Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4781899 | Purification of crystallized solids made via continuous crystallization | Henry A. Pfeffer | 1988-11-01 |
| 4654204 | Production of sodium bicarbonate by reversion of soda-type feed salt | William C. Copenhafer, Henry A. Pfeffer | 1987-03-31 |
| 4288419 | Enhanced recovery of sodium carbonate from NaCl-containing sodium carbonate solutions | William C. Copenhafer | 1981-09-08 |