Patents by Inventor Manoj K. Gupta
Manoj K. Gupta 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: 9909440Abstract: A seal for a turbomachine is disclosed. The seal assembly includes a rotatable shaft having a stepped outer circumferential surface that defines one or more annular protrusions axially-spaced thereon. A seal is radially-offset from the rotatable shaft and has one or more annular recesses that extend radially-outward from the inner circumferential surface of the seal. A plurality of holes are defined in both the inner circumferential surface and the one or more annular recesses of the seal, the one or more annular recesses being axially-spaced from each other and configured to receive the one or more annular protrusions in an interlocking fit.Type: GrantFiled: March 23, 2012Date of Patent: March 6, 2018Assignee: Dresser-Rand CompanyInventors: Manoj K. Gupta, Steven Nove, Thomas Soulas, Krishnaswamy Ramesh, Glenn Grosso
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Publication number: 20140191475Abstract: A seal for a turbomachine is disclosed. The seal assembly includes a rotatable shaft having a stepped outer circumferential surface that defines one or more annular protrusions axially-spaced thereon. A seal is radially-offset dially-offset from the rotatable shaft and has one or more annular recesses that extend radially-outward from the inner circumferential surface of the seal. A plurality of holes are defined in both the inner circumferential surface and the one or more annular recesses of the seal, the one or more annular recesses being axially-spaced from each other and configured to receive the one or more annular protrusions in an interlocking fit.Type: ApplicationFiled: March 23, 2012Publication date: July 10, 2014Applicant: DRESSER-RAND COMPANYInventors: Manoj K. Gupta, Steven Nove, Thomas Soulas, Krishnaswamy Ramesh, Glenn Grosso
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Patent number: 8596954Abstract: A compressor is disclosed having a shaft seal assembly and system that allows a high-pressure compressor to settle-out at a lower pressure level during shutdown. The seal assembly may be disposed about a portion of the shaft and define a blow-down seal chamber, the seal assembly including one or more gas seals in fluid communication with the blow-down seal chamber. A blow-down line is communicably coupled to the blow-down seal chamber to reference the blow-down seal chamber to a low pressure reference, such as a separate centrifugal compressor, or the like. Referencing the blow-down seal chamber to the low pressure reference reduces the required sealing pressure of the one or more gas seals. A valve may be disposed in the blow-down line and configured to regulate a flow of process gas leakage through the blow-down line.Type: GrantFiled: June 28, 2011Date of Patent: December 3, 2013Assignee: Dresser-Rand CompanyInventors: Manoj K. Gupta, Jose L. Gilarranz, Steven Nove, Kenneth Devito
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Publication number: 20130129471Abstract: A compressor is disclosed having a shaft seal assembly and system that allows a high-pressure compressor to settle-out at a lower pressure level during shutdown. The seal assembly may be disposed about a portion of the shaft and define a blow-down seal chamber, the seal assembly including one or more gas seals in fluid communication with the blow-down seal chamber. A blow-down line is communicably coupled to the blow-down seal chamber to reference the blow-down seal chamber to a low pressure reference, such as a separate centrifugal compressor, or the like. Referencing the blow-down seal chamber to the low pressure reference reduces the required sealing pressure of the one or more gas seals. A valve may be disposed in the blow-down line and configured to regulate a flow of process gas leakage through the blow-down line.Type: ApplicationFiled: June 28, 2011Publication date: May 23, 2013Applicant: Dresser-Rand CompanyInventors: Manoj K. Gupta, Jose L. Gilarranz, Steven Nove, Kenneth Devito
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Patent number: 6395860Abstract: The polyisocyanate ester compound is a branched material having at least two ester linkages, at least four urethane linkages further from the center of the compound compared to the ester linkages, and at least one terminal isocyanate group for each urethane linkage, which isocyanate group may be blocked. The compound can be prepared by first by reacting a polyol compound having at least two hydroxyl groups with a carboxylic acid compound having one carboxylic acid group and at least two hydroxyl groups to form a hydroxyl-functional ester product. The hydroxyl-functional ester product is then reacted with a polyisocyanate compound in which the isocyanate groups have different reactivities. The reaction with the polyisocyanate compound is carried out under conditions so that only one of the isocyanate groups is substantially reactive with the hydroxyl groups of the ester product of the first stage.Type: GrantFiled: September 26, 2000Date of Patent: May 28, 2002Assignee: BASF CorporationInventors: Swaminathan Ramesh, Manoj K. Gupta
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Patent number: 6391970Abstract: A resinous binder useful in clear coat compositions comprises a) a polyepoxide such as a copolymer of an ethylenically unsaturated epoxide with other (meth)acrylate(s) or styrene, b) a polyacid such as a carboxyl-terminated polyester, and c) a polyisocyanate.Type: GrantFiled: December 2, 1998Date of Patent: May 21, 2002Assignee: BASF CorporationInventors: Swaminathan Ramesh, Manoj K. Gupta
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Patent number: 5637570Abstract: Novel dlsubstituted and trisubstituted derivatives of 2,3:4,6-di-O-isopropylidene-.alpha.-L-xylo-2-hexulofuranosonic acid containing at least one alkyl group at position 1, position 4 being occupied by OH, O-alkylamino or O-alkylaminoheterocyclic moiety, and the OH group at position 6 being replaced by a saturated heterocyclic moiety or aminoalkyl heterocyclic group. These compounds exhibit anti-cancer, anti-inflammatory and/or anti-proliferative activities. Methods of preparation, pharmaceutical compositions containing the compounds and methods of treating cancer, inflammatory and/or autoimmune disorders employing the compounds are described.Type: GrantFiled: May 9, 1995Date of Patent: June 10, 1997Assignee: Chemora PharmochemInventors: Sudershan K. Arora, Manoj K. Gupta, Pushappam Lukos, Ravinder Kumar, Shanti N. Sawhney
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Patent number: 5066693Abstract: Phenolic molding compositions, particularly useful as sheet molding compositions comprise: 1) a resole phenole resin, 2) a thickening agent selected from the group consisting of alkaline earth metal oxides or hydroxides and silanes, 3) a filler selected from the group consisting of clay, talc, and mixtures thereof, and 4) an epoxy resin.Type: GrantFiled: February 12, 1990Date of Patent: November 19, 1991Assignee: Occidental Chemical CorporationInventor: Manoj K. Gupta
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Patent number: 5015529Abstract: Phenolic molding compositions, particularly useful as sheet molding compositions comprise: (1) a resole phenolic resin, (2) a thickening agent selected from the group consisting of alkaline earth metal oxides or hydroxides and silanes, (3) a filler selected from the group consisting of clay, talc, and mixtures thereof, and (4) an epoxy resin.Type: GrantFiled: September 14, 1988Date of Patent: May 14, 1991Assignee: Occidental Chemical CorporationInventor: Manoj K. Gupta
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Patent number: 4794051Abstract: Phenolic molding compositions, particularly useful as sheet molding compounds comprise:(a) a resole phenolic resin,(b) a curing agent selected from the group consisting of alkaline earth metal oxides or hydroxides and silanes,(c) a filler,(d) a lactone such as butyrolactone, and(e) a fiber reinforcement.Type: GrantFiled: May 11, 1987Date of Patent: December 27, 1988Assignee: Occidental Chemical CorporationInventor: Manoj K. Gupta
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Patent number: 4785040Abstract: Novel phenolic molding compositions comprise (1) a resole phenolic resin, (2) an alkaline earth metal hydroxide or oxide, and/or a silane compound, and (3) a mixture of clay and talc fillers and/or microballoons. The composition also generally contains a mold release agent, and a silane coupling agent. The alkaline earth metal hydroxide or oxide is preferably calcium and/or magnesium hydroxide or oxide. A mixture of the calcium and magnesium compounds is most preferred. The foregoing molding compositions are applied to glass fibers or filaments to provide compositions useful in sheet molding compound processes, pultrusion processes, filament winding, and continuous laminating processes, as well as in ram injection molding and transfer molding.Type: GrantFiled: October 4, 1985Date of Patent: November 15, 1988Assignee: Occidental Chemical CorporationInventors: Manoj K. Gupta, Donald W. Hoch, Gideon Salee
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Patent number: 4593060Abstract: Smoke retardant compositions comprise a polyvinyl halide resin and a smoke retardant proportion of tin oxalate or calcium oxalate. Small amounts of zinc oxide, magnesium oxide or titanium oxide can also be included to provide cost effective smoke and fire retardant compositions. In flexible compositions a fire retardant additive such as aluminum trihydrate is used.Type: GrantFiled: April 17, 1985Date of Patent: June 3, 1986Assignee: Occidental Chemical CorporationInventors: Manoj K. Gupta, Gideon Salee