RK

Richard J. Kempf

EA E.I. Du Pont De Nemours And: 5 patents #1,460 of 8,010Top 20%
📍 Towanda, PA: #46 of 182 inventorsTop 30%
🗺 Pennsylvania: #15,920 of 74,527 inventorsTop 25%
Overall (All Time): #1,052,283 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
5741621 Process for using photoimageable films prepared for aqueous photoimageable liquid emulsions John Choi, Harvey Walter Taylor, Jr. 1998-04-21
5145760 Positive-working photosensitive electrostatic master with improved invironmental latitude Graciela Beatriz Blanchet-Fincher, Catherine T. Chang 1992-09-08
4945020 Photosensitive leuco dye containing electrostatic master with printout image Rolf Dessauer, Steven C. Freilich 1990-07-31
4859551 Process for preparing positive and negative images using photohardenable electrostatic master 1989-08-22
4716093 Solvent developable photoresist composition and process of use 1987-12-29