Inventor · disambiguated record

Katsumi Usui

Also filed as: USUI KATSUMI

2 granted patents·9 citations·filing 1989–1995

53Inventor score

Technology areasC08F C08L

Files withNIPPON OIL CO LTD2

Top patents by PatentIndex Score

2 records

0138US4929680APreparation method of masterbatch composition for thermoplastic resin modificationNIPPON OIL CO LTD·Filed 1989·Granted May 29, 1990·7 cites·10 claims
0229US5541271AProcess for preparing polyolefinsNIPPON OIL CO LTD·Filed 1995·Granted Jul 30, 1996·2 cites·13 claims

Join the waitlist — get patent alerts

Get an alert when Katsumi Usui files or is granted a new patent.

We store only your email — no account needed. See our privacy policy.

Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →