Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4519806 | Enhanced recovery of soda ash from aqueous sodium carbonate solutions containing Na.sub.2 SO.sub.4 - and NaCl | William C. Copenhafer | 1985-05-28 | $3,010,000 |
| 4344650 | Recovery of alkali values from trona deposits | John Walden | 1982-08-17 | $752,000 |
| 4316879 | Stabilized sodium carbonate peroxide preparation method | Joseph H. Finley, Charles W. Lutz | 1982-02-23 | $5,554,000 |
| 4283372 | Recovery of alkali values from sodium bicarbonate-containing ore with ammonia | William R. Frint, William C. Copenhafer | 1981-08-11 | $1,996,000 |