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D & C LTD

Overview
  • Total Patents
    59
About

D & C LTD has a total of 59 patent applications. Its first patent ever was published in 1986. It filed its patents most often in United Kingdom, Japan and United States. Its main competitors in its focus markets chemical engineering, environmental technology and packaging and shipping are SIMATEK AS, ULTRAFILTER GMBH and TIG AUTOMATION GMBH.

Patent filings in countries

World map showing D & C LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 22
#2 Japan 12
#3 United States 12
#4 Germany 10
#5 EPO (European Patent Office) 2
#6 Spain 1

Patent filings per year

Chart showing D & C LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Pierson Henri Gerhard Willem 29
#2 Pierson Henri G W 10
#3 Enri Herarudo Buiriiemu Pierus 7
#4 Henri Geehaado Uiremu Pieeruso 3
#5 Pierson Henry Gerhard 1
#6 Pierson Henri Gerhart Willem 1

Latest patents

Publication Filing date Title
GB9723403D0 Filter press apparatus
GB9711358D0 Filter press apparatus
GB9709169D0 Endless belt filter
GB9601007D0 Conical filtering centrifuge
GB9517076D0 Distillation process
GB9321972D0 Filter press apparatus
JPH06277417A Filter
GB9219062D0 Separation method
GB9209125D0 Filter apparatus
GB9207529D0 Horizontal belt filter
GB9118113D0 Slide valve
GB9107579D0 Filter
JPH03211155A Web guide mechanism
JPH0377611A Filtering and drying and apparatus therefor
GB8917073D0 Filtration apparatus
GB8912694D0 A double valve arrangement for use in intermittent vacuum filter apparatus
GB8912742D0 Horizontal belt vacuum filtration apparatus
GB8820005D0 Filtration apparatus with integral microwave drying
GB8808115D0 Intermittent vacuum filter apparatus incorporating a double valve arrangement
GB8726061D0 Continuous pressure filter