Patents by Inventor Roger R. Gaudette
Roger R. Gaudette has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5710295Abstract: A process of preparing alkali metal N-acyl amino acids, especially sodium N-acyl sarcosinates. The process of the invention eliminates the use of phosphorus trichloride or thionyl chloride and carboxylic acid chlorides. The process involves reacting the alkali metal N-acyl amino acid directly with a fatty acid at elevated temperatures with constant removal of water generated in the reaction.Type: GrantFiled: June 6, 1995Date of Patent: January 20, 1998Assignee: Hampshire Chemical Corp.Inventors: Richard P. Woodbury, Roger R. Gaudette, F. David Wood
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Patent number: 5449822Abstract: Synthesis of ethylenediaminetriacetic acid (ED3A) or its salts is disclosed. A salt of N,N'-ethylenediaminediacetic acid (ED2AH.sub.2) is condensed with formaldehyde to form a stable 5-membered ring intermediate. The addition of cyanide across this cyclic material forms ethylenediamine N,N'-diacetic acid-N'-cyanomethyl or salts thereof (mononitrile-diacid). The nitrile in aqueous solutions may be spontaneously cyclized to form 2-oxo-1,4-piperazinediacetic acid (3KP) or salts thereof, which is the desired cyclic intermediate. In the presence of excess base, salts of ED3A are formed in excellent yield and purity. Alternatively, the starting material is ED2AH.sub.a X.sub.b, where x is a base cation, e.g., an alkali or alkaline earth metal, a is 1 to 2, and b is 0 to 1 in aqueous solutions. The reaction mixture also can be acidified to ensure complete formation of carboxymethyl-2-oxopiperazine (the lactam) prior to the reaction. Formaldehyde is added, essentially resulting in the hydroxymethyl derivative.Type: GrantFiled: May 7, 1993Date of Patent: September 12, 1995Assignee: Hampshire Chemical Corp.Inventors: Brian A. Parker, Barry A. Cullen, Roger R. Gaudette
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Patent number: 5250728Abstract: Synthesis of ethylenediaminetriacetic acid (ED3A) or its salts is disclosed. A salt of N,N'-ethylenediaminediacetic acid (ED2AH.sub.2) is condensed with formaldehyde to form a stable 5-membered ring intermediate. The addition of cyanide across this cyclic material forms ethylenediamine N,N'-diacetic acid-N'-cyanomethyl or salts thereof (mononitrile-diacid). The nitrile in aqueous solutions may be spontaneously cyclized to form 2-oxo-1,4-piperazinediacetic acid (3KP) or salts thereof, which is the desired cyclic intermediate. In the presence of excess base, salts of ED3A are formed in excellent yield and purity. Alternatively, the starting material is ED2AH.sub.a X.sub.b, where x is a base cation, e.g., an alkali or alkaline earth metal, a is 1 to 2, and b is 0 to 1 in aqueous solutions. The reaction mixture also can be acidified to ensure complete formation of carboxymethyl-2-oxopiperazine (the lactam) prior to the reaction. Formaldehyde is added, essentially resulting in the hydroxymethyl derivative.Type: GrantFiled: December 12, 1991Date of Patent: October 5, 1993Assignee: Hampshire Chemical Corp.Inventors: Brian A. Parker, Barry A. Cullen, Roger R. Gaudette
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Patent number: 5167866Abstract: This invention relates to controlling corrosion in aqueous systems and more particularly to using certain calcium insensitive phosphonomethyl amine oxide compounds. The compounds of this invention are water soluble phosphonomethyl amine oxides having at least one oxidized tertiary amine group of the formula: ##STR1## and water soluble salts thereof and having a cloud point of at least about 25 ppm.Type: GrantFiled: December 15, 1989Date of Patent: December 1, 1992Assignee: W. R. Grace & Co. Conn.Inventors: Chih M. Hwa, John A. Kelly, Janet Neton, Patricia M. Scanlon, Roger R. Gaudette
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Patent number: 5096595Abstract: This invention relates to controlling scale formation in aqueous systems and more particularly to using certain calcium insensitive phosphonomethyl amine oxide compounds having at least one oxidized tertiary amine group of the formula: ##STR1## and water soluble salts thereof.Type: GrantFiled: February 11, 1991Date of Patent: March 17, 1992Assignee: W. R. Grace & Co.-Conn.Inventors: Chih M. Hwa, John A. Kelly, Janet Neton, Patricia M. Scanlon, Roger R. Gaudette
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Patent number: 5069798Abstract: This invention relates to certain calcium insensitive phosphonomethyl amine compounds and their use as scale control agents for treating aqueous systems. The compounds of this invention are water-soluble phosphonomethyl amine compounds having the formula: ##STR1## and water soluble salts thereof selected from the group consisting of N-phosphonomethyl iminodiacetic acid, N,N-bis-phosphonomethyl- 2-(hydroxyethoxy)ethylamine, 4-(phosphonomethyl)-2-hydroxy-2-oxo-1,4,2-oxazaphosphorinane, N,N-bis-phosphonomethyl taurine and N,N-bis-phosphonomethyl ethylamine; and having a cloud point of at least about 25 ppm as determined by the CA500 cloud point test or a water soluble salt of said phosphonomethyl amine.Type: GrantFiled: December 15, 1989Date of Patent: December 3, 1991Assignee: W. R. Grace & Co.-Conn.Inventors: Chih M. Hwa, John A. Kelly, Janet Neton, Patricia M. Scanlon, Roger R. Gaudette
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Patent number: 5051532Abstract: This invention relates to novel organic phosphonate compounds which can be used as water treatment agents. More specifically, this invention relates to the compound N,N-bis-phosphonomethyl taurine N-oxide which may be represented by the formula: ##STR1## and its water soluble salts, which can be employed for the control of scale and/or corrosion.Type: GrantFiled: December 15, 1989Date of Patent: September 24, 1991Assignee: W. R. Grace & Co.-Conn.Inventors: Chih M. Hwa, John A. Kelly, Janet Neton, Patricia M. Scanlon, Roger R. Gaudette
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Patent number: 5019343Abstract: This invention relates to a method for preventing corrosion and inhibiting the formation of scale deposition in aqueous systems. More specifically, it relates to using certain calcium insensitive phosphonomethyl amine compounds having the formula: ##STR1## wherein either R.sub.1 is selected from hydrogen, hydrocarbyl, hydroxy-substituted hydrocarbyl, alkoxy-substituted hydrocarbyl; and R.sub.2 is selected from hydrocarbyl, hydroxy-substituted hydrocarbyl, alkoxy-substituted hydrocarbyl, carboxyl-substituted hydrocarbyl, --CH.sub.2 PO.sub.3 H.sub.2, and --C.sub.2 H.sub.4 N(CH.sub.2 PO.sub.3 H.sub.2).sub.2 ; or R.sub.1 and R.sub.2 together form an alicyclic ring having 3 to 5 carbon atoms, optionally along with oxygen atoms, phosphorus atoms or both oxygen and phosphorus atoms in the ring, and water soluble salts thereof.Type: GrantFiled: December 15, 1989Date of Patent: May 28, 1991Assignee: W. R. Grace & Co.-Conn.Inventors: Chih M. Hwa, John A. Kelly, Janet Neton, Patricia M. Scanlon, Roger R. Gaudette
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Patent number: 4871552Abstract: Substituted hydantoin analogues of essential amino acids are used as nutritive supplements in animal feed compositions.Type: GrantFiled: March 29, 1988Date of Patent: October 3, 1989Assignee: W. R. Grace & Co.-Conn.Inventors: Robert W. Bragdon, Roger R. Gaudette
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Patent number: 4744990Abstract: Substituted hydantoin analogues of essential amino acids are used as nutritive supplements in animal feed compositions.Type: GrantFiled: September 25, 1986Date of Patent: May 17, 1988Assignee: W. R. Grace & Co.Inventors: Robert W. Bragdon, Roger R. Gaudette
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Patent number: 4338460Abstract: A process for preparing in high yield an isolable orthohydroxydiaminodicarboxylic acid which is useful as a metal chelating agent. The process comprises reacting a phenol (or mixture of phenols), a diaminodicarboxylic acid (or acid source), and a formaldehyde source in a medium having an acidic pH.Type: GrantFiled: August 20, 1980Date of Patent: July 6, 1982Assignee: W. R. Grace & Co.Inventors: Roger R. Gaudette, John L. Ohlson, Patricia M. Scanlon
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Patent number: 4225502Abstract: A novel chelating agent having the formula ##STR1## (a) each of X.sub.1, X.sub.2, X.sub.3, and X.sub.4 is a member selected from the group consisting of (i) hydrogen; (ii) an alkyl group having 1-4 carbon atoms; (iii) --CN; (iv) --SO.sub.3 M.sub.1 ; (v) --COOM.sub.1 ; (vi) --OM.sub.3 ; (vii) --NO.sub.2 ; (viii) --OH; and ##STR2## in which each of R.sub.1 and R.sub.2 is an alkyl group having 1-4 carbon atoms;(b) each of M.sub.1, M.sub.2, M.sub.3, and M.sub.4 is a member selected from the group consisting of (i) a hydrogen ion; (ii) an alkali metal ion; (iii) 1/2 an alkaline earth metal ion; and (vi) an ammonium ion having the formula ##STR3## in which each of R.sub.3, R.sub.4, R.sub.5, and R.sub.6 is a member selected from the group consisting of (A) hydrogen; (B) an alkyl group having 1-4 carbon atoms; and (C) a hydroxyalkyl group having 1-4 carbon atoms; and(c) Z is a member selected from the group consisting of (i) hydrogen; and (ii) hydroxyl.Type: GrantFiled: February 7, 1977Date of Patent: September 30, 1980Assignee: W. R. Grace & Co.Inventors: Roger R. Gaudette, John L. Ohlson, Patricia M. Scanlon
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Patent number: 4175198Abstract: A 5-Secondary alkylidene hydantoin having the formula ##STR1## in which: (a) R is an alkyl group having 1-2 carbon atoms; and (b) X is hydrogen or a phenyl group can be prepared by condensing a hydantoin having the formula ##STR2## and a ketone having the formula ##STR3## in the presence of ammonia or an amine catalyst, the amine being a primary amine having a pK.sub.b between about 3 and about 5.Type: GrantFiled: November 17, 1977Date of Patent: November 20, 1979Assignee: W. R. Grace & Co.Inventor: Roger R. Gaudette
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Patent number: 4152345Abstract: An iron, copper, cobalt, manganese, chromium, nickel, zinc, cadmium, molybdenum, or lead chelate of a novel chelating agent having the formula ##STR1## in which (A) EACH OF X.sub.1, X.sub.2, X.sub.3, and X.sub.4 is a member selected from the group consisting of (i) hydrogen; (ii) an alkyl group having 1-4 carbon atoms; (iii) --CN; (iv) --SO.sub.3 M.sub.1 ; (v) --COOM.sub.1 ; (vi) --OM.sub.3 ; (vii) --NO.sub.2 ; (viii) --OH; and ##STR2## IN WHICH EACH OF R.sub.1 and R.sub.2 is an alkyl group having 1-4 carbon atoms;(b) each of M.sub.1, M.sub.2, M.sub.3, and M.sub.4 is a member selected from the group consisting of (i) a hydrogen ion; (ii) an alkali metal ion; (iii) 1/2 an alkaline earth metal ion; and (vi) an ammonium ion having the formula ##STR3## in which each of R.sub.3, R.sub.4, R.sub.5, and R.sub.Type: GrantFiled: March 10, 1978Date of Patent: May 1, 1979Assignee: W. R. Grace & Co.Inventors: Roger R. Gaudette, John L. Ohlson, Patricia M. Scanlon