Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Production of ethylenediamine and N-aminoethylpiperazine from piperazine

Production of ethylenediamine and N-aminoethylpiperazine from piperazine

US Patent 4602091 · Granted Jul 22, 1986

Estimated economic value: $10,543,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Alkoxylated ethylene glycol diamine bottoms products for rigid urethane foams1989
Urea catalyst for preparation of sucrose polyols useful for rigid polyurethane f1989
Phosphorus containing aromatic amino polyols1987
Polyurethane foams based on amino polyols1987
Catalytic process for the production of hydroxyamine derivatives of alpha methyl1986
Preparation of linear polyethylenepolyamines with silica-alumina catalysts1985
Manufacture of polyols and rigid polyurethane foam using thiodialkylene glycols1985
Aromatic polyols made from polyethylene terephthalate scrap, glycols and aromati1985
Alkoxylated modified Mannich condensates and manufacture of rigid polyurethane f1985
Mannich condensates having fire retardancy properties and manufacture of rigid p1984
Modified Mannich condensates and manufacture of rigid polyurethane foam with alk1984
Alkoxylated Mannich condensates having fire retardancy properties and manufactur1984