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COAL TAR RES ASS

Overview
  • Total Patents
    49
About

COAL TAR RES ASS has a total of 49 patent applications. Its first patent ever was published in 1951. It filed its patents most often in United Kingdom, Canada and United States. Its main competitors in its focus markets organic fine chemistry, basic materials chemistry and chemical engineering are YORKSHIRE TAR DISTILLERS LTD, BEIJING RISUN TECH CO LTD and BEIJING RISUNTECHNOLOGY CO LTD.

Patent filings in countries

World map showing COAL TAR RES ASSs patent filings in countries
# Country Total Patents
#1 United Kingdom 36
#2 Canada 6
#3 United States 3
#4 Germany 2
#5 France 2

Patent filings per year

Chart showing COAL TAR RES ASSs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Waddington Wright 12
#2 Betts Welsley Donald 6
#3 Thompson Geoffrey Hoyle 4
#4 Dean Raymond E 4
#5 Sharp John A 4
#6 Popper Felix Berthold 4
#7 Sharp John Alan 3
#8 Betts Wesley Donald 3
#9 Kuhnel Mervyn Redfern 3
#10 Dean Raymond Ernest 3

Latest patents

Publication Filing date Title
GB1259956A Reflux crystallisation
DE1596773A1 Method of manufacturing a glass tube
GB1124839A Improvements in or relating to the alkylation of phenols
GB1125087A Improvements in or relating to the alkylation of phenols
GB1132650A Improvements in and relating to tubular structures
GB1060036A Improvements in or relating to the alkylation of phenols
GB1116834A Improvements in and relating to the production of plastic materials
GB1077995A Improvements relating to paste for the production of carbon bodies
US3289482A Sampling device
GB997743A Improvements relating to the production of plastic materials
GB992325A Improvements in and relating to pitch rubber compositions
GB1008756A Improvements in and relating to the treatment of coal tar products
US3135757A Process for the separation of pyridine homologues
GB986763A Fluid sampling device
GB951421A Improvements in and relating to the distillation of tar
GB949999A Improvements relating to the production of naphthalene
GB966390A Thermal treatment of pitch
GB991547A Coking pitch
GB960891A Improvements in and relating to coal tar products
GB1007012A Oxidation of polycyclic hydrocarbons