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GRAESSER LTD R

Overview
  • Total Patents
    21
About

GRAESSER LTD R has a total of 21 patent applications. Its first patent ever was published in 1953. It filed its patents most often in United Kingdom, Canada and Germany. Its main competitors in its focus markets chemical engineering, measurement and organic fine chemistry are KALTCHEV ROUMEN, LUOYANG GREEN ENVIRONMENTAL PROT ENGINEERING CO LTD and PERMO SA.

Patent filings in countries

World map showing GRAESSER LTD Rs patent filings in countries
# Country Total Patents
#1 United Kingdom 7
#2 Canada 2
#3 Germany 2
#4 Denmark 2
#5 United States 2
#6 Belgium 1
#7 Switzerland 1
#8 Finland 1
#9 France 1
#10 Sweden 1
#11 Zambia 1

Patent filings per year

Chart showing GRAESSER LTD Rs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Coleby John 10
#2 Knowles Kenneth 2
#3 John Coleby 2
#4 Coleby Johu 1
#5 Graesser Norman Hugo 1
#6 Collier Geoffrey Louis 1
#7 Singleton Frank 1
#8 Coleby J 1

Latest patents

Publication Filing date Title
GB1255346A Paraxylene production
CH508413A Liquid treatment of solids
ZM3869A1 Improvements in treatment of solids with liquids
US3649209A Treatment of solids with liquids
DE1913955A1 Liquid treatment of solids
GB1145894A Improvements in treatment of solids with liquids
GB1037573A Improvements relating to apparatus for contacting liquids
GB972035A Improvements relating to apparatus for contacting liquids
GB963117A Improvements relating to apparatus for contacting liquids
GB860880A Improvements relating to apparatus for contacting liquids
GB760729A Improvements in or relating to spectroscopes
CA687199A Apparatus for contacting liquids
CA868784A Treatment of solids with liquids