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HART CHEMICAL LTD

Overview
  • Total Patents
    25
About

HART CHEMICAL LTD has a total of 25 patent applications. Its first patent ever was published in 1970. It filed its patents most often in Canada, United States and Spain. Its main competitors in its focus markets chemical engineering, textiles and paper and macromolecular chemistry and polymers are GUANGDONG ZHONGLIANBANG FINE CHEMICAL CO LTD, WU JINLONG and GOLDEN TECH CO.

Patent filings in countries

World map showing HART CHEMICAL LTDs patent filings in countries
# Country Total Patents
#1 Canada 10
#2 United States 7
#3 Spain 2
#4 Finland 2
#5 Sweden 2
#6 Brazil 1
#7 Japan 1

Patent filings per year

Chart showing HART CHEMICAL LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Schell Frederick S 8
#2 Shane Hugh J S 8
#3 Licht Brigitte H 6
#4 Shane H 5
#5 Kanluen Ratana 4
#6 Lilley J 3
#7 Schill J 3
#8 Schill John E 2
#9 Kasem Mohammad A 2
#10 Schell F S 2

Latest patents

Publication Filing date Title
US4874827A Production of highly-dispersible water-soluble polymers
CA1291964C Production of highly-dispersible water-soluble polymers
CA1274803A Vinyl monomer polymerization in presence of photoinitiator and chemical
CA1261881A Low foaming surfactant
CA1061677A Water-dispersible defoamer composition
US4024072A Water-dispersible defoamer composition
US4088601A Water-emulsifiable defoamer composition
CA1020041A Water-emulsifiable defoamer composition
ES431225A3 Procedure for the obtaining of decomposition compositions. (Machine-translation by Google Translate, not legally binding)
ES430568A3 Procedure for preparing a decomposition composition. (Machine-translation by Google Translate, not legally binding)
CA922456A Method of treatment of pulp mill liquors
CA926261A Defoamer composition
CA943035A Process of production of defoamer compositions
US3730907A Process of production of defoamercompositions
US3723342A Defoamer composition
US3741911A Phosphate-free detergent composition
CA912395A Detergent composition
CA726194A Production of a surface active agent by reacting waste acid from the production of a fatty acid chloride with a nonionic surface active agent