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DREW CHEM CORP

Overview
  • Total Patents
    252
About

DREW CHEM CORP has a total of 252 patent applications. Its first patent ever was published in 1958. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets surface technology and coating, environmental technology and basic materials chemistry are HOUSEMAN & THOMPSON LTD, BETZ INT and NINGXIA PAGODA CHEMICAL CENTER LABORATORY CO LTD.

Patent filings per year

Chart showing DREW CHEM CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Mahn Frederick R 14
#2 Babayan Vigen K 13
#3 Thomas Peter A 12
#4 Mullins Michael A 10
#5 Luttinger Lionel B 9
#6 Boylan Francis J 9
#7 Weiss Charles O 8
#8 Emerich Dwight E 7
#9 Libutti Bruce L 7
#10 Herman Karl William 6

Latest patents

Publication Filing date Title
WO9532801A1 A process for improving the effectiveness of a process catalyst
US5590716A Method of inhibiting downhole corrosion of metal surfaces
CA2177593A1 Reducing bacteria population in contaminated aqueous systems
US5403496A Process for stabilizing metals in ash
US5401326A Microemulsion cleansers and their uses
US5401325A Process for removing carbon deposits using microemulsion cleaners
US5382520A Automated method for controlling the rate of chlorine dioxide generation
US5073354A Process of stripping gold and silver from carbon
US5068059A Corrosion inhibitor
US4929274A Recovery of metal values from ores
US4915872A Cast solid block corrosion inhibitor composition
US4961878A Corrosion inhibitor for a closed aqueous cooling system
US4970026A Corrosion inhibitor
US4724142A Synergistic microbiocidal compositions containing a mixture of a N-alkyl dimethylbenzylammonium halide and an acrolein/formaldehyde polycondensation product
US4725612A Synergistic microbiocidal compositions containing a mixture of a bicyclic polyoxymethylene oxazolidine and a 1,2-benzisothiazolin-3-one
US4725611A Synergistic microbiocidal compositions containing a mixture of a bicyclicpolyoxymethyleneoxazolidine and a 4-isothiazolin-3-one
US4724143A Synergistic microbiocidal composition containing a mixture of a bicyclic polyoxymethyleneoxazolidine and an acroloin/formaldehyde polycondensation product
EP0257743A1 Process and apparatus for forming polymeric solutions
US4725613A Synergistic microbiocidal composition containing a mixture of a N-alkyldimethylbenzyl ammonium halide and a bicyclicpolyoxymethylene oxazolidine
US4806310A Corrosion inhibitor