B41M 5/1366
Characterised solely by tri methane derivatives
Official title: {characterised solely by tri (aryl or hetaryl)methane derivatives (B41M5/1363 takes precedence)}
B41M5/1366 (Characterised solely by tri methane derivatives) appears on 55 US grants and 0 published applications in this corpus.
Search patents in B41M- Granted patents
- 55
- Published applications
- 0
- Assignees
- 22
- Inventors
- 65
- Latest grant
- 26 Dec 1995
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Pressure sensitive recording materials26 Dec 1995US 5,478,793 AKanzaki Paper Manufacturing Co., Ltd.
- Colorant for use in business recording26 Sep 1995US 5,453,522 AIndiana University Foundation
- N-substituted triarylmethane sulfonamides and method of preparation21 Mar 1995US 5,399,709 APolaroid Corporation
- Reversible redox-controlled imaging method26 Jul 1994US 5,332,654 APolaroid Corporation
- Reversible redox-controlled imaging methods2 Nov 1993US 5,258,279 APolaroid Corporation
No published applications in this class yet.
Most cited
By later US patents
- Method of quantitatively measuring an oxidative substance using triphenyl methane type leuco-pigment as a coloring substance45US 4,778,753 AWako Pure Chemical Industries, Ltd. · 1988
- Coated pressure-sensitive recording material32US 3,995,088 ACiba-Geigy Corporation · 1976
- Pressure-sensitive recording materials21US 3,958,815 AAgfa-Gevaert · 1976
- Process for the production of triaryl methane compounds20US 4,533,499 ACiba-Geigy Corporation · 1985
- Pressure-sensitive or heat-sensitive recording material containing a carbazolyl methane compound15US 4,154,463 ACiba-Geigy Corporation · 1979