Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5783038 | Ink jet recording paper incorporating novel precipitated calcium carbonate pigment | Douglas Ward Donigian, Michael Gregory McFadden | 1998-07-21 |
| 5643631 | Ink jet recording paper incorporating novel precipitated calcium carbonate pigment | Douglas Ward Donigian, Michael Gregory McFadden | 1997-07-01 |
| 4980395 | Process for the preparation of large surface area, finely divided precipitated calcium carbonate and filled polymeric compositions of matter containing said calcium carbonate | Krishna K. Mathur, Randall George Simmons | 1990-12-25 |
| 4927618 | Process for the preparation of large surface area, finely divided precipitated calcium carbonate and filled polymeric compositions of matter containing said calcium carbonate | Krishna K. Mathur, Randall George Simmons | 1990-05-22 |