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WOODALL DUCKHAM LTD

Overview
  • Total Patents
    45
About

WOODALL DUCKHAM LTD has a total of 45 patent applications. Its first patent ever was published in 1924. It filed its patents most often in United Kingdom, Germany and United States. Its main competitors in its focus markets basic materials chemistry, materials and metallurgy and environmental technology are STILL C, ROBERT DEMPSTER AND SONS LTD and KOPPERS CO DELAWARE.

Patent filings in countries

World map showing WOODALL DUCKHAM LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 21
#2 Germany 9
#3 United States 6
#4 France 3
#5 South Africa 3
#6 Australia 2
#7 Spain 1

Patent filings per year

Chart showing WOODALL DUCKHAM LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Singleton Frank Henry 8
#2 Gosden Derek Vernon 5
#3 Austin James 4
#4 Randell Geoffrey Edward Charle 3
#5 Marshall Anthony Roland 3
#6 Atkinson Derek Robert 2
#7 Robson David George 2
#8 Jackson Frank 2
#9 Bruce Jack William 2
#10 King L 2

Latest patents

Publication Filing date Title
GB1534925A Coke oven battery installations
US3966876A Gas purification
GB1488250A Performing chemical reactions
GB1434029A Gas purification
GB1405309A Gas purification
GB1434030A Gas p'rification
GB1426335A Treatment of inorganic dust
GB1367365A Charging of horizontal coke ovens
US3800867A Through flow fluid treatment apparatus
ZA7004279B Improvements relating to horizontal coke oven batteries
GB1278207A Improvements trlating to the extracton of tin from its ores
AU1005370A Improvements relating tothe purification of chlorine
GB1309744A Decomposition of metal chlorides
GB1145389A Process for manufacture of hydrochloric acid
GB1145390A Process for manufacture of hydrochloric acid
GB1137930A Improvements in or relating to the production of combustible gas
GB1162375A Improvements relating to the reaction of solids with mineral acids
GB1128686A Improvements relating to mineral processing
GB1131354A Improvements relating to the treatment of inorganic dust
GB1126464A Feeding material into containers