Patents by Inventor Laurence Waino McKeen
Laurence Waino McKeen 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: 9416292Abstract: A coating composition is provided comprising (a) an aqueous medium, (b) melt-fabricable perfluoropolymer dispersed in said aqueous medium and having a melting temperature of at least 290° C., (c) melt-fabricable perfluoropolymer dispersed in said aqueous medium and having a melting temperature of no greater than 270° C., and (d) water miscible organic liquid having a boiling temperature of at least 280° C. and optionally (e) filler, the combination of (c) and (d) providing sloughing resistance to said composition applied to a non-horizontal substrate and baked, component (d) being unnecessary when component (a) is not present in the coating composition, and when filler is present the amount of (c) being present in an effective amount to increase the cohesive strength of the baked layer of the coating composition.Type: GrantFiled: October 7, 2014Date of Patent: August 16, 2016Assignee: THE CHEMOURS COMPANY FC, LLCInventors: Laurence Waino McKeen, Ying Wang
-
Publication number: 20150024193Abstract: A coating composition is provided comprising (a) an aqueous medium, (b) melt-fabricable perfluoropolymer dispersed in said aqueous medium and having a melting temperature of at least 290° C., (c) melt-fabricable perfluoropolymer dispersed in said aqueous medium and having a melting temperature of no greater than 270° C., and (d) water miscible organic liquid having a boiling temperature of at least 280° C. and optionally (e) filler, the combination of (c) and (d) providing sloughing resistance to said composition applied to a non-horizontal substrate and baked, component (d) being unnecessary when component (a) is not present in the coating composition, and when filler is present the amount of (c) being present in an effective amount to increase the cohesive strength of the baked layer of the coating composition.Type: ApplicationFiled: October 7, 2014Publication date: January 22, 2015Inventors: LAURENCE WAINO MCKEEN, YING WANG
-
Patent number: 8889779Abstract: A coating composition is provided comprising (a) an aqueous medium, (b) melt-fabricable perfluoropolymer dispersed in said aqueous medium and having a melting temperature of at least 290° C., (c) melt-fabricable perfluoropolymer dispersed in said aqueous medium and having a melting temperature of no greater than 270° C., and (d) water miscible organic liquid having a boiling temperature of at least 280° C. and optionally (e) filler, the combination of (c) and (d) providing sloughing resistance to said composition applied to a non-horizontal substrate and baked, component (d) being unnecessary when component (a) is not present in the coating composition, and when filler is present the amount of (c) being present in an effective amount to increase the cohesive strength of the baked layer of the coating composition.Type: GrantFiled: April 19, 2011Date of Patent: November 18, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Laurence Waino McKeen, Ying Wang
-
Patent number: 8776837Abstract: The present invention relates to an oil pipe having a lining imparting substantially reduced adhesion of asphaltenes, paraffin wax, and inorganic scale, so as to reduce plugging of said oil pipe, and impermeability to salt water so as to protect the oil pipe from corrosion.Type: GrantFiled: February 21, 2013Date of Patent: July 15, 2014Assignee: E I du Pont de Nemours and CompanyInventor: Laurence Waino McKeen
-
Patent number: 8685493Abstract: The present invention relates to a vessel, in particular a pipe, especially an oil pipe, having a preformed film adhered onto the interior surface of the pipe, the interior surface of the preformed film reducing the deposition of at least one of asphaltenes, paraffin wax, and inorganic scale by at least 40% as compared to the interior surface of said oil pipe without said preformed film being present. In a preferred embodiment, the preformed film is adhered to the interior surface of the pipe with a primer layer with an optional barrier layer between the primer layer and the preformed film.Type: GrantFiled: June 1, 2012Date of Patent: April 1, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Laurence Waino McKeen, Kimberly Dawn Farnsworth, W. Douglas Obal, Pidatala K. Mohan
-
Patent number: 8616283Abstract: A process for treating a water stream produced in the recovery of heavy oil from geological formations. The process includes use of a heat exchange unit having at least one tube having a multi-layer coating. The multi-layer coating includes a melt flowable copolymer of tetrafluoroethylene adhered to the interior surface or exterior surface of the tube.Type: GrantFiled: November 18, 2010Date of Patent: December 31, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Laurence Waino McKeen, Michael Albert Hooper
-
Patent number: 8616245Abstract: Pipe useful for downhole and transport of hydrocarbon fuel such as oil and/or natural gas is provided that has a non-stick coating adhered to the pipe interior surface, said coating being at least about 50 ?m thick and comprising at least two layers constituting an inner layer and an outer layer adhered to one another, each said layers containing polymer binder and fluoropolymer and being at least about 15 ?m thick, the weight proportion of said polymer binder to said fluoropolymer in said inner layer and in said outer layer but being effective to maintain adhesion between said layers during pressurization and decompression upon said non-stick coating being exposed to the Autoclave Test and the proportion of said fluoropolymer in said inner layer and said outer layer being effective to protect said interior surface during exposure of said non-stick coating to the Acid Soak Test.Type: GrantFiled: August 29, 2008Date of Patent: December 31, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Richard C. Albert, Craig King Hennessey, Laurence Waino McKeen, Jurgen F. A. Hofmans, Raf Moens
-
Patent number: 8453740Abstract: Disclosed is a process for reducing the deposition of asphaltenes, paraffin wax, or inorganic scale in an oil well pipe by providing a system of pipes that convey any flowable medium, such as oil and gas. More particularly the system of pipes is provided with different coatings or linings for the interior and exterior surfaces of such pipes, depending on the environment in which the pipes are used. The pipes may be coated with different materials, which may be of different thicknesses, with various configurations of coatings or linings. Such coating may be on the interior and/or exterior of the pipes.Type: GrantFiled: November 4, 2010Date of Patent: June 4, 2013Assignee: E.I. du Pont de Nemours and CompanyInventors: Pidatala K. Mohan, Steven A. Mestemacher, Kimberly Dawn Farnsworth, Laurence Waino McKeen, W. Douglas Obal
-
Patent number: 8383199Abstract: The present invention relates to a process for adhering a lining to the interior surface of an oil pipe wherein the lining imparts substantially reduced adhesion of asphaltenes, paraffin wax, and inorganic scale, so as to reduce plugging of the oil pipe, and impermeability to salt water so as to protect the oil pipe from corrosion.Type: GrantFiled: July 9, 2009Date of Patent: February 26, 2013Assignee: E. I. duPont de Nemours and CompanyInventor: Laurence Waino McKeen
-
Publication number: 20120241086Abstract: The present invention relates to a vessel, in particular a pipe, especially an oil pipe, having a preformed film adhered onto the interior surface of the pipe, the interior surface of the preformed film reducing the deposition of at least one of asphaltenes, paraffin wax, and inorganic scale by at least 40% as compared to the interior surface of said oil pipe without said preformed film being present. In a preferred embodiment, the preformed film is adhered to the interior surface of the pipe with a primer layer with an optional barrier layer between the primer layer and the preformed film.Type: ApplicationFiled: June 1, 2012Publication date: September 27, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: LAURENCE WAINO MCKEEN, Kimberly Dawn Farnsworth, W. Douglas Obal, Pidatala K. Mohan
-
Patent number: 8211497Abstract: The present invention relates to a vessel, in particular a pipe, especially an oil pipe, having a preformed film adhered onto the interior surface of the pipe, the interior surface of the preformed film reducing the deposition of at least one of asphaltenes, paraffin wax, and inorganic scale by at least 40% as compared to the interior surface of said oil pipe without said preformed film being present. In a preferred embodiment, the preformed film is adhered to the interior surface of the pipe with a primer layer with an optional barrier layer between the primer layer and the preformed film.Type: GrantFiled: October 27, 2009Date of Patent: July 3, 2012Assignee: E. I. du Pont de Nemours and CompanyInventors: Laurence Waino McKeen, Kimberly Dawn Farnsworth, W. Douglas Obal, Pidatala K. Mohan
-
Publication number: 20110293920Abstract: A coating composition is provided comprising (a) an aqueous medium, (b) melt-fabricable perfluoropolymer dispersed in said aqueous medium and having a melting temperature of at least 290° C., (c) melt-fabricable perfluoropolymer dispersed in said aqueous medium and having a melting temperature of no greater than 270° C., and (d) water miscible organic liquid having a boiling temperature of at least 280° C. and optionally (e) filler, the combination of (c) and (d) providing sloughing resistance to said composition applied to a non-horizontal substrate and baked, component (d) being unnecessary when component (a) is not present in the coating composition, and when filler is present the amount of (c) being present in an effective amount to increase the cohesive strength of the baked layer of the coating composition.Type: ApplicationFiled: April 19, 2011Publication date: December 1, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: LAURENCE WAINO MCKEEN, YING WANG
-
Publication number: 20110139451Abstract: The invention relates to a process for treating a water stream produced in the recovery of heavy oil from geological formations comprising.Type: ApplicationFiled: November 18, 2010Publication date: June 16, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Laurence Waino McKeen, Michael Albert Hooper
-
Publication number: 20110041924Abstract: The present invention relates to the process of a system of pipes that convey any flowable medium, such as chemicals, food and in particular, oil and gas, and more particularly to a system of pipes having different coatings or linings for the interior and exterior surfaces of such pipes, depending on the environment in which the pipes are used. The pipes may be coated with different materials, which may be of different thicknesses, with various configurations of coatings or linings. Such coating may be done on the interior and/or the exterior of the pipes.Type: ApplicationFiled: November 4, 2010Publication date: February 24, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Pidatala K. Mohan, Steven A. Mestemacher, Kimberly Dawn Farnsworth, Laurence Waino McKeen, W. Douglas Obal
-
Patent number: 7870877Abstract: The present invention relates to a pipe, especially an oil pipe, having a lining comprising a fluoropolymer adhered to its interior surface and a lining formed on its exterior surface. The interior and/or exterior lining may comprise a primer layer comprising a fluoropolymer, and preferably a perfluoropolymer and an overcoat or a preformed film adhered to the primer layer. Either the overcoat or the preformed liner also comprises a fluoropolymer, and preferably a perfluoropolymer. The surface of the lining facing the flowable media, such as oil, may be a pure perfluoropolymer to provide a particularly good non-stick surface for the oil.Type: GrantFiled: May 26, 2009Date of Patent: January 18, 2011Assignee: E.I. du Pont de Nemours and CompanyInventors: Laurence Waino McKeen, Pidatala K. Mohan, Steven A. Mestemacher, Kimberly Dawn Farnsworth, W. Douglas Obal
-
Patent number: 7871684Abstract: The present invention relates to an oil pipe having a lining imparting substantially reduced adhesion of asphaltenes, paraffin wax, and inorganic scale, so as to reduce plugging of said oil pipe, and impermeability to salt water so as to protect the oil pipe from corrosion.Type: GrantFiled: July 9, 2009Date of Patent: January 18, 2011Assignee: E. I. du Pont de Nemours and CompanyInventor: Laurence Waino McKeen
-
Publication number: 20100043905Abstract: The present invention relates to a vessel, in particular a pipe, especially an oil pipe, having a preformed film adhered onto the interior surface of the pipe, the interior surface of the preformed film reducing the deposition of at least one of asphaltenes, paraffin wax, and inorganic scale by at least 40% as compared to the interior surface of said oil pipe without said preformed film being present. In a preferred embodiment, the preformed film is adhered to the interior surface of the pipe with a primer layer with an optional barrier layer between the primer layer and the preformed film.Type: ApplicationFiled: October 27, 2009Publication date: February 25, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Laurence Waino McKeen, Kimberly Dawn Farnsworth, W. Douglas Obal, Pidatala K. Mohan
-
Publication number: 20100043885Abstract: The present invention relates to a vessel, in particular a pipe, especially an oil pipe, having a preformed film adhered onto the interior surface of the pipe, the interior surface of the preformed film reducing the deposition of at least one of asphaltenes, paraffin wax, and inorganic scale by at least 40% as compared to the interior surface of said oil pipe without said preformed film being present. In a preferred embodiment, the preformed film is adhered to the interior surface of the pipe with a primer layer with an optional barrier layer between the primer layer and the preformed film.Type: ApplicationFiled: October 27, 2009Publication date: February 25, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Laurence Waino McKeen, Kimberly Dawn Farnsworth, W. Douglas Obal, Pidatala K. Mohan
-
Publication number: 20090272479Abstract: The present invention relates to an oil pipe having a lining imparting substantially reduced adhesion of asphaltenes, paraffin wax, and inorganic scale, so as to reduce plugging of said oil pipe, and impermeability to salt water so as to protect the oil pipe from corrosion.Type: ApplicationFiled: July 9, 2009Publication date: November 5, 2009Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventor: Laurence Waino McKeen
-
Publication number: 20090265913Abstract: The present invention relates to a pipe, especially an oil pipe, having a lining comprising a fluoropolymer adhered to its interior surface and a lining formed on its exterior surface. The interior and/or exterior lining may comprise a primer layer comprising a fluoropolymer, and preferably a perfluoropolymer and an overcoat or a preformed film adhered to the primer layer. Either the overcoat or the preformed liner also comprises a fluoropolymer, and preferably a perfluoropolymer. The surface of the lining facing the flowable media, such as oil, may be a pure perfluoropolymer to provide a particularly good non-stick surface for the oil.Type: ApplicationFiled: May 26, 2009Publication date: October 29, 2009Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Laurence Waino McKeen, Pidatala K. Mohan, Steven A. Mestemacher, Kimberly Dawn Farnsworth, W. Douglas Obal