Patents by Inventor James N. LePage
James N. LePage 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).
-
Patent number: 10294412Abstract: The present invention includes processes to create wormholes in carbonate reservoirs by contacting a formation with a solution comprising glutamic acid N,N-diacetic acid (GLDA) and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention also includes processes to remove wellbore damage in a carbonate reservoir by contacting a damaged zone of the carbonate reservoir with a solution comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention further includes solutions comprising a salt and further comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof.Type: GrantFiled: August 21, 2015Date of Patent: May 21, 2019Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Cornelia Adriana de Wolf, Hisham Nasr-El-Din, James N. LePage, Mohamed Ahmed Nasr-El-Din Mahmoud, Johanna Hendrika Bemelaar
-
Patent number: 9803134Abstract: An acidic aqueous solution containing a chelating agent and an acid, wherein the chelating agent is glutamic acid N,N-diacetic acid (GLDA) or a salt thereof, and wherein the amount of GLDA or the salt thereof is at least 10 wt %, based on the weight of the aqueous solution, and to the use thereof as an oilfield chemical, in descaling processes, or in processes in which highly concentrated aqueous acids are used, such as cleaning processes or plating processes.Type: GrantFiled: October 10, 2008Date of Patent: October 31, 2017Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Cornelia Adriana De Wolf, James N. Lepage, Johanna Hendrika Bemelaar
-
Patent number: 9587171Abstract: The present invention relates to a process for treating a subterranean formation wherein a fluid containing an ammonium salt of glutamic acid N,N-diacetic acid (GLDA) or methylglycine N,N-diacetic acid (MGDA) is introduced into the formation.Type: GrantFiled: December 14, 2011Date of Patent: March 7, 2017Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Cornelia Adriana De Wolf, James N. Lepage, Hisham Nasr-El-Din, Mohamed Ahmed Nasr-El-Din Mahmoud, Edwin Rudolf Antony Bang, Noble Thekkemelathethil George
-
Patent number: 9556378Abstract: The present invention relates to a chelating agent precursor that contains glutamic acid N,N-diacetic acid (GLDA) and/or methylglycine N,N-diacetic acid (MGDA) wherein at least one of the carboxylic acid groups is present as a carboxylic acid derivative selected from the group of amides, anhydrides, and esters, combinations thereof, and salts thereof, provided that it is not the triethyl ester of GLDA, the triethyl mono-t-butyl ester of GLDA, the tri-t-butyl ester of GLDA, the monobenzyl tri-t-butyl ester of GLDA, any ester or amide that contains azacycloalkane groups, any amide that contains biotin groups, any amide that contains minoethylcarbamoyl based amide groups, (S)-diethyl 2,2?-(1-benzyloxy)-1,5-dioxo-5-(prop-2-ynylamino)pentan-2-ylazanediyl-diacetate, diethyl 2,2?-(5-(3-azidopropylamino)-1-(benzyloxy)-1,5-dioxo-pentan-2-ylazanediyl-diacetate, the trimethyl ester of MGDA, the monomethyl ester dimethylamide of MGDA, the dibenzyl ester of MGDA, the dibenzyl mono t-butyl ester of MGDA, the di t-butyl estType: GrantFiled: February 20, 2012Date of Patent: January 31, 2017Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: James N. Lepage, Cornelia Adriana De Wolf, Johanna Hendrika Bemelaar, Adrianus Maria Reichwein, Axel Carstens, Edwin Rudolf Antony Bang
-
Publication number: 20150361330Abstract: The present invention includes processes to create wormholes in carbonate reservoirs by contacting a formation with a solution comprising glutamic acid N,N-diacetic acid (GLDA) and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention also includes processes to remove wellbore damage in a carbonate reservoir by contacting a damaged zone of the carbonate reservoir with a solution comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention further includes solutions comprising a salt and further comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof.Type: ApplicationFiled: August 21, 2015Publication date: December 17, 2015Applicant: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Cornelia Adriana de Wolf, Hisham Nasr-El-Din, James N. LePage, Mohamed Ahmed Nasr-El-Din Mahmoud, Johanna Hendrika Bemelaar
-
Patent number: 9150780Abstract: The present invention includes processes to create wormholes in carbonate reservoirs by contacting a formation with a solution comprising glutamic acid N,N-diacetic acid (GLDA) and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention also includes processes to remove wellbore damage in a carbonate reservoir by contacting a damaged zone of the carbonate reservoir with a solution comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention further includes solutions comprising a salt and further comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof.Type: GrantFiled: December 15, 2011Date of Patent: October 6, 2015Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Cornelia Adriana de Wolf, Hisham Nasr-El-Din, James N. LePage, Mohamed Ahmed Nasr-El-Din Mahmoud, Johanna Hendrika Bemelaar
-
Publication number: 20130331304Abstract: The present invention relates to a chelating agent precursor that contains glutamic acid N,N-diacetic acid (GLDA) and/or methylglycine N,N-diacetic acid (MGDA) wherein at least one of the carboxylic acid groups is present as a carboxylic acid derivative selected from the group of amides, anhydrides, and esters, combinations thereof, and salts thereof, provided that it is not the triethyl ester of GLDA, the triethyl mono-t-butyl ester of GLDA, the tri-t-butyl ester of GLDA, the monobenzyl tri-t-butyl ester of GLDA, any ester or amide that contains azacycloalkane groups, any amide that contains biotin groups, any amide that contains minoethylcarbamoyl based amide groups, (S)-diethyl 2,2?-(1-benzyloxy)-1,5-dioxo-5-(prop-2-ynylamino)pentan-2-ylazanediyl-diacetate, diethyl 2,2?-(5-(3-azidopropylamino)-1-(benzyloxy)-1,5-dioxo-pentan-2-ylazanediyl-diacetate, the trimethyl ester of MGDA, the monomethyl ester dimethylamide of MGDA, the dibenzyl ester of MGDA, the dibenzyl mono t-butyl ester of MGDA, the di t-butyl estType: ApplicationFiled: February 20, 2012Publication date: December 12, 2013Applicant: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: James N. Lepage, Cornelia Adriana De Wolf, Johanna Hendrika Bemelaar, Adrianus Maria Reichwein, Axel Carstens, Edwin Rudolf Antony Bang
-
Publication number: 20130281329Abstract: The present invention relates to a process for treating a subterranean formation wherein a fluid containing an ammonium salt of glutamic acid N, N-diacetic acid (GLDA) or methylglycine N, N-diacetic acid (MGDA) is introduced into the formation.Type: ApplicationFiled: December 14, 2011Publication date: October 24, 2013Applicant: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Cornelia Adriana De Wolf, James N. Lepage, Hisham Nasr-El-Din, Mohamed Ahmed Nasr-El-Din Mahmoud, Edwin Rudolf Antony Bang, Noble Thekkemelathethil George
-
Publication number: 20130274155Abstract: The present invention relates to a process to control iron in a subterranean formation wherein a fluid containing glutamic acid N,N-diacetic acid or a salt thereof (GLDA) and/or methylglycine N,N-diacetic acid or a salt thereof (MGDA) is introduced into the formation at a temperature between 77 and 400° F. (about 2 and 204° C.). The invention also covers a process of treating a subterranean formation wherein simultaneously iron control takes place.Type: ApplicationFiled: December 14, 2011Publication date: October 17, 2013Applicant: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Hisham Nasr-El-Din, James N. Lepage, Cornelia Adriana De Wolf, Mohamed Ahmed Nasr-El-Din Mahmoud, Ahmed Issam Elsayed Salama Assem
-
Publication number: 20130264060Abstract: The present invention covers a fluid and kit of parts suitable for treating carbonate formations containing glutamic acid N,N-diacetic acid or a salt thereof (GLDA) and/or methylglycine N,N-diacetic acid or a salt thereof (MGDA), a corrosion inhibitor, and a surfactant, and the use thereof.Type: ApplicationFiled: December 16, 2011Publication date: October 10, 2013Applicant: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Cornelia Adriana De Wolf, Hisham Nasr-El-Din, Mohamed Ahmed Nasr-El-Din Mahmoud, James N. Lepage, Johanna Hendrika Bemelaar, Albertus Jacobus Maria Bouwman, Guanqun Wang
-
Publication number: 20130247630Abstract: The present invention relates to a complex of two divalent metal cations and a chelating agent chosen from the group of EDDHA (ethylenediamine-N,N?-di-(hydroxyphenyl acetic acid)), EDDHMA (ethylenediamine-N,N?-di-(hydroxy-methylphenyl acetic acid)), and HBED(N,N?-bis(hydroxybenzyl)ethylenediamine-N,N?-diacetic acid), a process to prepare such complex, plant nutrition compositions containing such complex and the use thereof as an algaecide, a bactericide, a herbicide, an insecticide, a molluscicide, a virucide or a fungicide, other than a fungicide or bactericide used for personal care.Type: ApplicationFiled: October 28, 2011Publication date: September 26, 2013Applicant: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Adrianus Maria Reichwein, James N. Lepage, Teunis Scheperman
-
Publication number: 20120202720Abstract: The present invention includes processes to create wormholes in carbonate reservoirs by contacting a formation with a solution comprising glutamic acid N,N-diacetic acid (GLDA) and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention also includes processes to remove wellbore damage in a carbonate reservoir by contacting a damaged zone of the carbonate reservoir with a solution comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention further includes solutions comprising a salt and further comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof.Type: ApplicationFiled: December 15, 2011Publication date: August 9, 2012Applicant: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Cornelia Adriana de Wolf, Hisham Nasr-El-Din, James N. LePage, Mohamed Ahmed Nasr-El-Din Mahmoud, Johanna Hendrika Bemelaar
-
Publication number: 20100276152Abstract: The present invention relates to an acidic aqueous solution containing a chelating agent and an acid, wherein the chelating agent is glutamic acid N,N-diacetic acid (GLDA) or a salt thereof and wherein the amount of GLDA or the salt thereof is at least 10 wt %, based on the weight of the aqueous solution, and to the use thereof as an oilfield chemical, in descaling processes, or in processes in which highly concentrated aqueous acids are used, such as cleaning processes or plating processes.Type: ApplicationFiled: October 10, 2008Publication date: November 4, 2010Applicant: Akzo Nobel N.V.Inventors: Cornelia Adriana De Wolf, James N. Lepage, Johanna Hendrika Bemelaar
-
Patent number: 4359323Abstract: This application discloses a liquid chromatography system which can be operated in a batch or a continuous mode. The system consists of the chromatographic column, a reaction column wherein the substances previously separated are reacted to form a readily detected compound and a loop to recycle the mobile phase for reuse. A prime feature of this system is having the mobile phase contain a reactant which upon reaction with an unknown produces a readily detectable compound. This system is very suitable for plant quality control operations and is of considerable value in analyzing compounds having primary amine functionality.Type: GrantFiled: October 31, 1980Date of Patent: November 16, 1982Assignee: W. R. Grace & Co.Inventor: James N. LePage