Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4657946 | Paper sizing method and emulsion | Dominic S. Rende | 1987-04-14 | $2,169,000 |
| 4383889 | Pulp refining process and additive therefor | James Hyde, David R. Cosper, Roy I. Kaplan | 1983-05-17 | $6,081,000 |
| 4298428 | Use of additives in pulp bleaching processes to preserve pulp strength | David R. Cosper | 1981-11-03 | $2,045,000 |
| 4295928 | Phenolic compounds as viscosity preservatives during hypochlorite pulp bleaching | — | 1981-10-20 | $1,538,000 |