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Class 552/298 - Chalcogen single bonded directly to the polycyclo ring system


Subclass of Class 552 - Organic compounds -- part of the class 532-570 series
Definition: Compounds wherein the polycyclo ring system has chalcogen
No. of patents: 62
Last issue date: 05/31/2011


1    
NumberTitleIssue Date
7951965Phenanthrene derivatives and organic light-emitting diodes containing said phenanthrene derivative
The present invention discloses a phenanthrene derivative having the following structure: wherein Ar1 and Ar2 independently are phenyl, nathphyl, heterocyclic group, polycyclic aromatic or polycyclic h...
05/31/2011
6967255Phenanthrene compounds
A phenanthrene compound represented by the formula (I): in which, R1, R2, R3, R4, R5, R6, R7, and R8 are identical or different and...
11/22/2005
6600057Matrix metalloproteinase inhibitors
The present invention provides compounds that are effective in treating disorders caused by the enzymatic activity of matrix metalloproteinases. These disorders include, but are not limited to, rheumatoid arthritis, osteoarthritis, periodontal disease, ab...
07/29/2003
6326369Bicyclic quinone compounds, their production and use
A compound of the formula: ##STR1## wherein R1 and R2 each represents a lower alkyl, or R1 and R2 may be bonded together to form a ring; X represents a spacer of which the number of atoms constituting the princi...
12/04/2001
6162799Pesticidal compounds
This invention relates to certain naphthoquinone derivatives of the general formula ##STR1## or a salt thereof, in which m, n, R, R1, R2, R3, R4, R5, R6, R7, R8 a...
12/19/2000
6043286Pesticidal compounds
Pesticidal as a pesticide against whitefly, Lepidoptera and certain fungi is provided of compound of general formula (I) ##STR1## or a salt thereof is provided, in which n represents an integer from 0 to 4; m represents an integer 0 or 1; each R inde...
03/28/2000
6022658Nitro group-containing naphthoquinone derivatives and photosensitive material using the same for electrophotography
A nitro group-containing naphthoquinone derivative represented by the following general formula: ##STR1## wherein R is a monovalent hydrocarbon group having a nitro group, and a ring A may be substituted with a substituent. This compound is a novel s...
02/08/2000
5834515Naphthoquinone derivatives
The invention relates to certain naphthoquinone derivatives, some of which are novel, of the general formula I ##STR1## in which R represents a hydrogen atom or a hydroxyl or an ethanoyloxy group; methods for their preparation; compositions containin...
11/10/1998
5744623Terpene-quinones with antitumour activity
Terpene-quinone with antitumor activity defined from a cyclocondensation reaction of Diels-Alder, used to obtain families or series of said compounds having a new structure and presenting a cytotoxic activity to cellular cultures P-388, A-549, HT-29 and M...
04/28/1998
5696276Process for preparing 5,8-dihydroxynaphthoquinone derivatives, novel 5,8-dihydroxynaphthoquinone derivatives and their use as anticancer agent
5,8-dihydroxynaphthoquinone derivatives represented by the following general formula (IA): ##STR1## in which R1 represents alkyl or alkenyl, R2a represents alkyl or a group --C(O)R wherein R represents alkyl, alkenyl, aryl, aral...
12/09/1997
5686635Tetrahydro-alkenyl-methanonaphthalene-5,8-dione derivatives
Disclosed herein are a quinone derivative represented by the following formula: ##STR1## wherein R1 and R2 are identical with or different from each other and mean individually a lower alkyl or lower alkoxy group, or may fo...
11/11/1997
5679808Tertiary non-linear optical material
The present invention discloses a tertiary non-linear optical material comprising a quinone derivative expressed by any one of the general formulas: ##STR1## wherein R1, R2, R3, R4, R5 and R...
10/21/1997
5674900Terpenoid-type quinones for treatment of diabetes
Novel terpenoid-type quinones which can be obtained from Pycnanthus spp., processes for obtaining the novel terpenoid-type quinones and methods for their use as hypoglycemic agents, for example, in the treatment of diabetes are described. In a preferred e...
10/07/1997
56080921,4,4a 5,8,9a -hexahydro-1଱,4଱-methanoan-thraquinone derivative(s)
The present invention relates to intermediates useful for the preparation of vitamin K derivatives....
03/04/1997
5466711Medicaments
A method for treating or preventing a Pneumocystis carinii infection in a mammal by administering a certain naphthoquinone compound or physiologically acceptable salts thereof....
11/14/1995
5274141Designed quinone- and hydroquinone-containing cyclic enediyneols and enediyneones having DNA cleaving and cytotoxic properties
Quinone- and hydroquinone-containing cyclic enediyneols and enediyneones having 10-carbon atoms in the enediyne-containing ring that cleave DNA are disclosed, as are methods of making and using the same....
12/28/1993
52255782-(1-alkylaminoalkyl)-3-hydroxy-1,4-naphthoquinone, process for its production and processes for producing 2-(1-alkenyl)-3-hydroxy-1,4-naphthoquinone and 2-alkyl-3-acyloxy-1,4-naphthoquinone by using it
A 2-(1-alkylaminoalkyl)-3-hydroxy-1,4-naphthoquinone of the formula: ##STR1## wherein R1 is an alkyl group or a cycloalkyl group, and R2 is an alkyl group having at least 2 carbon atoms....
07/06/1993
5192817Phenanthrene derivatives
Novel phenanthrene derivatives represented by the general formula (1), ##STR1## wherein the group of the formula ##STR2## is a group of the formula ##STR3## (wherein R1 is a hydrogen atom or a lower alkyl group), a group of ...
03/09/1993
5187195Anthraquinone derivatives and preparation thereof
Anthraquinone compounds of the formula: ##STR1## wherein: R1 is hydrogen, hydroxy or acyloxy, R2 is hydrogen or acyl, R3 is acyl, R4 is hydrogen or acyl, R5 is hydrogen or acyl, R6 is hydrogen o...
02/16/1993
5175318Process for the preparation of quinones
Phenols are oxidated to quinones with hydrogen peroxide in the presence of catalytic amounts of bromine, iodine, hydrogen bromide and hydrogen iodide....
12/29/1992
5053432Naphthoquinone derivatives
Novel antiprotozoal naphthoquinones having the general formula ##STR1## (wherein either R1 is hydrogen and R2 is selected from C1-6 alkoxy, aralkoxy, C1-6 alkyl-C1-6 alkoxy, phenyl substituted by ...
10/01/1991
5049236Lignin derived quinonic compound mixtures useful for the delignification of cellulosic materials
A method for the preparation of a mixture of fused ring quinone type compounds from lignin and lignin-derived substances. The mixture of fused ring quinone compounds has been found useful in the wood pulping process as an accelerator in the degradation an...
09/17/1991
49804892-(1-alkylaminoalkyl)-3-hydroxy-1,4-naphthoquinone
A 2-(1-alkylaminoalkyl)-3-hydroxy-1,4-naphthoquinone of the formula: ##STR1## wherein R1 is an alkyl group or a cycloalkyl group, and R2 is an alkyl group having at least 2 carbon atoms. The compounds are used in the preparation of a...
12/25/1990
4970328Pest-combating agents based on substituted 1,4-naphthoquinones and new substituted 1,4-naphthoquinones
A method of combating agricultural pests comprising applying a pesticidally effective amount of a substituted 1,4-naphthoquinone on agricultural pests and/or their environment, said 1,4-naphthoquinone being of the formula ##STR1## in which n represen...
11/13/1990
4952495Hydrolyzable compounds which release electron transfer agents and analytical use of same
Hydrolyzable substrates comprise blocked moieties which, when cleaved from the substrate during hydrolysis, provide electron transfer agents. The released electron transfer agents can be recycled between a reductant and a reducible compound that upon redu...
08/28/1990
4929642Pest-combating agents based on substituted 1,4-naphthoquinones and new substituted 1,4-naphthoquinones
A method of combating agricultural pest comprising applying a pesticidally effective amount of a substituted 1,4-naphthoquinone on agricultural pests and/or their environment, said 1,4-naphthoquinone being of the formula ##STR1## in which n represent...
05/29/1990
4786652Naphthalene anti-psoriatic agents
Psoriasis in mammals is relieved by topically administering naphthalenes of the formula: ##STR1## wherein: R1 is lower alkoxy or optionally substituted phenoxy, R2 is the same as R1, or R2 is hydrogen, lower alk...
11/22/1988
4735969Menadione choline bisulfite adduct, its preparation and antihemorrhagic compositions
A novel bisulfite adduct of menadione, the menadione choline bisulfite adduct, a process for its preparation, and its use as an antihemorrhagic agent....
04/05/1988
4698184Tellurium imaging composition including improved reductant precursor and method
Imaging films and film-forming compositions are provided which include a reducible tellurium compound, a reductant precursor, a source of labile hydrogen incorporated in a matrix. The reductant precursors are of the formulae ##STR1## where Y
10/06/1987
4657707Process for the preparation of aromatic hydroxy compounds
The invention relates to a process for the preparation of aromatic hydroxy compounds, starting from the corresponding halogenated aromatic compounds and replacing the halogen atom or atoms by the hydroxyl group. The process comprises converting the haloge...
04/14/1987
46280621,4-naphthoquinone derivatives having anti-inflammatory action
New compounds of the formula ##STR1## in which R1 is an allylamino, acetylamino or propionylamino radical, R2 is hydrogen or a 2-methoxyethoxy or ethoxy radical, R3 is hydrogen or a sulphamoyl radical, and R4 is hydr...
12/09/1986
4592867Synthesis method for reductant precursor
A synthesis method is provided for the synthesis of quinone compounds of the formula ##STR1## where n is 0-3, Y1 is alkoxy, Y2 is alkoxy, chloro, bromo or hydrogen and R' and R" each and independently are hydrogen, alkyl or ...
06/03/1986
4593120Naphthalene anti-psoriatic agents
Psoriasis in mammals is relieved by topically administering naphthalenes of the formula: ##STR1## wherein: R1 and R2 are the same and are lower alkoxy, lower alkylthio, optionally substituted phenoxy or optionally substituted ...
06/03/1986
4569943Physiologically active substance P-23924, its production and use
The compound of the formula: ##STR1## wherein R1 is hydrogen, methyl or hydroxymethyl, R2 is hydrogen or methoxy, R3 is hydroxy or methoxy, and R4 is hydrogen or a group ##STR2## is novel, and the...
02/11/1986
4560511Method of producing shikonin
A method of producing shikonin, having the following chemical structure ##STR1## which method comprises dehydrating 2-(1'-acetoxy-4'-hydroxy-4'-methylpentyl)-5,8-diacetoxy-1,4-naphthoquinone , treating the resulting product with an alkali hydroxide an...
12/24/1985
4532078Reductant precursor for tellurium imaging compositions
Imaging films and film-forming compositions are provided which include a reducible tellurium compound, a reductant precursor, a source of labile hydrogen incorporated in a matrix. The reductant precursors are of the formulae ##STR1## where Y
07/30/1985
45308451,4-Napthoquinone derivatives and use thereof
1,4-naphthoquinone derivatives represented by the following general formula: ##STR1## (wherein R1 represents a hydrogen atom, a hydroxy group, a lower alkoxy group or an arylthio group, R2 represents a carboxy group, an est...
07/23/1985
4510321Autoxidative cleavage of ketones in the presence of pulverized alkali metal hydroxide
Processes for the autoxidative cleavage of selected ketones such as C4 -C10 cycloalkanones having at least one hydrogen or at least one R group on a carbon alpha to the carbonyl carbon or aryl alkyl ketones having the formula III ...
04/09/1985
4507241Method for the hydrocarbylation of naphthoquinone derivatives
A method for the hydrocarbylation of naphthoquinones comprising cross-coupling addition of the hydrocarbyl moiety of selected organometallic reagents to leaving group-substituted naphthoquinones....
03/26/1985
4499004Liquid crystal dielectrics, new dyestuffs useful therein, processes for their preparation, and electrooptical display elements based thereon
A new liquid crystal dielectric contains at least one dyestuff of formula I ##STR1## wherein R1 and R2 are identical or different and each is alkyl or alkoxy each of 3 to 8 C atoms or a group Z--Y--, or one of R1 and ...
02/12/1985
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