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DUYVESTEYN WILLEM P C

Overview
  • Total Patents
    22
About

DUYVESTEYN WILLEM P C has a total of 22 patent applications. Its first patent ever was published in 1991. It filed its patents most often in United States and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets basic materials chemistry, chemical engineering and environmental technology are MARATHON OIL CANADA CORP, MAGEMA TECH LLC and DINDI HASAN.

Patent filings in countries

World map showing DUYVESTEYN WILLEM P Cs patent filings in countries

Patent filings per year

Chart showing DUYVESTEYN WILLEM P Cs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Duyvesteyn Willem P C 22
#2 Kift Julian 7
#3 Morley Raymond L 3
#4 Hoffman Cherish M 2
#5 Thompson Whip C 2
#6 Hickman Robert N 1
#7 Hanson James S 1
#8 Wicker Gordon R 1
#9 Joshi Mahendra 1
#10 Zelnik Dominic J 1

Latest patents

Publication Filing date Title
US2012151834A1 Methods of Upgrading Asphaltene Compositions
US2012204680A1 System and Method for Recovery of Nickel Values From Nickel-Containing Ores
US2012263637A1 System and Method For Recovering Boron Values From Plant Tailings
US2012207656A1 System and Method for Recovery of Scandium Values From Scandium-Containing Ores
US2011180459A1 Methods for extracting bitumen from bituminous material
US2012055850A1 Low carbon dioxide footprint process for coal liquefaction
US2011298270A1 In situ ore leaching using freeze barriers
US2010264062A1 Nozzle reactor and method of use
US2011233114A1 Nozzle reactor and method of use
US2011155648A1 Methods for obtaining bitumen from bituminous materials
US2010032348A1 Methods for obtaining bitumen from bituminous materials
US2011062057A1 Methods for obtaining bitumen from bituminous materials
US2009301937A1 Dry, stackable tailings and methods for producing the same
US2011017642A1 System and method for converting material comprising bitumen into light hydrocarbon liquid product
WO2006044485A2 Method for obtaining bitumen from tar sands
US5176802A Treatment of copper sulfide concentrates