US5980774A — Environmentally benign anti-icing or deicing agent

Claim 1

Independent Claim 68 words

A method of preparing a substantially benign deicing composition, said method comprising: (a) recovering an industrial stream comprising a water soluble hydroxycarboxylic acid; and (b) adding an effective amount of a freezing point lowering compound to said industrial stream to lower the freezing point of said industrial stream, said freezing point lowering compound selected from the group consisting of water soluble hydroxycarboxylic acid esters, glycosides and mixtures thereof.

Claim 2

Independent Claim 68 words

A method of preparing a substantially benign deicing composition, said method comprising: (a) recovering an industrial stream comprising a water soluble hydroxycarboxylic acid; and (b) adding an effective amount of a freezing point lowering compound to said industrial stream to lower the freezing point of said industrial stream, said freezing point lowering compound selected from the group consisting of water soluble hydroxycarboxylic acid esters, glycosides and mixtures thereof.

Claim 3

Independent Claim 38 words

A method for deicing and/or anti-icing a surface, said method comprising: applying to said surface a composition comprising: (a) a deicing and/or anti-icing agent comprising at least about 90 weight percent of a hydrocarbyl aldoside; and (b) water.

Claim 4

Independent Claim 38 words

A method for deicing and/or anti-icing a surface, said method comprising: applying to said surface a composition comprising: (a) a deicing and/or anti-icing agent comprising at least about 90 weight percent of a hydrocarbyl aldoside; and (b) water.

Claim 5

Dependent Claim 15 words

A method as defined in claim 2 wherein said hydrocarbyl aldoside comprises an alkyl aldoside.

Claim 6

Dependent Claim 26 words

A method as defined in claim 2 wherein said hydrocarbyl aldoside is selected from the group consisting of glucosides, furanosides, maltosides, maltotriosides, glucopyranosides and mixtures thereof.

Claim 7

Dependent Claim 14 words

A method as defined in claim 3 wherein said alkyl aldoside comprises methyl glucoside.

Claim 8

Dependent Claim 15 words

A method as defined in claim 2 wherein said deicing and/or anti-icing agent comprises sorbitol.

Claim 9

Dependent Claim 58 words

A method as defined in claim 2 wherein said deicing and/or anti-icing agent further comprises a freezing point lowering additive selected from the group consisting of hydroxycarboxylic acid salts, acetate salts, formate salts, citrate salts, amino acids and salts of amino acids, dicarboxylic acid salts, lignin components, boric acid and salts of boric acid, glycerol, and mixtures thereof.

Claim 10

Dependent Claim 59 words

A method as defined in claim 7 wherein said freezing point lowering additive is selected from the group consisting of sodium lactate, cesium acetate, sodium acetate, potassium acetate, sodium formate, sodium citrate, lysine glutamate, sodium glucoheptonate, sodium and potassium salts of adipic, glutaric, succinic and malonic acids, boric acid, sodium borate, lignin sulfonate, sodium pyrrolidone carboxylate and mixtures thereof.

Claim 11

Dependent Claim 17 words

A method as defined in claim 8 wherein said freezing point lowering additive comprises sodium pyrrolidone carboxylate.

Claim 12

Dependent Claim 13 words

A method as defined in claim 2 wherein said surface comprises an aircraft.

Claim 13

Independent Claim 92 words

A method of deicing and/or anti-icing a surface, said method comprising: applying to said surface a composition consisting essentially of: (a) an effective freezing point lowering amount of a deicing and/or anti-icing agent consisting essentially of a hydrocarbyl aldoside, and (b) water, and, optionally, (c) a freezing point lowering additive selected from the group consisting of hydroxycarboxylic acid salts, acetate salts, formate salts, citrate salts, amino acids and salts of amino acids, dicarboxylic acid salts, lignin compounds, boric acid and salts of boric acid, ethylene glycol, propylene glycol, glycerol and mixtures thereof.

Claim 14

Independent Claim 92 words

A method of deicing and/or anti-icing a surface, said method comprising: applying to said surface a composition consisting essentially of: (a) an effective freezing point lowering amount of a deicing and/or anti-icing agent consisting essentially of a hydrocarbyl aldoside, and (b) water, and, optionally, (c) a freezing point lowering additive selected from the group consisting of hydroxycarboxylic acid salts, acetate salts, formate salts, citrate salts, amino acids and salts of amino acids, dicarboxylic acid salts, lignin compounds, boric acid and salts of boric acid, ethylene glycol, propylene glycol, glycerol and mixtures thereof.

Claim 15

Dependent Claim 26 words

A method as defined in claim 11 wherein said hydrocarbyl aldoside is selected from the group consisting of glucosides, furanosides, maltosides, maltotriosides, glucopyranosides and mixtures thereof.

Claim 16

Dependent Claim 14 words

A method as defined in claim 11 wherein said hydrocarbyl aldoside comprises methyl glucoside.

Claim 17

Dependent Claim 13 words

A method as defined in claim 11 wherein said hydrocarbyl aldoside comprises sorbitol.

Claim 18

Dependent Claim 59 words

A method as defined in claim 11 wherein said freezing point lowering additive is selected from the group consisting of sodium lactate, cesium acetate, sodium acetate, potassium acetate, sodium formate, sodium citrate, lysine glutamate, sodium glucoheptonate, sodium and potassium salts of adipic, glutaric, succinic and malonic acids, boric acid, sodium borate, lignin sulfonate, sodium pyrrolidone carboxylate, and mixtures thereof.

Claim 19

Dependent Claim 17 words

A method as defined in claim 15 wherein said freezing point lowering additive comprises sodium pyrrolidone carboxylate.

Claim 20

Dependent Claim 33 words

A method as defined in claim 15 wherein said surface is an aircraft and said freezing point lowering additive is selected from the group consisting of ethylene glycol, propylene glycol and mixtures thereof.

Claim 21

Dependent Claim 76 words

A deicing and/or anti-icing agent consisting essentially of: (a) an effective freezing point lowering amount of a mixture of a hydroxycarboxylic acid salt and a hydrocarbyl aldoside, (b) water, and, optionally, (c) a freezing point lowering additive selected from the group consisting of acetate salts, formate salts, citrate salts, amino acids and salts of amino acids, dicarboxylic acid salts, lignin compounds, boric acid and salts or boric acid, ethylene glycol, propylene glycol, glycerol and mixtures thereof.

Claim 22

Dependent Claim 76 words

A deicing and/or anti-icing agent consisting essentially of: (a) an effective freezing point lowering amount of a mixture of a hydroxycarboxylic acid salt and a hydrocarbyl aldoside, (b) water, and, optionally, (c) a freezing point lowering additive selected from the group consisting of acetate salts, formate salts, citrate salts, amino acids and salts of amino acids, dicarboxylic acid salts, lignin compounds, boric acid and salts or boric acid, ethylene glycol, propylene glycol, glycerol and mixtures thereof.

Claim 23

Dependent Claim 15 words

A composition as defined in claim 18 wherein said hydroxycarboxylic acid salt comprises sodium lactate.

Claim 24

Dependent Claim 15 words

A composition as defined in claim 18 wherein said hydrocarbyl aldoside comprises an alkyl aldoside.

Claim 25

Dependent Claim 13 words

A composition as defined in claim 18 wherein said hydrocarbyl aldoside comprises sorbitol.

Claim 26

Dependent Claim 26 words

A composition as defined in claim 18 wherein said hydrocarbyl aldoside is selected from the group consisting of glucosides, furanosides, maltosides, maltotriosides, glucopyranosides and mixtures thereof.

Claim 27

Dependent Claim 14 words

A composition as defined in claim 20 wherein said alkyl aldoside comprises methyl glucoside.

Claim 28

Dependent Claim 57 words

A composition as defined in claim 18 wherein said freezing point lowering additive is selected from the group consisting of cesium acetate, sodium acetate, potassium acetate, sodium formate, sodium citrate, lysine glutamate, sodium glucoheptonate, sodium and potassium salts of adipic, glutaric, succinic and malonic acids, boric acid, sodium borate, lignin sulfonate, sodium pyrrolidone carboxylate, and mixtures thereof.

Claim 29

Dependent Claim 27 words

A composition as defined in claim 18 wherein said freezing point lowering additive is selected from the group consisting of ethylene glycol, propylene glycol and mixtures thereof.

Claim 30

Dependent Claim 29 words

A de-icing and/or anti-icing agent composition comprising: (a) an effective freezing point lowering amount of a mixture of a hydrocarbyl aldoside and a hydroxycarboxylic acid ester, and, (b) water.

Claim 31

Dependent Claim 29 words

A de-icing and/or anti-icing agent composition comprising: (a) an effective freezing point lowering amount of a mixture of a hydrocarbyl aldoside and a hydroxycarboxylic acid ester, and, (b) water.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2002-11-08	2003-05-10	2003-11-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2006-11-08	2007-05-10	2007-11-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2010-11-08	2011-05-10	2011-11-09	$7700.00	Window Closed / Lapsed

Environmentally benign anti-icing or deicing agent

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