JM

John McDonald

Chevron: 1 patents #54 of 178Top 35%
🗺 California: #4,598 of 17,285 inventorsTop 30%
Overall (1997): #127,527 of 185,788Top 70%
1
Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5677270 Methods for preparing normal and overbased phenates Vernon R. Small, Jr., William W. Willis, Jr., Torrey A. Pennebaker, Jean-Louis Le Coent 1997-10-14