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HICKSON AND WELCH LTD

Overview
  • Total Patents
    19
About

HICKSON AND WELCH LTD has a total of 19 patent applications. Its first patent ever was published in 1963. It filed its patents most often in Canada, United Kingdom and Italy. Its main competitors in its focus markets organic fine chemistry, basic materials chemistry and chemical engineering are HICKSON & WELCH LTD, FINE ORGANICS LTD and PALOMO COLL A L.

Patent filings in countries

World map showing HICKSON AND WELCH LTDs patent filings in countries
# Country Total Patents
#1 Canada 14
#2 United Kingdom 2
#3 Italy 2
#4 France 1

Patent filings per year

Chart showing HICKSON AND WELCH LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Sarkar Asim K 13
#2 Adams Dennis A W 7
#3 Sarkar Asim Kumar 3

Latest patents

Publication Filing date Title
GB1130882A 1,3-diaryl-pyrazolines and their use as optical whitening agents
GB1021193A Triazinylamino stilbene sulphenic acid derivatives
CA790591A Optical whitening agents
CA732217A Phosphorodithiolates and process for the production thereof
CA616759A Optical whitening agents
CA848457A Optical whitening agents
CA615045A Optical whitening agents
CA867394A Optical whitening agents
CA839270A Triazol-styryl whitening agents
CA643978A Optical whitening agents
CA750922A Optical whitening agents
CA717978A Optical whitening agents
CA792771A Optical whitening agents
CA701225A Stilbyl sulfones and preparation
CA630033A Optical whitening agents
CA717538A Optical whitening agents