Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8152915 | Process for preparation of a novel pigmented composition for use in gravure inks | Thomas Healy | 2012-04-10 |
| 5449774 | Production of beta form pigmentary copper phthalocyanine | Michael McFarlane, Robert Langley | 1995-09-12 |
| 5279654 | Phthalocyanine pigment compositions | David Keirs, Robert Langley | 1994-01-18 |
| 4920217 | Production of dimethylaminomethyl copper phthalocyanine | Paul I. W. Yarrow, Robert Langley, Colin D. Campbell | 1990-04-24 |