Patents by Inventor Anh D. Nguyen
Anh D. Nguyen 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: 7819385Abstract: A threadform for a gate valve has a set of threads on a stem that engage a threaded receptacle of the gate. When the stem is rotated, the gate moves. The threads have a thread height to thread base thickness ratio that is at least the inverse of 0.7 times e raised to 0.388 divided by a nominal thread diameter of the threads. That ratio is at least 1.1.Type: GrantFiled: August 6, 2007Date of Patent: October 26, 2010Assignee: Vetco Gray Inc.Inventors: Rick C. Hunter, Anh D. Nguyen
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Publication number: 20080029728Abstract: A threadform for a gate valve has a set of threads on a stem that engage a threaded receptacle of the gate. When the stem is rotated, the gate moves. The threads have a thread height to thread base thickness ratio that is at least the inverse of 0.7 times e raised to 0.388 divided by a nominal thread diameter of the threads. That ratio is at least 1.1.Type: ApplicationFiled: August 6, 2007Publication date: February 7, 2008Applicant: Vetco Gray Inc.Inventors: Rick C. Hunter, Anh D. Nguyen
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Patent number: 6017168Abstract: An undersea telescopic joint for a riser system is connected to a drilling vessel with a plurality of tensioners. The joint has a bearing with inner and outer annular mating members. A cap seals the outer member to the joint. The outer member closely receives and is axially movable relative to the inner member. A flat thrust bearing is located in a chamber between the two members. The members are sealed to one another with upper and lower swivel seals. A passage communicates hydraulic fluid to the chamber. The bearing has a pressure gage which registers with a passage that extends between the swivel seals. The chamber is filled with hydraulic fluid so that the two members are separated and the drilling vessel may rotate easily. The gage is used to detect whether the primary swivel seal is leaking.Type: GrantFiled: December 22, 1997Date of Patent: January 25, 2000Assignee: ABB Vetco Gray Inc.Inventors: Thomas A. Fraser, Jr., Anh D. Nguyen, Derek C. Kennedy
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Patent number: 5454890Abstract: A cap-sensitive emulsion explosive capable of being used in packaged explosive products. The explosive contains ammonium nitrate prills of a bulk density of 0.70 to 1.00 g/cc, with a particle density of 1.25 to 1.40 g/cc. A polysuccinic anhydride based emulsifying agent is used as an emulsifying agent. Packaged explosives prepared according to the present invention have improved package stability, and allow for control of the ratio of shock energy to heave energy.Type: GrantFiled: February 8, 1993Date of Patent: October 3, 1995Assignee: ICI Canada Inc.Inventors: William B. Evans, Anh D. Nguyen
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Patent number: 4997494Abstract: A process for the production of a chemically gassed emulsion explosive wherein a chemical gassing agent is added to the emulsion as an essentially dry particulate powder. The process allows for the production of stable emulsion explosives which have more controllable emulsion explosive characteristics.Type: GrantFiled: July 16, 1990Date of Patent: March 5, 1991Assignee: ICI Canada Inc.Inventor: Anh D. Nguyen
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Patent number: 4994124Abstract: A chemically sensitized dry explosive is provided, which can be used as a blasting agent, per se, or can be used in the production of a wide variety of explosive compositions. The compositions are typically manufactured from an unstable emulsion explosive and have a chemical sensitizer in either the continuous or discontinuous phase. The compositions are characterized in that they comprise 5 to 30% water in the discontinuous phase after crystallization of the composition.Type: GrantFiled: May 15, 1990Date of Patent: February 19, 1991Assignee: ICI Canada Inc.Inventor: Anh D. Nguyen
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Patent number: 4936931Abstract: An emulsion explosive composition comprising a discontinuous oxidizer phase and a continuous fuel phase is provided wherein the fuel phase comprises a nitroalkane compound. The composition essentially contains as the emulsifying agent a polyisobutylene succinic anhydride-based compound in admixture with an ester of 1-4 sorbitan and oleic acid. The composition demonstrates high explosive strength and excellent stability.Type: GrantFiled: November 29, 1989Date of Patent: June 26, 1990Assignee: C-I-L Inc.Inventors: Anh D. Nguyen, Alain J. Gagnon
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Patent number: 4936932Abstract: An emulsion explosive composition comprising a discontinuous oxidizer phase and a continuous fuel phase is provided wherein the fuel phase comprises an aromatic hydrocarbon compound. The composition essentially contains as the emulsifying agent a polyisobutylene succinic anyhdride-based compound in admixture with an ester of 1-4 sorbitan and oleic acid. The composition demonstrates high explosive strength and excellent stability.Type: GrantFiled: November 2, 1989Date of Patent: June 26, 1990Assignee: C-I-L Inc.Inventor: Anh D. Nguyen
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Patent number: 4718953Abstract: A novel heterogeneous, cap-sensitive high explosive is provided which comprises a crystalline inorganic nitrate salt having dispersed throughout the matrix of the salt crystal a hydroxyalkyl nitrate fuel. Particularly preferred are ammonium nitrate crystals having dispersed therein ethylene glycol mononitrate. The crystalline high explosive is dry and free flowing and may be used per se, in admixture with bulking agents or fluidizing agents or may be used as a replacement for a substantial amount of nitroglycerine in conventional dynamite compositions.Type: GrantFiled: July 10, 1987Date of Patent: January 12, 1988Assignee: C-I-L Inc.Inventors: Anh D. Nguyen, William B. Evans, Donald G. Ballantyne
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Patent number: 4305393Abstract: Peat moss having increased wettability and increased brightness while maintaining its absorbency and structural integrity is provided. The peat moss is treated so as to chemically graft onto its structure, unhydrolized polymeric chains of the general formula: ##STR1## wherein R.sup.1 and R.sup.2 are selected from the group consisting of hydrogen and --CH.sub.3, X and Y are selected from the group consisting of --CN, --COONH.sub.2 and --OCH.sub.3 and wherein m and n are integers which when summed together equal at least 500.Type: GrantFiled: August 9, 1979Date of Patent: December 15, 1981Assignee: Johnson & JohnsonInventor: Anh D. Nguyen
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Patent number: 4022863Abstract: The present invention relates to plastic extruded strapping and its processing techniques. More particularly, it is concerned with polyester extruded strapping of high tensile strength and low elongation at break to replace steel strapping. Although not limited thereto, this invention is of primary importance in connection with the technique of crystallization and orientation of polyester predominantly in one direction in the making of strap characterized by two-step stretching. Furthermore, this invention is related to the design of a multi-purpose extrusion line for the processing of strap of various polymeric materials.Type: GrantFiled: June 4, 1975Date of Patent: May 10, 1977Assignee: Caristrap CorporationInventors: Thomas J. Karass, Anh D. Nguyen, Paul Vegvari