Class 536/50 - Ethers

Subclass of Class 536 - Organic compounds -- part of the class 532-570 series
Definition: Compounds which have the general formula ROR",
No. of patents: 81
Last issue date: 04/04/2006

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Number	Title	Issue Date
7022836	Methods for producing and transforming cassava protoplasts The invention relates to a method for producing protoplasts of cassava or closely related species, which protoplasts are capable of regeneration into plants. The method comprises producing friable embryogenic callus from explants of cassava or closely related specie...	04/04/2006
6958314	Alkylated alkyl polyglucoside non-ionic surfactants A petro-chemical free nonionic surfactant is prepared by the alkylation of an alkyl polyglucoside (APG). Under suitable alkylation reaction conditions, the surfactants are preferably prepared by the reaction of an APG with either alkyl halide or an alkyl tosylate. T...	10/25/2005
6897028	Identification of molecular targets Identification of the molecular targets of a drug or toxin is the first step in understanding how the drug or toxin works, an important advance in learning how to improve a drug or assess the risks due to a toxin. The primary action of a drug usually involves bindin...	05/24/2005
6872820	Finely divided polysaccharide derivatives Finely divided polysacharide derivatives are described. The finely divided polysacharide derivatives are prepared by a process comprising: a) forming an aqueous composition comprising a polysaccharide derivative and water, in which the polysaccharide derivative is s...	03/29/2005
6600033	Modified cellulose ethers The invention relates to a cellulose ether that is hydrophobically modified with an alkyl or alkenylketene dimer of general formula (I), in which R1 and R2 are alkyl or alkenyl chain, ##STR1## such as one having 5 to 22, preferably 1...	07/29/2003
6528629	Malto-oligosaccharide derived glycosides Disclosed is a method for preparing a malto-oligosaccharide derived glycoside. Generally, the method comprises providing a malto-oligosaccharide and glycosylating the malto-oligosaccharide with an alcohol or a thiol under conditions suitable to form a ...	03/04/2003
6441057	Optical sensor membranes having improved barrier properties The present invention discloses novel polymer compositions comprising cellulose acrylamide, acrylamide and/or a fluorescent indicator species, and membranes made with these compositions. Optical pH sensors for monitoring the pH in a fluid sample, and meth...	08/27/2002
6265570	Cold water soluble starch aldehydes and the method of preparation thereof Stable, cold water soluble, ready for use starch aldehyde compositions and the method of preparation of such compositions wherein an aqueous dispersion of a converted starch acetal is hydrolyzed under acidic conditions to form the starch aldehyde which is...	07/24/2001
6123738	Process for the production of low color 2,3-epoxypropyltrialkylammonium halide 2,3-Epoxypropyltrimethylammonium chloride having reduced color and method of preparation are disclosed. 2,3-Epoxypropyltrimethylammonium chloride is treated with sodium hypochlorite to reduce its color. 2,3-Epoxypropyltrimethylammonium chloride can be pre...	09/26/2000
6121439	Waterborne coatings with cationically modified associative ethers A coating composition is composed of a water-soluble polysaccharide composition comprising at least one hydrophobic group selected from aryl, alkyl, alkenyl, aralkyl and mixtures thereof and at least one quaternary ammonium salt group, both connected to a...	09/19/2000
5883242	Starch for paper making The present invention provides a cationic starch prepared by roasting starch under the presence of a cationic polymer, a method for preparing the cationic starch, and a method for making paper board with the cationic starch. The method for making paper bo...	03/16/1999
5833755	Starch degradation using metal-based coordination complexes A process for the degradation of starch, particularly granular starch, using hydrogen peroxide and a catalytic amount of a metal-based coordination complex in an alkaline slurry reaction....	11/10/1998
5739304	Process for the preparation of water-soluble aminoalkyl derivatives of polysaccharides Water-soluble polysaccharides which contain a) substituents selected from the group consisting of alkyl, hydroxyalkyl, carboxyalkyl and sulfoalkyl, b) N,N-disubstituted aminoalkyl groups, are prepared by alkylation of a polysaccharide in the presence of a base ...	04/14/1998
5708162	Process for the preparation of low molecular weight polysaccharide ethers Process for the preparation of low molecular weight polysaccharide ethers which can be employed in binders for improving adhesive power and film-forming properties, by oxidative degradation of relatively high molecular weight polysaccharide ethers, which ...	01/13/1998
5652360	Cationic starch composition and process for making same Disclosed herein is a new cationic starch and cationic starch paste or slurry. The starch paste or slurry has a low cation equivalent value despite its high nitrogen content and also has a low solution viscosity despite its high molecular weight. The cati...	07/29/1997
5574149	Method of treating HIV infections with 2',3'-dideoxy-3'-fluoro-5-chlorouridine A method for treating HIV infections comprising administering a composition whose active ingredient is 2',3'-dideoxy-3'-fluoro-5'-chlorouridine....	11/12/1996
5473059	Modified hydrophobic cationic thickening compositions Water soluble quaternary ammonium ethers of polysaccharides or polyols wherein the quaternary ammonium ether substituents correspond to the formula ##STR1## wherein R1 is a monohydroxylated or polyhydroxylated alkyl group containing b...	12/05/1995
5455340	Starches modified with amino-multicarboxylates Amino-multicarboxylate starch ether derivatives are provided having the following structure: ##STR1## wherein St-O represents a starch molecule, R is H or CH3 ; R' is H, CH3 or COOH; M is a cation; n is 2 or 3; and R" is H or alkyl o...	10/03/1995
5387675	Modified hydrophobic cationic thickening compositions Water soluble quaternary ammonium ethers of polysaccharides or polyols wherein the quaternary ammonium ether substituents correspond to the formula ##STR1## wherein R1 is a monohydroxylated or polyhydroxylated alkyl group containing b...	02/07/1995
5349089	Reagent for preparing polycationic polysaccharides Cationic polysaccharide derivatives are prepared by reacting a polysaccharide with a polycationic reagent having one polysaccharide reactive group and at least two cationic groups. Suitable reagents include polycationic alkyl, aryl, alkaryl, cycloaliphati...	09/20/1994
5278303	Polymer-supported solution synthesis of oligosaccharides This invention relates to the preparation of oligosaccharides, using polymer supported methodology. By this method, which offers anomeric control, oligosaccharides are produced very rapidly in comparison with known methodologies. Thus, there is disclosed ...	01/11/1994
5241061	Process for the dry cationization of starch A process for dry cationization of starch or a starch-containing material comprises reacting the starch or starch-containing material with a dialkyl(epoxyalkyl)amine or trialkyl(epoxyalkyl) ammonium halide in a medium containing a maximum of 40% by weight...	08/31/1993
5239118	Cyclic conjugated enediynes The synthesis of stable, ten-membered, cyclic conjugated enediynes is described. Said compounds were successfully employed to cleave double-stranded DNA spontaneously at ambient temperatures....	08/24/1993
5227481	Cationic polysaccharides and reagents for their preparation Cationic polysaccharide derivatives are prepared by reacting a polysaccharide with a polycationic reagent having one polysaccharide reactive group and at least two cationic groups. Suitable reagents include polycationic alkyl, aryl, alkaryl, cycloaliphati...	07/13/1993
5192666	଱-amylase assay using modified oligosaccharide and process for producing said modified oligosaccharide ଱-Amylase activity can be determined rapidly and precisely by using as a substrate a modified oligosaccharide wherein a benzyloxymethyl group or a halomethyl group is bonded to the C6 position of non-reducing-end glucose residue and the r...	03/09/1993
5171849	2' and 3' Carboranyl uridines and their diethyl ether adducts There is disclosed a process for preparing carboranyl uridine nucleoside compounds and their diethyl ether adducts, which exhibit a tenfold increase in boron content over prior art boron containing nucleoside compounds. Said carboranyl uridine nucleoside ...	12/15/1992
5116966	Process for separation of sulfated glycosaminoglycans The present invention relates to a process for purifications of natural or synthetic polymers in solution, water-soluble or soluble in water-alcohol medium and comprising sulfate groups, the process consisting essentially, on the one hand, of a selective ...	05/26/1992
5066793	Finely particulate cellulose esters of aromatic or aromatic-aliphatic carboxylic acids, process for their preparation, and the use thereof Finely particulate cellulose esters of aromatic or aromatic-aliphatic carboxylic acids in the form of substantially spherical, partially crystalline particles having an average diameter of 1 to 200 μm and a specific surface area of 10 to 300 m2	11/19/1991
5051500	Method of preparing a randomly-bonded polysaccharide A method of preparing a bulking agent useful in the replacement of carbohydrates and/or fats is provided. The bulking agent is comprised of a randomly-bonded polysacchardie prepared from a granular reducing saccharide and a granular edible polyol by means...	09/24/1991
5011918	Polysaccharides containing aromatic aldehydes and their derivatization via amine-aldehyde interactions A polysaccharide derivative having the structure Sacch--O--Z--Ar--CH.dbd.N--Y or ##STR1## where Sacch--O-- represents a polysaccharide molecule; Z is --(CH2)n -- or ##STR2## Ar is a divalent aromatic group; Y is (a) a ...	04/30/1991
4985410	Quaternary ammonium salts of polysaccharides, prossessing hypocholesterolemic activity Quaternary ammonium salts of polysaccharides possessing hypochlolesterolemic activity and having the following general formula: ##STR1## in which A represents the monomer unit of a natural polysaccharide, m is a whole number between 100 and 1000, n i...	01/15/1991
4973641	Polysaccharide graft copolymers containing reactive aminoethyl halide group A polysaccharide graft copolymer containing a reactive aminoethyl halide group is provided, said copolymer represented by: Sacch--g--(M)a --(T)b where Sacch is a polysaccharide base substrate, M is a repeating unit of the formula: ##...	11/27/1990
4966607	Method of producing dyed polysaccharide:amino or imino starch derivative with reactive dye A method of producing a dyed polysaccharide which comprises linking a dye, capable of linking to amino group or imino group, to a starch derivative having a glucose derivative unit shown in a general formula [I] as a partial structure of the starch deriva...	10/30/1990
4952279	Papermaking method Disclosed are a papermaking method comprising the steps of sheet-formation of an aqueous papermaking stock which contains a cellulose fiber or the said fiber and an inorganic filler, dewatering and drying, charaacterized by the addition of a starch ether ...	08/28/1990
4876336	Amphoteric starches and process for their preparation Improved amphoteric starch derivatives containing tertiary amino or quaternary ammonium groups and anionic phosphate groups are disclosed. The derivatives which are defined by a minimum bound phosphorus content, a minimum viscosity and other criteria have...	10/24/1989
4788280	Polysaccharide derivatives containing aldehyde groups on an aromatic ring, their preparation from the corresponding acetals and use in paper Polysaccharide aldehydes having the formula ##STR1## or Sacch--O--CH2 --Ar--CHO (II) such as starch, cellulose, and gum aldehydes, are useful as paper additives for imparting strength and as the granular or gelatinized portion of a corruga...	11/29/1988
4785087	Process for dry cationization of starch A dry process for preparation of cationic starch ethers by reaction of starch with alkylidene epoxides in the presence of water in an alkaline medium at a temperature of 5° to 40° C. in the presence of a finely divided silica....	11/15/1988
4778880	Process for producing derivatives of hydroxy compounds, the products and their uses A process for producing novel water-soluble compounds of the formula (HO)m --A--(OCH2 NR1 COR)p comprises forming a dispersion of an aqueous solution of a substrate A(OH)n which is an alcohol or, pref...	10/18/1988
4731162	Polysaccharide derivatives containing aldehyde groups for use as paper additives Polysaccharide aldehydes having the general structure ##STR1## such as starch, cellulose and gum aldehydes, are useful for imparting wet, dry, or temporary wet strength to paper. They are prepared by a non-oxidative method which involves reacting the...	03/15/1988
4675394	Polysaccharide derivatives containing aldehyde groups, their preparation from the corresponding acetals and use as paper additives Polysaccharide aldehydes having the general structure ##STR1## such as starch, cellulose and gum aldehydes, are useful for imparting wet, dry, or temporary wet strength to paper. They are prepared by a non-oxidative method which involves reacting the...	06/23/1987

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Class 536/50 - Ethers