Learn more

JOHN W LEITCH & COMPANY LTD

Overview
  • Total Patents
    12
About

JOHN W LEITCH & COMPANY LTD has a total of 12 patent applications. Its first patent ever was published in 1925. It filed its patents most often in United Kingdom and United States. Its main competitors in its focus markets textiles and paper and basic materials chemistry are TAIXING JINYUN DYESTUFF CO LTD, TAIXING JINYUN DYE CO LTD and ARGUS SHANGHAI TEXTILE CHEMICALS CO LTD.

Patent filings in countries

World map showing JOHN W LEITCH & COMPANY LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 10
#2 United States 2

Patent filings per year

Chart showing JOHN W LEITCH & COMPANY LTDs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

# Technology
#1 Dyeing textiles
#2 Pigments

Top inventors

# Name Total Patents
#1 Ernest Everest Arthur 2
#2 Arthur Wallwork James 2

Latest patents

Publication Filing date Title
US2193557A Dyestuff intermediate
GB492476A Improvements in or relating to dyestuff intermediates
US2193556A Dyestuff intermediate
GB474638A Improvements in or relating to dyestuff intermediates
GB454729A A process for dyeing animal fibres
GB437049A A process for dyeing animal fibres
GB283839A A process for dyeing silk by means of ice colours
GB283838A A process for dyeing wool by means of ice colours
GB283347A A process for dyeing animal fibres, in particular silk, by means of ice colours
GB274550A Improvements relating to vat dyeing
GB272585A Improvements relating to the reduction of pigment colours and lakes to a finely divided state
GB261459A Improvements relating to the manufacture of nitro-derivatives of aromatic amines