YC

Yuehsiung Chang

AM Amoco: 2 patents #29 of 265Top 15%
📍 Naperville, IL: #18 of 158 inventorsTop 15%
🗺 Illinois: #289 of 3,813 inventorsTop 8%
Overall (1989): #12,195 of 140,708Top 9%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4873007 Method for producing sulfurized alkylphenols — 1989-10-10
4865754 Lubricant overbased phenate detergent with improved water tolerance — 1989-09-12