YC

Yuehsiung Chang

AM Amoco: 5 patents #148 of 1,251Top 15%
S( Standard Oil Company (Indiana): 1 patents #254 of 576Top 45%
Overall (All Time): #894,712 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4873007 Method for producing sulfurized alkylphenols 1989-10-10
4865754 Lubricant overbased phenate detergent with improved water tolerance 1989-09-12
4680098 Aqueous recovery of cobalt or cobalt and manganese from solution also containing oxygenated aromatic compounds 1987-07-14
4664824 Phenate product and process Larry C. Satek 1987-05-12
4608184 Phenate process and composition improvement 1986-08-26
4519881 Regeneration of alkaline treating agents 1985-05-28