Learn more

MARUZEN OIL CO LTD

Overview
  • Total Patents
    416
About

MARUZEN OIL CO LTD has a total of 416 patent applications. Its first patent ever was published in 1967. It filed its patents most often in Japan, United States and United Kingdom. Its main competitors in its focus markets macromolecular chemistry and polymers, organic fine chemistry and environmental technology are QUANTUM CHEM CORP, AMOCO CORP and TOA NENRYO KOGYO KK.

Patent filings per year

Chart showing MARUZEN OIL CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Fujiwara Hiroshi 112
#2 Sekiya Masaaki 49
#3 Takahashi Akio 40
#4 Taniguchi Hiroaki 31
#5 Tawara Kinya 28
#6 Matsumoto Osamu 27
#7 Suzuki Hiroshi 24
#8 Kashiki Masayuki 17
#9 Fujii Kinya 17
#10 Suganuma Fujio 17

Latest patents

Publication Filing date Title
JPS60258206A Manufacturae of modified poly-p-vinyl phenol of reduced discoloration
JPS60204795A Production of ether of saccharide and alkenylphenol
JPS60192704A Hydroxystyrene polymer having saccharide side chain and its production
JPS60168794A Production of basic alkaline earth metal phenate detergent
JPS60168793A Production of basic sulfurized alkaline earth metal phenate detergent
JPS60147497A Preparation of salicylate-containing basic alkaline earth metal sulfide phenate type detergent
JPS60127396A Preparation of detergent of basic alkali earth metal salicylate type
JPS6089580A Treating agent for metallic surface
JPS6081228A Addition polymer of hydroxystyrene polymer and phenolic resin and its preparation
JPS6058407A Modification of p-vinylphenol polymer
JPS6032803A Alkyletherified hydroxystyrene polymer containing ester group and its manufacture
JPS6017739A Photosensitive resist for fine working
JPS6017740A Photosensitive resist suitable for fine working
JPS6014233A Electron beam exposure type resist
JPS6015636A X-ray exposure type resist
JPS601146A Production of p-vinylphenol by dehydrogenation of p-ethylphenol
JPS59181231A Production of p-ethylphenol
JPS59181230A Production of p-ethylphenol
JPS59155332A Process for production of p-ethylphenol
JPS59155331A Production of p-ethylphenol