Assignee
CHEM SYSTEMS
26 patents
Top patents by PatentIndex Score
US3957651AMay 18, 1976
Microporous polyester membranes and polymer assisted phase inversion process for their manufacture
CHEM SYSTEMS88 citations96
US4477594AOct 16, 1984
Process for the synthesis of aliphatic alcohol-containing mixtures
CHEM SYSTEMS31 citations92
US4035459AJul 12, 1977
Process for spinning dry-fiber cellulose acetate hollow fiber membranes
CHEM SYSTEMS35 citations92
US3945926AMar 23, 1976
Integral microporous high void volume polycarbonate membranes and a dry process for forming same
CHEM SYSTEMS46 citations92
US4311851AJan 19, 1982
Preparation of carboxylic acid esters with BF3 -alcohol complex catalyst
CHEM SYSTEMS34 citations88
US4031123AJun 21, 1977
Methanol production in a paraffinic medium
CHEM SYSTEMS38 citations86
US4048271ASep 13, 1977
Dry process for forming polycarbonate membranes
CHEM SYSTEMS25 citations82
US4422886ADec 27, 1983
Surface treatment for aluminum and aluminum alloys
CHEM SYSTEMS23 citations79
US4256913AMar 17, 1981
Preparation of carboxylic acids using a BF3 catalyst complex
CHEM SYSTEMS23 citations78
US4585899AApr 29, 1986
Hydrogenation of carboxylic acid compounds to aldehydes using MnO2 on gamma alumina as catalyst
CHEM SYSTEMS15 citations74
US4262138AApr 14, 1981
Preparation of carboxylic acid esters with BF3 complex catalyst
CHEM SYSTEMS14 citations74
US4261899AApr 14, 1981
Phthalic anhydride reaction system
CHEM SYSTEMS16 citations74
US4585900AApr 29, 1986
Hydrogenation of carboxylic acid compounds to aldehydes using Cu/YtO as catalyst
CHEM SYSTEMS7 citations73
US4045477AAug 30, 1977
Acetoxylation process
CHEM SYSTEMS6 citations73
US4035457AJul 12, 1977
Nonbiodegradable polymers
CHEM SYSTEMS8 citations73
US4391652AJul 5, 1983
Surface treatment for aluminum and aluminum alloys
CHEM SYSTEMS16 citations71
US4158100AJun 12, 1979
Process for the preparation of β-phenylethyl alcohol via homologation
CHEM SYSTEMS7 citations71
US4012424AMar 15, 1977
Cracking of mixtures containing hydroxyesters
CHEM SYSTEMS8 citations71
US4087623AMay 2, 1978
Catalyst recovery process
CHEM SYSTEMS8 citations69
US4567204AJan 28, 1986
Method for making methanol
CHEM SYSTEMS15 citations68
US4325803AApr 20, 1982
Process for hydrogenation/extraction of organics contained in rock
CHEM SYSTEMS8 citations66
US4439309AMar 27, 1984
Two-stage hydrogen donor solvent cracking process
CHEM SYSTEMS6 citations63
US4012423AMar 15, 1977
Process for the production of epoxides
CHEM SYSTEMS3 citations59
US4639470AJan 27, 1987
Method for making methanol
CHEM SYSTEMS3 citations57
US4250344AFeb 10, 1981
Cracking process for styrene
CHEM SYSTEMS3 citations57
US4399295AAug 16, 1983
Process for preparing oxirane compounds
CHEM SYSTEMS0 citations42