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YORKSHIRE TAR DISTILLERS LTD

Overview
  • Total Patents
    47
About

YORKSHIRE TAR DISTILLERS LTD has a total of 47 patent applications. Its first patent ever was published in 1933. It filed its patents most often in United Kingdom, France and United States. Its main competitors in its focus markets organic fine chemistry, basic materials chemistry and chemical engineering are DANCIGER OIL & REFINERIES INC, ZECHE MATHIAS STINNES and BADGER LICENSING LLC.

Patent filings in countries

World map showing YORKSHIRE TAR DISTILLERS LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 44
#2 France 2
#3 United States 1

Patent filings per year

Chart showing YORKSHIRE TAR DISTILLERS LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Holdsworth Ernest Clifford 13
#2 Milner David William 12
#3 Everest-Todd Selwyn 2
#4 Worth Ernest Clifford Holds 2
#5 Lucas Owen David 2
#6 Lush Ernest Joseph 2
#7 Stocks John Arthur 1
#8 Jowett Donald 1
#9 William Milner David 1
#10 Clapham Peter 1

Latest patents

Publication Filing date Title
GB1101542A Treatment of coal tar
GB1094373A Purification of coal tar phenols
GB990783A Improvements in and relating to the production of coal tar bases
GB1093944A Improvements in and relating to surface condensers
GB1070891A Improvements in and relating to the continuous production of hexachlorocyclopentadien
GB992319A Process for recovering tar phenols and bases from coal tar distillates containing the same
GB959228A Substituted thioureas and their use as pesticidal agents
GB992801A Herbicidal compositions
GB855489A Isolation of dimethyl phenol
GB839797A Substituted thioureas and their use as pesticidal agents
GB858758A The production of new herbicidal and fungicidal compositions
GB835569A Manufacture of phenol
GB797238A Sight glass, for observing liquid in a pipe
GB782088A Purification of naphthalene
GB777382A Treatment of tar works effluent
GB815223A The recovery of tar acids from tar oils
GB760054A Purification of naphthalene
GB729872A Prevention of corrosion during the distillation of hydrocarbons
GB757700A Recovery of pyridine bases in the distillation of crude tars and oils
GB757790A Improvements in or relating to the interaction of carbon disulphide and primary aromatic amines