Inventor
CHUM HELENA L
US17 patents
⚠️ This page may combine multiple inventors who share the name “CHUM HELENA L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MIDWEST RESEARCH INST
12 patentsUS5821553AOct 13, 1998
Pyrolysis and hydrolysis of mixed polymer waste comprising polyethyleneterephthalate and polyethylene to sequentially recover
MIDWEST RESEARCH INST31 citations96
US5504259AApr 2, 1996
Process to convert biomass and refuse derived fuel to ethers and/or alcohols
MIDWEST RESEARCH INST238 citations96
US5464602ANov 7, 1995
Sequential pyrolysis of plastic to recover polystyrene HCL and terephthalic acid
MIDWEST RESEARCH INST28 citations96
US5359061AOct 25, 1994
Controlled catalytic and thermal sequential pyrolysis and hydrolysis of polymer waste comprising nylon 6 and a polyolefin or mixtures of polyolefins to sequentially recover monomers or other high value products
MIDWEST RESEARCH INST60 citations96
US5321174AJun 14, 1994
Controlled catalystic and thermal sequential pyrolysis and hydrolysis of polycarbonate and plastic waste to recover monomers
MIDWEST RESEARCH INST44 citations96
US5300704AApr 5, 1994
Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products
MIDWEST RESEARCH INST34 citations96
US5216149AJun 1, 1993
Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products
MIDWEST RESEARCH INST69 citations96
US4964995AOct 23, 1990
Supercritical separation process for complex organic mixtures
MIDWEST RESEARCH INST56 citations94
US4942269AJul 17, 1990
Process for fractionating fast-pyrolysis oils, and products derived therefrom
MIDWEST RESEARCH INST92 citations94
US5359099AOct 25, 1994
Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products
MIDWEST RESEARCH INST25 citations92
US5386070AJan 31, 1995
Pyrolysis of polystyrene - polyphenylene oxide to recover styrene and useful products
MIDWEST RESEARCH INST18 citations82
US5091499AFeb 25, 1992
Process for preparing phenolic formaldehyde resole resin products derived from fractionated fast-pyrolysis oils
MIDWEST RESEARCH INST9 citations73