Inventor · Wilmington, DE, US

John J. Ostermaier

28Patents
7h-index
18Co-inventors
66Inventor score

Filing activity: Aug 2, 1974 → Jun 6, 2012

Most-cited inventions

PatentTitleAreaCited byStatus
US4416825A Preparation of zerovalent nickel complexes Chemistry; Metallurgy 43 Expired
US3957689A Process for preparing an attrition resistant zeolite hydrocarbon conversion catalyst Performing Operations; Transporting 34 Expired
US4749801A [Hexakis(pentenenitrilo)nickel II]bis-[.mu.-(cyano) bis(triphenylborane) (I)], its method of preparation and its use Chemistry; Metallurgy 25 Expired
US5312959A Purification of 2-methylglutaronitrile or adiponitrile Chemistry; Metallurgy 18 Expired
US6461481B1 Process for removing water from organoborane compounds Chemistry; Metallurgy 16 Expired
US6331651A Process for making hexamethylene diamine using ozone-treated adiponitrile that contains phosphorous compounds Chemistry; Metallurgy 8 Expired
US5961788A Sequential distillation process for removing tetrahydroazepine from aminocapronitrile and/or hexamethylenediamine Chemistry; Metallurgy 8 Expired
US4521628A Recovery of arylboranes Chemistry; Metallurgy 6 Expired
US5892122A Method for making cyclohexanol and cyclohexanone Chemistry; Metallurgy 5 Expired
US6599398B1 Recovery of adiponitrile from a mixture of adiponitrile, aminocapronitrile and hexamethylenediamine Emerging Cross-Sectional Technologies 5 Expired
US6248926A Recovery of hexamethylenediamine (HMD) with low polarographically reducible impurities (PRI) from mixtures of HMD, aminocapronitirle and PRI Chemistry; Metallurgy 4 Expired
US6887352B2 Distillative method for separating hexamethylenediamine from a mixture comprising hexamethylenediamine, 6-aminocapronitrile and tetrahydroazepine Chemistry; Metallurgy 4 Expired
US8815186B2 Nickel compositions for preparing nickel metal and nickel complexes Performing Operations; Transporting 4 Active
US8969606B2 Calcination and reduction process including a fluidizing bed reactor Performing Operations; Transporting 3 Active
US7060819B2 Process for producing hexamethylenediamine and aminocapronitrile from adiponitrile, wherein the hexamethylenediamine contains less than 100 ppm tetrahydroazepine Chemistry; Metallurgy 2 Expired
US7517985B2 Process for making solid triphenylboron-pyridine or its adduct Chemistry; Metallurgy 2 Active
US7060820B1 Process for making caprolactam Chemistry; Metallurgy 2 Expired
US9024049B2 Nickel compositions for preparing nickel metal and nickel complexes Chemistry; Metallurgy 2 Active
US6716977B1 Method for making caprolactam from impure ACN wherein ammonia and water are removed from crude caprolactam in a simple separation step and then THA is removed from the resulting caprolactam melt Chemistry; Metallurgy 2 Expired
US7208632B2 Separation of 6-aminocapronitrile and hexamethylenediamine from a mixture comprising hexamethylenediamine, 6-aminocapronitrile and tetrahydroazepine Chemistry; Metallurgy 2 Expired
US9371346B2 Preparing a nickel phosphorus ligand complex Chemistry; Metallurgy 2 Active
US9371343B2 Nickel metal compositions and nickel complexes derived from basic nickel carbonates Performing Operations; Transporting 1 Active
US7468119B2 Separation of 6-aminocapronitrile and hexamethylenediamine from a mixture comprising hexamethylenediamine, 6-aminocapronitrile and tetrahydroazepine Chemistry; Metallurgy 1 Active
US6858728B2 Method for making caprolactam from impure ACN in which THA is not removed until after caprolactam is produced Chemistry; Metallurgy 0 Expired
US8101790B2 Process for improving adiponitrile quality Chemistry; Metallurgy 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.