Patents by Inventor Mahesh Subramaniyam

Mahesh Subramaniyam 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).

  • Publication number: 20190248718
    Abstract: The present invention relates to an improved amine based additive composition for control and inhibition of polymerization of aromatic vinyl monomers, particularly of styrene comprising one or more quinone methide compounds, one or more phenolic compounds and further comprising at least one aliphatic tertiary amine containing —OH group in the alkyl chain. In one embodiment, the present invention also relates to method of use of presently provided composition. In another embodiment, the present invention also relates to method of controlling and inhibiting polymerization of aromatic vinyl monomers, particularly of styrene by employing presently provided composition. In still another embodiment, the present invention also relates to method of preparation of presently provided composition.
    Type: Application
    Filed: February 9, 2017
    Publication date: August 15, 2019
    Inventor: Mahesh SUBRAMANIYAM
  • Patent number: 10316203
    Abstract: The present invention relates to adhesion promoting composition comprising: (a) an organotitanate adhesion promoter; and (b) at least one surface active agent; and (c) optionally comprises at least one solvent; wherein the surface active agent comprises a compound selected from the group comprising a surfactant and a polymeric surfactant; wherein the adhesion promoting composition imparts adhesion on a polymer film even if: (i) quality of the film substrate has degraded, (ii) the film substrate has inconsistent surface treatments across the films. In second aspect, the present invention relates to ink compositions comprising the adhesion promoting composition. In third aspect, the present invention relates to a method for improving the adhesion of an ink composition to a substrate, wherein the ink composition comprises adhesion promoting composition.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: June 11, 2019
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventors: Mahesh Subramaniyam, Michael Michalczyk
  • Publication number: 20190010403
    Abstract: The present invention relates to an additive composition for scavenging hydrogen sulfide in hydrocarbons, wherein said additive composition comprises a combination of (a) glyoxal and (b) at least one aliphatic tertiary amine or oxide treated derivative thereof, or a mixture of the aliphatic tertiary amine and the oxide treated derivative thereof. In one embodiment it also relates to a method for scavenging hydrogen sulfide in hydrocarbons, and in another embodiment it relates to a method of using an additive composition of the present invention for scavenging hydrogen sulfide in hydrocarbons. In yet another embodiment it relates to a composition for scavenging hydrogen sulfide in hydrocarbons comprising (A) a hydrocarbon and (B) a hydrogen sulfide scavenging additive composition of the present invention.
    Type: Application
    Filed: December 26, 2016
    Publication date: January 10, 2019
    Inventor: Mahesh SUBRAMANIYAM
  • Publication number: 20190002768
    Abstract: The present invention relates to a hydrogen sulphide scavenging additive composition for scavenging hydrogen sulphide including sulfur containing compounds and mercaptans, particularly for scavenging hydrogen sulfide in hydrocarbons, wherein the additive composition comprises substantially reduced amount of nitrogen based hydrogen sulfide scavengers, and is also required in substantially reduced amount, and wherein the additive composition scavenges the sulfur containing compounds not only at room temperature, but also at higher temperatures, and comprises at least a combination of: (A) at least one nitrogen based hydrogen sulfide scavenger; and (B) at least one aliphatic tertiary amine, wherein the nitrogen based hydrogen sulfide scavenger comprises triazine based hydrogen sulfide scavenger.
    Type: Application
    Filed: December 23, 2016
    Publication date: January 3, 2019
    Inventor: Mahesh SUBRAMANIYAM
  • Publication number: 20180185782
    Abstract: The present invention relates to a hydrogen sulfide scavenging additive composition, wherein the composition comprises: a. an additive 1 comprising at least one compound selected from the group comprising zinc compound, zinc soap, and zinc salt of organic acid; and b. at least one activator comprising one or more hydroxyl alkylated amine. In one embodiment, the composition further comprises an additive 2 comprising polyphosphoric acid (PPA). In one embodiment, the present invention also relates to a method of using the hydrogen sulfide scavenging additive compositions of the present invention for scavenging the hydrogen sulfide in the medium. In one embodiment, the present invention also relates to a method of scavenging hydrogen sulphide in the medium by employing the hydrogen sulfide scavenging additive compositions of the present invention. In one embodiment, the present invention also relates to a medium comprising hydrogen sulfide (H2S) scavenging additive compositions of the present invention.
    Type: Application
    Filed: June 17, 2016
    Publication date: July 5, 2018
    Inventor: Mahesh SUBRAMANIYAM
  • Publication number: 20180163145
    Abstract: The present invention relates to a demulsification composition for demulsification of water-in-oil emulsion formed due to mixing of wash water in the crude oil, wherein the composition comprises (a) a compound selected from the group comprising glyoxal, neutralized glyoxal, glyoxal derivative and a mixture thereof, and (b) one or more demulsifiers. In one embodiment, the present invention relates to a method of demulsification of water-in-oil emulsions by treating it with the present demulsification composition. In another embodiment, the present invention relates to a method of using the present additive composition for demulsification of water-in-oil emulsions.
    Type: Application
    Filed: June 13, 2016
    Publication date: June 14, 2018
    Inventor: Mahesh SUBRAMANIYAM
  • Patent number: 9890339
    Abstract: The present invention relates to the field of corrosion inhibition in hydrocarbon fluid processing units. The present invention comprises a new additive for inhibiting acid corrosion comprising polymeric thiophosphate ester, which is obtained by reaction of a polymer compound having mono, di or poly hydroxyl group, preferably polymer compound which is hydroxyl-termination, more preferably said polymer compound comprising hydroxyl-terminated polyisobutylene or polybutene and phosphorous pentasulphide. Said polymeric thiophosphate ester is further reacted with any oxide selected from group consisting of ethylene oxide, butylenes oxide or propylene oxide or such other oxide, preferably ethylene oxide, capably forming ethylene oxide derivative of thiophosphate ester. The invention is useful effecting acid corrosion inhibition on the metal surfaces of a distillation unit, distillation column, trays, packing and pump around piping.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: February 13, 2018
    Assignee: Dorf Ketal Chemicals (I) Private Limited
    Inventor: Mahesh Subramaniyam
  • Patent number: 9777230
    Abstract: The present invention relates to inhibition of high temperature naphthenic acid corrosion occurring in hydrocarbon processing units.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: October 3, 2017
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam
  • Patent number: 9725649
    Abstract: The present invention relates to additive composition for controlling and inhibition of polymerization of aromatic vinyl monomers including styrene comprising (a) one or more of nitroxide (i.e. nitroxyl) compounds, and characterized in that the said composition further comprises one or more of (b) aliphatic amines selected from a group comprising tertiary amines, secondary amines and primary amines. In one embodiment, the present invention also relates to method of use of presently provided composition. In another embodiment, the present invention also relates to method of controlling and inhibiting polymerization of aromatic vinyl monomers including styrene by employing presently provided composition. In still another embodiment, the present invention also relates to method of preparation of presently provided composition.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: August 8, 2017
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam
  • Publication number: 20170183517
    Abstract: The present invention relates to adhesion promoting composition comprising: (a) an organotitanate adhesion promoter; and (b) at least one surface active agent; and (c) optionally comprises at least one solvent; wherein the surface active agent comprises a compound selected from the group comprising a surfactant and a polymeric surfactant; wherein the adhesion promoting composition imparts adhesion on a polymer film even if: (i) quality of the film substrate has degraded, (ii) the film substrate has inconsistent surface treatments across the films. In second aspect, the present invention relates to ink compositions comprising the adhesion promoting composition. In third aspect, the present invention relates to a method for improving the adhesion of an ink composition to a substrate, wherein the ink composition comprises adhesion promoting composition.
    Type: Application
    Filed: July 9, 2015
    Publication date: June 29, 2017
    Inventors: Mahesh SUBRAMANIYAM, Michael MICHALCZYK
  • Patent number: 9637691
    Abstract: The present invention relates to hydrogen sulfide scavenging additive composition comprising glyoxal and a polymer compound which is polymer made from propylene oxide, which is capable of scavenging or removing hydrogen sulfide in hydrocarbons or hydrocarbon streams without causing any problem. The present invention is also relates to a method of scavenging hydrogen sulfide employing present scavenging additive composition comprising glyoxal and a polymer compound which is polymer made from propylene oxide. The present invention is also relates to a method of using hydrogen sulfide scavenging additive composition comprising glyoxal and a polymer compound which is polymer made from propylene oxide.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: May 2, 2017
    Assignee: Dorf Ketal Chemicals (India) Private Limtied
    Inventor: Mahesh Subramaniyam
  • Patent number: 9598333
    Abstract: The present invention relates to additive composition and method of use thereof for controlling and inhibition of polymerization and dimerization of aliphatic monomers including butadiene comprising A) one or more of first component selected from a group comprising a) quinone methide (QM), b) quinone methide (QM) derivative including ester derivative of quinone methide, c) nitroxide (i.e. nitroxyl) compounds, and d) mixture thereof; characterized in that the composition further comprises B) one or more of second component selected from amines or polyamines, wherein the amine and polyamine is selected from a group comprising i) oxide treated tertiary amines, ii) hydroxyl alkyl tertiary amines, iii) polyether amines, and iv) mixture thereof.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: March 21, 2017
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam
  • Publication number: 20160362619
    Abstract: The present invention relates to inhibition of high temperature naphthenic acid corrosion occurring in hydrocarbon processing units.
    Type: Application
    Filed: August 23, 2016
    Publication date: December 15, 2016
    Inventor: Mahesh SUBRAMANIYAM
  • Patent number: 9434889
    Abstract: There is provided an additive and method for removal of calcium from crude oil or its blends containing calcium naphthenate at low pH as well as at high pH. Particularly, there is also provided an additive and method for removal of calcium from crude oil or its blends containing calcium naphthenate under basic or alkaline conditions and at low pH as well as at high pH varying from about 5 to 11.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: September 6, 2016
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam
  • Patent number: 9334445
    Abstract: The present invention relates to amine based additive composition for controlling and inhibition of polymerization of aromatic vinyl monomers including styrene comprising (a) one or more of nitroxide (i.e. nitroxyl) compounds; and (b) one or more of aromatic nitro compounds, characterized in that the said composition further comprises one or more of (c) amines, wherein said amine is selected from a group comprising (i) hydroxyl alkyl tertiary amines, (ii) tertiary alkyl amines, (iii) hydroxyl alkyl primary amine; and (iv) mixture thereof. In one embodiment, the present invention also relates to method of using presently provided composition. In another embodiment, the present invention also relates to method of controlling and inhibiting polymerization of aromatic vinyl monomers including styrene by employing presently provided composition. In still another embodiment, the present invention also relates to method of preparation of presently provided composition.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: May 10, 2016
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam
  • Publication number: 20160083315
    Abstract: The present invention relates to additive composition and method of use thereof for controlling and inhibition of polymerization and dimerization of aliphatic monomers including butadiene comprising A) one or more of first component selected from a group comprising a) quinone methide (QM), b) quinone methide (QM) derivative including ester derivative of quinone methide, c) nitroxide (i.e. nitroxyl) compounds, and d) mixture thereof; characterized in that the composition further comprises B) one or more of second component selected from amines or polyamines, wherein the amine and polyamine is selected from a group comprising i) oxide treated tertiary amines, ii) hydroxyl alkyl tertiary amines, iii) polyether amines, and iv) mixture thereof.
    Type: Application
    Filed: March 20, 2014
    Publication date: March 24, 2016
    Applicant: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam
  • Patent number: 9234057
    Abstract: The present invention relates to additive composition for control and inhibition of polymerization of monomers including styrene, wherein the composition consists of: (a) one or more of quinone methide derivatives; and CHARACTERIZED IN THAT the composition further comprises: (b) one or more of tertiary amines, wherein said tertiary amine is selected from a group consisting of: (i) tri isopropanol amine (TIPA), (ii) N,N,N?,N?-Tetrakis(2-hydroxyethyl)ethylene-diamine) (THEED), and (iii) mixture thereof. In one embodiment, the present invention relates to method of preparation thereof and uses thereof, and a method for controlling and inhibiting polymerization of monomers including styrene.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: January 12, 2016
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam
  • Patent number: 9228126
    Abstract: The present invention relates to an improved additive composition for control and inhibition of polymerization of aromatic vinyl monomers including styrene comprising one or more of aromatic nitro compounds and one or more of aliphatic tertiary amines. In one embodiment, the present invention also relates to method of use of presently provided composition. In another embodiment, the present invention also relates to method of controlling and inhibiting polymerization of aromatic vinyl monomers including styrene by employing presently provided composition. In still another embodiment, the present invention also relates to method of preparation of presently provided composition.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: January 5, 2016
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam
  • Patent number: 9228142
    Abstract: The present invention relates to the field of processing hydrocarbons which causes corrosion in the metal surfaces of processing units. The invention addresses the technical problem of high temperature naphthenic acid corrosion and sulphur corrosion and provides a solution to inhibit these types of corrosion. The three combination compositions are formed by three mixtures separately, with one mixture obtained by mixing compound A, which is obtained by reacting high reactive polyisobutylene (HRPIB) with phosphorous pentasulphide in presence of catalytic amount of sulphur with compound B such as trialkyl phosphate and second mixture obtained by mixing compound A with compound C such as phosphite like di-isodecyl phenyl phosphite, and third mixture obtained by mixing compound A with compound D such as a phosphonate, wherein each of these three mixtures independently provide high corrosion inhibition efficiency in case of high temperature naphthenic acid corrosion inhibition and sulphur corrosion inhibition.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: January 5, 2016
    Assignee: Dorf Ketal Chemicals (I) Private Limited
    Inventor: Mahesh Subramaniyam
  • Patent number: 9217107
    Abstract: The present invention relates to an improved amine based additive composition for control and inhibition of polymerization of aromatic vinyl monomers including styrene comprising one or more of the quinone methide or derivatives thereof, one or more of nitroxide compounds and further comprising one or more of aliphatic tertiary amines. In one embodiment, the present invention also relates to method of use of presently provided composition. In another embodiment, the present invention also relates to method of controlling and inhibiting polymerization of aromatic vinyl monomers, particularly of styrene by employing presently provided composition. In still another embodiment, the present invention also relates to method of preparation of presently provided composition.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: December 22, 2015
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam