Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6348592 | Method of making dihydroperimidine squaraine compounds | Louis F. Valente, Lori S. Bernard | 2002-02-19 |
| 6329128 | Stable antihalation materials for photographic and photothermographic elements | Randall H. Helland, Charles W. Gomez | 2001-12-11 |
| 5763134 | Composition comprising photochemical acid progenitor and specific squarylium dye | Stanley C. Busman, Richard J. Ellis, Jeanne E. Haubrich, Tran V. Thien, Gregory D. Cuny | 1998-06-09 |
| 5625062 | Method of making soluble squaraine dyes | Roger A. Mader, Terence D. Spawn, Daniel E. Saddoris | 1997-04-29 |
| 5395747 | Stabilized thermal-dye-bleach constructions | Randall H. Helland, Roger A. Mader | 1995-03-07 |
| 5384237 | Quaternary-ammonium phenylsulfonylacetate thermal-dye-bleach agents | Dian E. Stevenson, Mark P. Kirk, Sylvia A. Farnum, William C. Frank, Randall H. Helland +7 more | 1995-01-24 |
| 5380635 | Dihydroperimidine squarylium dyes as antihalation and acutance materials for photographic and photothermographic articles | Charles W. Gomez, Lori S. Harring, Randall H. Helland, Tran Van Thien | 1995-01-10 |
| 5324627 | Tetra-alkylammonium phenylsulfonylacetate thermal-dye-bleach agents | Dian E. Stevenson, Mark P. Kirk, Sylvia A. Farnum, William C. Frank, Randall H. Helland +7 more | 1994-06-28 |
| 5314795 | Thermal-dye-bleach construction comprising a polymethine dye and a thermal carbanion-generating agent | Randall H. Helland, Sylvia A. Farnum, Mark P. Kirk, Jonathan P. Kitchin, Roger A. Mader +6 more | 1994-05-24 |