Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5397487 | Lubricating oil for inhibiting rust formation | Lilianna Z. Pillon, Andre E. Asselin | 1995-03-14 | $40,890,000 |
| 4837338 | Removal of impurities from n-methyl-pyrrolidone using highly pure water washed activated alumina | Bordan W. Krupay | 1989-06-06 | $24,595,000 |
| 4512878 | Used oil re-refining | Keith C. Yao, Douglas G. Ryan | 1985-04-23 | $18,242,000 |
| 4460453 | Solvent dewaxing waxy bright stock using a combination polydialkyl fumarate-vinyl acetate copolymer and polyalkyl (meth-) acrylate polymer dewaxing aid | David A. Gudelis | 1984-07-17 | $23,028,000 |
| 4439308 | Solvent dewaxing waxy bright stock using a combination polydialkylfumarate-vinyl acetate copolymer and wax-naphthalene condensate dewaxing aid | David A. Gudelis | 1984-03-27 | $24,709,000 |