Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4525240 | Dissolution of metals utilizing tungsten | Walter Burger | 1985-06-25 |
| 4522683 | Dissolution of metals utilizing tungsten-diol combinations | Walter Burger | 1985-06-11 |
| 4437931 | Dissolution of metals | Walter Burger | 1984-03-20 |
| 4297257 | Metal stripping composition and method | Narendra K. Shah | 1981-10-27 |
| 4236957 | Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.Y --H.sub.2 O.sub. -mercapto containing heterocyclic nitrogen etchant | Silvester P. Valayil | 1980-12-02 |
| 4233112 | Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.4 -H.sub.2 O.sub.2 -polysulfide etchant | Silvester P. Valayil | 1980-11-11 |
| 4233113 | Dissolution of metals utilizing an aqueous H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 -thioamide etchant | Silvester P. Valayil | 1980-11-11 |
| 4233111 | Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.4 -H.sub.2 O.sub.2 -3-sulfopropyldithiocarbamate etchant | Silvester P. Valayil | 1980-11-11 |