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Your search returned 61 patents.
( 549/224 in Current US Classification ) |
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| 1 |
| Patent ID | Title | Date Filed |
| 5231069 | Fluoran compound, heat sensitive recording materials comprising fluoran compound
| December 4, 1992 |
| 5220038 | Fluoran compounds, crystalline toluene adducts thereof, recording material comprising same and process for their preparation
| July 18, 1990 |
| 5194632 | Fluoran compound, useful in heat sensitive recording materials
| July 31, 1990 |
| 5188934 | 4,7-dichlorofluorescein dyes as molecular probes
| November 14, 1989 |
| 5166350 | Process for the manufacture of fluoran compounds
| September 30, 1991 |
| 5055595 | Etherified fluorescein compounds
| November 14, 1989 |
| 5055594 | Fluorogenic trypotophanase substrates
| July 19, 1990 |
| 4954631 | Fluoran compounds and color forming recording materials using same
| February 2, 1989 |
| 4945171 | Xanthene dyes having a fused (C) benzo ring
| August 10, 1987 |
| 4933471 | Xanthene dyes
| August 31, 1988 |
| 4826976 | Color-shifted dyes with thermally unstable carbamate moiety comprising T-alkoxycarbonyl group
| December 18, 1987 |
| 4775656 | Recording material containing leuco dye
| October 30, 1987 |
| 4687862 | Fluoran compounds
| October 14, 1986 |
| 4668967 | Fluoran compound and color forming record materials using the same
| May 28, 1986 |
| 4603202 | Fluoran colorants for recording systems
| October 12, 1984 |
| 4410708 | Chromogenic fluoran derivatives and the preparation and use thereof
| February 3, 1976 |
| 4362668 | Substituted ortho-quinone dimer
| July 31, 1979 |
| 4215102 | Cytochemical agents and methods for the detection of steroid hormone receptors in human tissues
| January 5, 1979 |
| 4213904 | Fluorescent labeling reagents containing the fluorescein and eosin chromophores
| February 28, 1979 |
| 4156682 | Fluoran compounds and recording sheet containing them
| October 21, 1976 |
| 4024157 | Fluoran compounds and recording sheet containing them
| October 1, 1974 |
| 3997561 | Pressure sensitive copying paper
| December 15, 1971 |
| 3996212 | Fluoran compounds
| January 9, 1975 |
| 3985930 | Cyclopolymethylenefluoran compounds
| March 4, 1976 |
| 3970671 | Chromogenic compounds and method for preparation thereof
| July 23, 1974 |
| 3947471 | Benz (c) fluoran compounds and recording sheet containing them
| May 20, 1974 |
| 3925457 | Substituted o-[4-(n-alkyl-n-phenylamino)-2-hydroxybenzoyl]-benzoic acid
| September 9, 1974 |
| 3925416 | Benz[c]fluoran compounds and recording sheet containing the same
| June 27, 1974 |
| 3901918 | Fluoran compounds
| October 27, 1972 |
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