Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5395728 | Hexahydroxybenzophenone sulfonate esters of diazonaphthoquinone sensitizers and positive photoresists employing same | Wells Cunningham | 1995-03-07 |
| 5294521 | Positive photoresists employing an isomeric mixture of two hexahydroxybenzophenone esters of diazonaphthoquinone sensitizers | Wells Cunningham | 1994-03-15 |
| 5206348 | Hexahydroxybenzophenone sulfonate esters of diazonaphthoquinone sensitizers and positive photoresists employing same | Wells Cunningham | 1993-04-27 |