Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6351871 | Aqueous quaternary ammonium hydroxide as a screening mask cleaner | Krishna G. Sachdev, John T. Butler, Michael E. Cropp, Donald W. DiAngelo, John F. Harmuth +7 more | 2002-03-05 | $26,874,000 |
| 6280527 | Aqueous quaternary ammonium hydroxide as a screening mask cleaner | Krishna G. Sachdev, John T. Butler, Michael E. Cropp, Donald W. DiAngelo, John F. Harmuth +7 more | 2001-08-28 | $18,210,000 |
| 6032683 | System for cleaning residual paste from a mask | Jon A. Casey, Michael E. Cropp, Donald W. DiAngelo, John F. Harmuth, John U. Knickerbocker +8 more | 2000-03-07 | $24,867,000 |
| 5916374 | Optimized in-line mask cleaning system | Jon A. Casey, Michael E. Cropp, Donald W. DiAngelo, John F. Harmuth, John U. Knickerbocker +8 more | 1999-06-29 | $36,828,000 |