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STEPAN CHEMICAL CO

Overview
  • Total Patents
    88
About

STEPAN CHEMICAL CO has a total of 88 patent applications. Its first patent ever was published in 1953. It filed its patents most often in United States, Canada and France. Its main competitors in its focus markets organic fine chemistry, basic materials chemistry and machines are CONDEA AUGUSTA SPA, UNICHEM CHEMIKALIEN HANDELS A and SINNOVA OU SADIC.

Patent filings per year

Chart showing STEPAN CHEMICAL COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Knaggs Edward A 19
#2 Nussbaum Marvin L 10
#3 Fischer Elias 8
#4 Beck Walter 7
#5 Lomax Archie L 4
#6 Lemberg Seymour 4
#7 Blackwood John C 4
#8 Jacobs Richard L 3
#9 Sullivan Jr Vincent A 3
#10 Backley Donald A 3

Latest patents

Publication Filing date Title
US4521611A Polyester polyol blend from phthalic anhydride bottoms
US4452731A Cleaner for ovens and the like using sodium alpha olefin sulfonate and sodium silicate
US4451393A Cleaner for ovens and the like using sodium alpha olefin sulfonate, sodium hydroxide, and sodium silicate
US4370272A Alkoxylated quaternary ammonium surfactants
US4347742A Evaluating sprayability
US4390474A Sulfonation petroleum composition
US4269730A Substituted imidazoline reactions with chloroacetate salts
US4252192A Process for enhanced oil recovery employing petroleum sulfonates
WO7900701A1 Improved petroleum sulfonates
US4224455A Sulfonated alkoxylated alkyl arylol maleate reactive surfactants
US4246387A Emulsion polymerization with sulfonated alkoxylated alkyl arylol maleates
US4111853A Particulate composition of sodium alpha olefin sulfonate and sodium silicate
US4018333A Metal fastener sticks and process of preparing same by curing polymeric binder for said under conditions of U.V. irradiation
GB1515774A Metal fastener sticks and process of preparing same
US4148821A Process for sulfonation
US4052431A Process for the production of commercial alpha olefin sulfonates
US3920590A Low-density polyester resin foams and method of preparation
US3920591A Low-density polyester resin foams and method of preparation
US3920589A Low-density polyester resin foams and method of preparation
CH609316A5 Process for the preparation of a mixture of 14-oxobicyclo-(10,4,0)-hexadex-1(12)-ene (I) and 14-oxobicyclo-(10,4,0)-hexadec-12-ene (II)