Patents in Class 549/226

Matches 1 - 50 out of 85

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Match	Document	Document Title
1	7615377	Fluorescein-based metal sensors The present invention is directed, in part, to fluorescein-based ligands for detection of metal ions, and methods of making and using the same.
2	7399639	Sensors, and methods of making and using the same The present invention is directed, in part, to sensors for detecting metal ions, and methods of making and using the same.
3	6916925	Dye labeled imidazoquinoline compounds Dye labeled imidazonaphthyridine, imidazopyridine and imidazoquinoline compounds having immune response modulating activity are disclosed. The compounds arc useful, inter alia, for determining the...
4	6635602	Preparation process for manufacture and purification of mixtures of fluoran compounds and recording material comprising said mixtures of fluoran compounds A process for the manufacture of mixtures of fluoran compounds by the reaction of keto acids of formula (II) with a compound of formula (III) in the presence of a dehydrating condensation agent,...
5	6605731	Magenta colorants Novel addition products of isocyanates with oxyalkylene-substituted aminophenol compounds as intermediates for the production of urethane-substituted xanthene colorants, particularly...
6	6452020	Methods of making magenta colorants for ink systems Novel addition products of isocyanates with oxyalkylene-substituted aminophenol compounds as intermediates for the production of urethane-substituted xanthene colorants, particularly...
7	6162931	Fluorinated xanthene derivatives The family of dyes of the invention are fluoresceins and rhodols that are directly substituted on one or more aromatic carbons by fluorine. These fluorine-substituted fluorescent dyes possess...
8	6143904	Color former mixture The invention describes a color former mixture comprising (a) a compound of formula (1) and/or of formula (2) and/or of formula (3) and (b) a compound of formula (4), or a color former...
9	6130101	Sulfonated xanthene derivatives The present invention describes xanthene dyes, including rhodamines, rhodols and fluoresceins that are substituted one or more times by a sulfonic acid or a salt of a sulfonic acid. The dyes of the...
10	5376617	Crystal modification of 2-(3-methylanilion)-3-methyl-6-diethylamino-fluoran, process for the preparation thereof, and recording materials containing said crystal modification The improved β-type crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran has high solubility in inner-phase solvents. The compound is very useful as a color former for...
11	5338866	Crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran, process for the preparation thereof, and recording materials containing said crystal modification The improved β-type crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran has high solubility in inner-phase solvents. The compound is very useful as a color former for...
12	5331097	Poly(oxyalkylene) substituted xanthene colorant and method for making the same A diamino-xanthene colorant is provided having the following structure: ##STR1## where Y is a poly(oxyalkylene) substituent having a straight or branched polymer chain of at least 3 monomer units...
13	5324704	Fluoran compounds, crystalline toluene adducts thereof, recording material comprising same and process for their preparation Disclosed are novel fluoran compounds represented by the formula (I): ##STR1## wherein R 1 and R 2 are different groups selected from cyclohexyl, n-butyl and isobutyl, e.g., in the form of...
14	5315015	Compounds having improved fluorescence in fluorescence polarization immunoassays and immunoassays utilizing same Compounds of the formula ##STR1## wherein F is a fluorescing compound; Y is --NH-- or a single covalent bond; Z is a straight or branched alkylene chain of 2 to 10 carbon atoms which is substituted...
15	5300661	Process for preparation of a recording material comprising a novel crystal of a fluoran compound Disclosed are novel crystal of the fluoran compound represented by the formula (I) ##STR1## ,characterized by a specific X-ray diffraction diagram; preparation process thereof; and recording...
16	5283222	Recording material comprising novel crystalline fluoran and process for prepartion of the said crystalline fluoran Disclosed are novel crystal of the fluoran compound represented by the formula (I) ##STR1## , characterized by a specific X-ray diffraction diagram; preparation process thereof; and recording...
17	5274155	Intramolecular arbuzov process for the preparation of intermediates useful in the preparation of phosphorus containing HMG-COA reductase inhibitors A process for the preparation of compounds of formula ##STR1## and pharmaceutically acceptable salts thereof; wherein X is --CH 2 --, --CH 2 CH 2 --, --CH 2 CH 2 CH 2 --, --CHCH--,...
18	5250708	Poly(oxyalkylene) substituted aminophenol intermediate and xanthene colorant A poly(oxyalkylene) substituted xanthene colorant is providing having the following structure: ##STR1## where Y is a poly(oxyalkylene) substituent having a straight or branched polymer chain of...
19	5244769	Light-sensitive image forming material A light-sensitive image-forming material is disclosed, comprising a support having thereon a recording layer containing a leuco dye which forms color upon oxidative development, a photo-oxidizing...
20	5210221	Crystal of fluoran compound and preparation process of the crystal Disclosed are a crystal of a fluoran compound having the formula (I) comprising exhibiting high peaks at diffraction angles (2θ) of 7.5° and 17.0° and relatively high peaks at diffraction angles...
21	5208209	Fluoran compounds, process for preparation thereof and recording materials comprising said compound Novel fluoran compounds represented by the formula (I): ##STR1## wherein R 1 is an alkyl group having from 1 to 4 carbon atoms, preparation process of the fluoran compounds, and a heat-sensitive...
22	5185453	Crystal of fluoran compound Disclosed are novel crystal of the fluoran compound represented by the formula ##STR1## , characterized by a specific X-ray diffraction diagram; preparation process thereof; and recording materials...
23	5166350	Process for the manufacture of fluoran compounds A process for the preparation of a fluoran compound of the formula ##STR1## wherein R, R 1 , R 2 and R 4 are each independently hydrogen, halogen, lower alkyl or lower alkoxy, R 3 is...
24	5110952	Method of producing 3-dibutylamino 6-methyl-7-anilinofluoran A method of producing a high melting point 3-dibutyl amino-6-methyl-7-anilinofluoran characterized by peaks at diffraction angle (2 θ) of 6.9°, 11.0°, 18.5° and 18.9° in X-ray diffractiometry...
25	5017710	Fluoran compound and coloring recording material using it Fluoran compounds represented by the general formula (I) ##STR1## (where R is an alkyl group having 9 to 12 carbon atoms) and coloring recording materials containing the said compounds as coloring...
26	4992560	Method of preparing novel fluorinated laser dyes A novel class of dye is disclosed which is particularly efficient and stable for dye laser applications, lasing between 540 and 570 nm.
27	4977278	Preparation of rhodamine dyes in granule form by direct cooling Salts of esterified rhodamine dyes are prepared in granular form by precipitating the rhodamine dyes with sodium chloride from an aqueous medium containing a water-miscible solvent by adding the...
28	4954631	Fluoran compounds and color forming recording materials using same Fluoran compounds are disclosed of formula (I) ##STR1## wherein R 1 , R 2 , R 3 and R 4 independently represent hydrogen, halogen, lower alkoxy, C 1 -C 9 -alkyl, C 5 or C 6 -cycloalkyl,...
29	4833256	Fluoran derivatives and recording material containing the same A fluoran derivative useful for a heat-sensitive recording material, having the following general formula I; ##STR1## wherein R 1 and R 2 , which may be the same or different, stand for an alkyl...
30	4826976	Color-shifted dyes with thermally unstable carbamate moiety comprising T-alkoxycarbonyl group This invention relates to a color-shifted dye compounds containing at least one thermally unstable carbamate moiety which are useful in thermal imaging. These compounds may be represented by the...
31	4806657	Process for the preparation of fluoran compounds which are substituted by basic groups A process for the preparation of fluoran compounds which are substituted by basic groups and have the formula ##STR1## wherein R 1 , R 2 and R 3 are each independently hydrogen, halogen or lower...
32	4749796	Xanthene derivative and a production process of the same This invention relates to a xanthene derivative that develops color on oxidation, so that it is favorably used for a photoresist, a PS plate or a proofing agent. The xanthene derivative, which has...
33	4727162	Molecular compound of fluoran compound and ketone A molecular compound of a fluoran compound and a ketone useful as a color former for heat or pressure-sensitive color-developable recording material.
34	4695640	Addition compound of fluoran compounds and ketone Addition compound of fluoran compound and ketone useful as color former for heat or pressure-sensitive color-developable recording material.
35	4694088	Fluoran compounds A fluoran compound represented by general formula (I): ##STR1## wherein R 1 represents a straight or branched alkyl group having 1 to 8 carbon atoms, a cyclohexyl (C 1 -C 2 ) alkyl group, a...
36	4665199	3-N-isobutylethylamino-6-methyl-7-phenylaminofluoran 3-N-isobutylethylamino-6-methyl-7-phenylamino fluoran of formula (I) ##STR1## is described.
37	4642357	Chromogenic recording materials A compound of the formula (I) ##STR1## wherein R is methyl or ethyl, useful in chromogenic recording materials, is described.
38	4629800	Fluoran compounds Fluoran compounds of the structural formula: ##STR1## wherein R 1 is propyl or butyl, R 2 is an alkyl of from one to four carbon atoms, R 3 is methyl or ethyl, and R 4 is hydrogen or methyl are...
39	4612558	Fluoran compounds A fluoran compound having the formula: ##STR1## wherein each of R 1 and R 2 is a hydrogen atom, a straight chain or branched alkyl group having from 1 to 8 carbon atoms, a cyclohexyl group, a...
40	4603202	Fluoran colorants for recording systems Fluorans of the formula (I) ##STR1## where R 1 is hydrogen or methyl, R 2 is hydrogen or unsubstituted or substituted alkyl, R 3 is hydrogen, unsubstituted or substituted alkyl, cycloalkyl or...
41	4597795	6-tetrahydrofurfurylaminofluoran compound useful as a color former A novel 6-tetrahydrofurfurylaminofluoran compound useful as a color former (precursory colorant) for a heat-sensitive recording sheet is of the formula (I): ##STR1## wherein R 1 is H, C 1 -8...
42	4536220	Fluoran derivatives as new compounds and recording system utilizing the same as colorless chromogenic material A new fluoran derivative useful as a colorless chromogenic material has the following formula: ##STR1## wherein R, R 1 , R 2 , R 3 , X and Y have the same meaning as defined hereinbefore.
43	4473498	Water-soluble, fiber-reactive organic dyestuffs containing a β-chloro-ethylsulfonyl-methyl-benzoic acid amide group Novel organic, water-soluble compounds having fiber-reactive and fiber-finishing properties and containing, as a fiber-reactive group, one or two β-chloroethylsulfonylmethyl-benzoic acid amide...
44	4444591	Chromogenic compounds and the use thereof as color former in copying or recording materials Novel chromogenic fluoran compounds of the formula: ##STR1## wherein R 1 is selected from the group consisting of alkyl radicals of from five to eight carbon atoms; R 2 is selected from the group...
45	4414399	5/6 Carboxyphthalides Dialkylamino-substituted 2-anilino-5'/6'-carboxyfluorans, 2-amino and substituted amino-5'-6'-carboxyfluorans, 1,3-dialkyl-5'/6'-carboxyfluorans, esterified dialkylamino-substituted...
46	4410708	Chromogenic fluoran derivatives and the preparation and use thereof Certain 3-substituted amino-7-substituted fluoran derivatives useful as color recording materials.
47	4364999	Heat sensitive record sheet A heat sensitive record sheet comprises a coated layer comprising 2-(2-chlorophenyl)amino-6-di-propyl- or butyl-aminofluoran derivative.
48	4341403	Fluoran compounds, process for preparation thereof, and recording sheets using same A fluoran compound represented by the formula: ##STR1## wherein R 1 and R 2 each represents an alkyl group containing up to 18 carbon atoms, R 3 represents an alkyl group, a halogenated alkyl...
49	4330473	Recording material The present invention discloses novel fluoran compound useful as the lactone electron donative color-forming agents having the general formula: ##STR1## wherein, R 1 , R 2 and R 4 are...
50	4302393	Fluoran compounds Fluoran compounds of the formula ##STR1## wherein one of R 1 , R 2 , R 3 and R 4 represents n-alkyl having 6 to 12 carbon atoms and the other R's, independently of each other, represent hydrogen,...

Matches 1 - 50 out of 85

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