Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5807668 | Hardening of hydrophilic colloids | Timothy D. Weatherill, Rolf Weberg | 1998-09-15 |
| 5601971 | Hardening of hydrophilic colloids with imidazolium and triazine combinations | Richard R. Jones, Reinhold R uger, Timothy D. Weatherill, Rolf Weberg | 1997-02-11 |
| 5591863 | Imidazolium hardeners for hydrophilic colloids | Timothy D. Weatherill, Rolf Weberg | 1997-01-07 |
| 5527665 | Imidazolium hardeners | Timothy D. Weatherill, Rolf Weberg | 1996-06-18 |
| 5470986 | Imidazolium hardeners for hydrophilic colloid | Timothy D. Weatherill, Rolf Weberg | 1995-11-28 |
| 5459029 | Photographic element hardened with imidazolium hardeners | Richard R. Jones, Rolf Weberg | 1995-10-17 |
| 5384232 | Process for rapid access development of silver halide films using pyridinium as development accelerators | Julie C. Bishop, Dominic M. Chan, Dennis S. Donald, William R. Pangratz, Glenn M. Russo +1 more | 1995-01-24 |
| 5378842 | Imidazolium hardeners for proteinaceous materials | Richard R. Jones, Rolf Weberg | 1995-01-03 |
| 5147756 | Stabilized, aqueous hydrazide solutions for photographic elements | — | 1992-09-15 |