P

Inventor

ENDO KEIJI

JP69 patents
⚠️ This page may combine multiple inventors who share the name “ENDO KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NIPPON PETROCHEMICALS CO LTD

29 patents
US4618914AOct 21, 1986

Electrical insulating oil and oil-filled electrical appliances

NIPPON PETROCHEMICALS CO LTD280 citations99
US5017733AMay 21, 1991

Electrical insulating oil composition

NIPPON PETROCHEMICALS CO LTD51 citations96
US4543207ASep 24, 1985

Electrical insulating oil and oil-filled electrical appliances

NIPPON PETROCHEMICALS CO LTD76 citations96
US4734824AMar 29, 1988

Electrical insulating oil and electrical appliances impregnated with the same

NIPPON PETROCHEMICALS CO LTD35 citations92
US4681980AJul 21, 1987

Method for improving an electrical insulating hydrocarbon

NIPPON PETROCHEMICALS CO LTD32 citations92
US4642730AFeb 10, 1987

Electrical insulating oil and oil-filled electrical appliances

NIPPON PETROCHEMICALS CO LTD32 citations92
US4621302ANov 4, 1986

Electrical insulating oil and electrical appliances impregnated with the same

NIPPON PETROCHEMICALS CO LTD44 citations92
US4549034AOct 22, 1985

Refined electrical insulating oil and oil-filled electrical appliances

NIPPON PETROCHEMICALS CO LTD39 citations92
US4493943AJan 15, 1985

Electrical insulating oil and oil-filled electrical appliances

NIPPON PETROCHEMICALS CO LTD41 citations92
US4347169AAug 31, 1982

Electrical insulating oil and oil-filled electrical appliances

NIPPON PETROCHEMICALS CO LTD32 citations92
US5015793AMay 14, 1991

Electrical insulating oil composition

NIPPON PETROCHEMICALS CO LTD21 citations82
US5107395AApr 21, 1992

Method of producing insulating oil comprising dibenzylbenzene

NIPPON PETROCHEMICALS CO LTD9 citations74
US5081758AJan 21, 1992

Electrical insulating oil composition and capacitors prepared therewith

NIPPON PETROCHEMICALS CO LTD8 citations74
US5081757AJan 21, 1992

Electrical insulating oil composition and capacitors prepared therewith

NIPPON PETROCHEMICALS CO LTD6 citations74
US4902841AFeb 20, 1990

Method for producing electrical insulating oil composition

NIPPON PETROCHEMICALS CO LTD10 citations74
US4899009AFeb 6, 1990

Method for producing m-benzyltolune

NIPPON PETROCHEMICALS CO LTD8 citations74
US4870221ASep 26, 1989

Oil-filled capacitor

NIPPON PETROCHEMICALS CO LTD8 citations74
US4639833AJan 27, 1987

New electrical insulating oil and oil-filled electrical appliances

NIPPON PETROCHEMICALS CO LTD6 citations74
US4591948AMay 27, 1986

Oil-filled capacitor

NIPPON PETROCHEMICALS CO LTD7 citations74
US4568793AFeb 4, 1986

Electrical insulating oil and oil-filled electrical appliances

NIPPON PETROCHEMICALS CO LTD6 citations74
US4506107AMar 19, 1985

Electrical insulating oil and oil-filled electrical appliances

NIPPON PETROCHEMICALS CO LTD16 citations74
US4442027AApr 10, 1984

Electrical insulating oil composition

NIPPON PETROCHEMICALS CO LTD17 citations74
US4686548AAug 11, 1987

Pressure-sensitive recording material

NIPPON PETROCHEMICALS CO LTD10 citations73
US5171906ADec 15, 1992

Process for treating by-product oil

NIPPON PETROCHEMICALS CO LTD5 citations63
US5113029AMay 12, 1992

Electric insulating oil composition

NIPPON PETROCHEMICALS CO LTD3 citations63
US4982025AJan 1, 1991

Electrical insulating oil comprising improved fraction

NIPPON PETROCHEMICALS CO LTD6 citations63
US4750083AJun 7, 1988

Electrical insulating oil composition

NIPPON PETROCHEMICALS CO LTD3 citations63
US4716084ADec 29, 1987

Oil-impregnated capacitor

NIPPON PETROCHEMICALS CO LTD3 citations63
US4670348AJun 2, 1987

Electrical appliance impregnated with a curable impregnant composition

NIPPON PETROCHEMICALS CO LTD2 citations63

KAO CORP

9 patents

BAYER CROPSCIENCE AG

4 patents

MITSUBISHI PETROCHEMICAL CO

2 patents

AVENTIS CROPSCIENCE GMBH

2 patents

FUJI XEROX CO LTD

2 patents

FUJI XEROX ENGINEERING CO LTD

1 patent

LION FAT OIL CO LTD

1 patent

Showing the top 50 of 69 patents by PatentIndex Score.