Inventor · Ruhland, DE

Renate Hempel

15Patents

6h-index

39Co-inventors

66Inventor score

Filing activity: Jul 10, 1996 → Oct 10, 2017

Most-cited inventions

Patent	Title	Area	Cited by	Status
US6284812A	Thermally stable rigid foams based on isocyanate and having low brittleness and low thermal conductivity	Chemistry; Metallurgy	19	Expired
US6495652B1	Prepolymers containing isocyanate groups and a method for the production thereof	Chemistry; Metallurgy	16	Expired
US5624969A	Production of rigid foams based on isocyanate	Chemistry; Metallurgy	13	Expired
US5684092A	Production of rigid foams based on isocyanate	Chemistry; Metallurgy	10	Expired
US5895792A	Production of rigid polyurethane foams	Chemistry; Metallurgy	9	Expired
US6037383A	Microcellular polyurethane elastomer containing urea groups	Chemistry; Metallurgy	7	Expired
US6063824A	Microcellular urea-containing polyurethane elastomer	Chemistry; Metallurgy	6	Expired
US9630866B2	Process for workup of NOx-containing offgases from wastewater streams of nitration plants	Chemistry; Metallurgy	4	Active
US6274642A	Storage-stable, blowing agent-containing emulsions for producing rigid foams based on isocyanate	Chemistry; Metallurgy	4	Expired
US5916480A	Storage-stable emulsions for producing fine-celled rigid foams based on isocyanate	Chemistry; Metallurgy	3	Expired
US10538478B2	Catalyst modification with alkali metal, alkaline earth metal or rare earth metal ions in the continuous liquid-phase hydrogenation of nitro compounds	Chemistry; Metallurgy	1	Active
US9249083B2	Process for scrubbing dinitrotoluene	Chemistry; Metallurgy	0	Active
US9688606B2	Process for acidic scrubbing of dinitrotoluene in the presence of hydrocyanic acid	Chemistry; Metallurgy	0	Active
US9428441B2	Method for removing HCN from crude dinitro toluene	Chemistry; Metallurgy	0	Active
US8529771B2	Acidic sludge adsorption of DNT wastewaters	Chemistry; Metallurgy	0	Active

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