Learn more

HOKKAIDO TANKO KISEN KABUSHIKI

Overview
  • Total Patents
    18
About

HOKKAIDO TANKO KISEN KABUSHIKI has a total of 18 patent applications. Its first patent ever was published in 1959. It filed its patents most often in Germany, France and United Kingdom. Its main competitors in its focus markets basic materials chemistry, macromolecular chemistry and polymers and organic fine chemistry are MARDEN ANSTALT, HOENIG MAX and DUENGEMITTEL TECHNIK A G.

Patent filings in countries

World map showing HOKKAIDO TANKO KISEN KABUSHIKIs patent filings in countries
# Country Total Patents
#1 Germany 4
#2 France 4
#3 United Kingdom 4
#4 Canada 3
#5 United States 3

Patent filings per year

Chart showing HOKKAIDO TANKO KISEN KABUSHIKIs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Higuchi Kozo 8
#2 Tsuyuguchi Michio 7
#3 Osa Tetsuro 4
#4 Ando Koji 4
#5 Kozo Higuchi 3
#6 Michio Tsuyuguchi 3
#7 Yonemoto Setsuko 2
#8 Tetsuro Osa 2
#9 Koji Ando 2
#10 Setsuko Yonemoto 1

Latest patents

Publication Filing date Title
US3030412A Method of manufacturing ammonium nitrohumate
US3114625A Preventing reversion by the addition of nitro-humic acid or alkali salts thereof
GB886951A Phosphate fertilizer composition and the method of manufacture thereof
US3153666A Method for continuously producing nitrohumic acids
GB904953A Method and apparatus for producing continuously nitrohumic acids
GB861897A Process for the selective extraction of aromatic hydrocarbons from a mixture of both aromatic and non-aromatic hydrocarbons
CA683758A Method of manufacturing ammonium nitrohumate
CA623414A Phosphate fertilizer composition and the method of manufacture thereof
CA677145A Method and apparatus for producing continuously nitrohumic acids