxybenzoic acids
STERLING DRUG INC4 citations63
US4343493AAug 10, 1982
Duplicating and marking systems
STERLING DRUG INC2 citations63
US4337340AJun 29, 1982
Processes for preparing substituted furopyridinones and furopyrazinones
STERLING DRUG INC2 citations63
US4322352AMar 30, 1982
Indolyl phthalide compounds
STERLING DRUG INC4 citations63
US4298215ANov 3, 1981
Carbonless duplicating and marking systems
STERLING DRUG INC2 citations63
US4200313AApr 29, 1980
Carbonless duplicating systems
STERLING DRUG INC6 citations63
US4187223AFeb 5, 1980
3-[4-(Disubstituted-amino)phenyl]-3-(diphenylamino)phthalides
STERLING DRUG INC4 citations63
US4182714AJan 8, 1980
Carbazole containing phthalides
STERLING DRUG INC2 citations63
US4096176AJun 20, 1978
Benzoylbenzoic acids
STERLING DRUG INC4 citations63
US4032527AJun 28, 1977
Phenyljulolidinylphthalides
STERLING DRUG INC4 citations63
US4341402AJul 27, 1982
Systems employing indole color formers
STERLING DRUG INC5 citations54
US4485242ANov 27, 1984
3[(Alkoxy)(4-aminophenyl, 1-naphthyl or 1-biphenylyl)methyl]1H-indoles
STERLING DRUG INC0 citations52
US4414399ANov 8, 1983
5/6 Carboxyphthalides
STERLING DRUG INC1 citations52
US4396767AAug 2, 1983
2,6-Bis(heteroaryl)pyridines
STERLING DRUG INC0 citations52
US4321369AMar 23, 1982
Compositions, process and systems
STERLING DRUG INC0 citations52
US4251092AFeb 17, 1981
Pressure sensitive carbonless duplicating systems and thermal marking systems
STERLING DRUG INC1 citations52
HILTON DAVIS CHEMICAL CO
13 patentsUS4688059AAug 18, 1987
Marking systems
HILTON DAVIS CHEMICAL CO7 citations74
US4535172AAug 13, 1985
3(Ether and thioether) 3-(4-dialkylaminophenyl) phthalides
HILTON DAVIS CHEMICAL CO7 citations74
US4732991AMar 22, 1988
Substituted phthalides
HILTON DAVIS CHEMICAL CO2 citations63
US4595768AJun 17, 1986
3-(substituted phenyl)phthalides
HILTON DAVIS CHEMICAL CO5 citations63
US4477676AOct 16, 1984
4-(3-Indolyl)-2,3-dichloro-4-oxo-2-butenoic acids
HILTON DAVIS CHEMICAL CO3 citations63
US4451657AMay 29, 1984
3,5- And 5,5-bis(3-indolyl)-2-(5H)furanones
HILTON DAVIS CHEMICAL CO5 citations63
US4697018ASep 29, 1987
9-julolidinyl derivatives and process of preparing them
HILTON DAVIS CHEMICAL CO1 citations52
US4661605AApr 28, 1987
3-(ether and thioether)-3-(indolyl)-phthalides
HILTON DAVIS CHEMICAL CO1 citations52
US4618684AOct 21, 1986
Substituted indoles
HILTON DAVIS CHEMICAL CO0 citations52
US4540790ASep 10, 1985
Certain 4-substituted-2,6-bis(heteroaryl)pyridines
HILTON DAVIS CHEMICAL CO0 citations52
US4539579ASep 3, 1985
Compounds, processes and marking systems
HILTON DAVIS CHEMICAL CO1 citations52
US4515971AMay 7, 1985
5'/6'-Carboxyfluorans and derivatives thereof
HILTON DAVIS CHEMICAL CO1 citations52
US4507483AMar 26, 1985
3-[(Substituted-amino)(thienyl)methyl]-1H-indoles
HILTON DAVIS CHEMICAL CO0 citations52
REA MAGNET WIRE CO INC
1 patentWALKER KURT
1 patentHILTON DAVIS CHEMICAL
1 patentOUTBOARD MARINE CORP
1 patentVIASAT INC
1 patentHUNG WILLIAM M
1 patentSCHMIDT PAUL J
1 patentACCENTURE GLOBAL SERVICES LTD
1 patentShowing the top 50 of 63 patents by PatentIndex Score.