Inventor
SHIRAISHI TAKEICHI
23 patents
⚠️ This page may combine multiple inventors who share the name “SHIRAISHI TAKEICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON OIL CO LTD
21 patentsUS4962167AOct 9, 1990
Process for preparing ultra-high molecular weight polyethylene
NIPPON OIL CO LTD62 citations96
US4396534AAug 2, 1983
Olefin polymerizing catalyst
NIPPON OIL CO LTD28 citations92
US4006101AFeb 1, 1977
Polymerization of olefins and catalysts therefor
NIPPON OIL CO LTD35 citations92
US5756660AMay 26, 1998
Process for producing polyethylene material of high strength and high plastic modulus
NIPPON OIL CO LTD27 citations91
US4209602AJun 24, 1980
Process for the production of polyolefins
NIPPON OIL CO LTD10 citations74
US4209601AJun 24, 1980
Process for the production of polyolefins
NIPPON OIL CO LTD10 citations74
US4093789AJun 6, 1978
Process for preparing polyolefins
NIPPON OIL CO LTD16 citations74
US4061857ADec 6, 1977
Process for preparing polyolefins
NIPPON OIL CO LTD7 citations74
US5463001AOct 31, 1995
Process for preparing polyolefins
NIPPON OIL CO LTD8 citations73
US4315999AFeb 16, 1982
Process for preparing polyolefins
NIPPON OIL CO LTD18 citations73
US4202953AMay 13, 1980
Process for the production of polyolefins
NIPPON OIL CO LTD11 citations73
US4083802AApr 11, 1978
Polymerization of olefins and catalysts therefor
NIPPON OIL CO LTD18 citations73
US5266666ANov 30, 1993
Process for preparing ethylene polymers or copolymers
NIPPON OIL CO LTD19 citations69
US5369193ANov 29, 1994
Process for preparing polyolefins
NIPPON OIL CO LTD5 citations63
US4450243AMay 22, 1984
Carrier for olefin polymerization catalyst
NIPPON OIL CO LTD3 citations63
US4252929AFeb 24, 1981
Process for preparing polyolefins
NIPPON OIL CO LTD6 citations63
US4064334ADec 20, 1977
Process for preparing polyolefins
NIPPON OIL CO LTD6 citations63
US4324876AApr 13, 1982
Process for the production of polyolefins
NIPPON OIL CO LTD4 citations62
US5506183AApr 9, 1996
Catalyst for preparing polyolefins
NIPPON OIL CO LTD5 citations61
US5804679ASep 8, 1998
Process for preparing polyolefins
NIPPON OIL CO LTD1 citations52
US5644008AJul 1, 1997
Process for preparing polyolefins
NIPPON OIL CO LTD1 citations52