Patents by Inventor Sofia Sirak
Sofia Sirak 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: 12252661Abstract: A method for the preparation of homo- and copolymers of alkyl (meth)acrylates having a low residual monomer content involves preparing a reaction mixture containing monomers, charging the reaction mixture, heating the reaction mixture, adding an additional monomer after initial monomer conversion, and optional further processing of the reaction mixture. The homo- and copolymers of alkyl (meth)acrylates obtained by this method as useful in lubricant applications.Type: GrantFiled: December 17, 2021Date of Patent: March 18, 2025Assignee: Evonik Operations GmbHInventors: Frank-Olaf Mähling, Maria Stimeier, Thomas Schimmel, Stefan Karl Maier, Sofia Sirak
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Publication number: 20250011637Abstract: The invention relates to new ethylene vinyl acetate-based polymer dispersions with increased stability compared to state-of-the-art and to a preparation process thereof. The invention also relates to a method for inhibiting wax deposition and reducing the pour point, viscosity and yield stress of crude oils by treating the crude oils with these stable ethylene vinyl acetate-based polymer dispersions.Type: ApplicationFiled: November 10, 2022Publication date: January 9, 2025Applicant: Evonik Operations GmbHInventors: Sofia SIRAK, Alisa BORGER, Jasmin MEURER, Claudia Meister, Gaël MOSNIER, Johannes RIEGER, Ines BERWING, Marie-Christin WINKLER
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Publication number: 20250002614Abstract: A process is developed for large scale manufacturing of low molecular weight polyacrylates via free radical polymerization. The process includes a first reaction mixture including a solvent or mixture of solvents; a second reaction mixture including a monomer composition of C1-C4 alkyl acrylates or a mixture thereof; a third reaction mixture including a solvent or a mixture of solvents, an initiator and a chain transfer agent; and a free radical polymerization. With the process, low molecular weight polyacrylates are obtained with resulting monomer conversion rates of more than 96% and weight average molecular weights below 15,000 g/mol.Type: ApplicationFiled: June 29, 2022Publication date: January 2, 2025Applicant: Evonik Operations GmbHInventors: Sofia Sirak, Gaël Mosnier, Claudia Meister, Sascha Hirm
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Patent number: 11999901Abstract: A composition for use as a multifunctional wax dispersant can treat subterranean formations for the recovery of oil and gas from oil and gas wells. A process can be used for the preparation thereof. A method for treating a crude oil with a wax dispersant composition according to the present invention reduces interfacial tension between the crude oil and the treatment fluids in the recovery of oil and gas from crude oil and gas wells.Type: GrantFiled: April 26, 2023Date of Patent: June 4, 2024Assignee: Evonik Operations GmbHInventors: Liang Xu, Sofia Sirak, Iryna Zhuk, Claudia Meister
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Publication number: 20240043768Abstract: A method for the preparation of homo- and copolymers of alkyl (meth)acrylates having a low residual monomer content involves preparing a reaction mixture containing monomers, charging the reaction mixture, heating the reaction mixture, adding an additional monomer after initial monomer conversion, and optional further processing of the reaction mixture. The homo- and copolymers of alkyl (meth)acrylates obtained by this method as useful in lubricant applications.Type: ApplicationFiled: December 17, 2021Publication date: February 8, 2024Applicant: Evonik Operations GmbHInventors: Frank-Olaf Mähling, Maria Stimeier, Thomas Schimmel, Stefan Karl Maier, Sofia Sirak
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Publication number: 20230416596Abstract: A composition for use as a multifunctional wax dispersant can treat subterranean formations for the recovery of oil and gas from oil and gas wells. A process can be used for the preparation thereof. A method for treating a crude oil with a wax dispersant composition according to the present invention reduces interfacial tension between the crude oil and the treatment fluids in the recovery of oil and gas from crude oil and gas wells.Type: ApplicationFiled: April 26, 2023Publication date: December 28, 2023Applicant: Evonik Operations GmbHInventors: Liang Xu, Sofia Sirak, Iryna Zhuk, Claudia Meister
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Publication number: 20230348777Abstract: A composition for use as a multifunctional wax dispersant can treat subterranean formations for the recovery of oil and gas from oil and gas wells. A process can be used for the preparation thereof. A method for treating a crude oil with a wax dispersant composition according to the present invention reduces interfacial tension between the crude oil and the treatment fluids in the recovery of oil and gas from crude oil and gas wells.Type: ApplicationFiled: April 27, 2023Publication date: November 2, 2023Applicant: Evonik Operations GmbHInventors: Liang XU, Sofia Sirak, Iryna Zhuk, Claudia Meister
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Patent number: 11421180Abstract: The invention relates to oil formulation comprising C16-20 oils being stabilized for low temperature storage and preparation processes thereof. The invention also relates to the preparation of specific polymer compounds and their use as stabilizers for low temperature storage of C16-20 oils.Type: GrantFiled: February 5, 2019Date of Patent: August 23, 2022Assignee: Evonik Operations GmbHInventors: Sofia Sirak, Justin Langston, Gabriel Walkup, Thomas McGregor, Benjamin McFadden
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Patent number: 11359042Abstract: The present invention relates to copolymers, to a method for the preparation of these copolymers, to the use of these copolymers for reducing wear in a lubricant composition, to lubricant compositions comprising these copolymers, and to the use of these lubricant compositions as an automatic transmission fluid, a continuously variable transmission fluid, an engine oil, a gear oil, or a hydraulic oil.Type: GrantFiled: May 17, 2017Date of Patent: June 14, 2022Assignee: Evonik Operations GmbHInventors: Sofia Sirak, Dmitriy Shakhvorostov, Ines Berwing, Denise Bingel
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Patent number: 11198833Abstract: The invention relates to polymeric-inorganic nanoparticle compositions and preparation processes thereof. The invention also relates to an additive and lubricant compositions comprising these polymeric-inorganic nanoparticle compositions, as well as to the use of these polymeric-inorganic nanoparticle compositions in an oil lubricant formulation to improve tribological performance, in particular to improve extreme pressure performance and friction reduction on metal parts.Type: GrantFiled: January 22, 2019Date of Patent: December 14, 2021Assignee: Evonik Operations GmbHInventors: Stephan Wieber, Christofer Philipp Kronschnabl, Ronny Sondjaja, Sofia Sirak, Daniel Neß, Roland Wilkens, Günter Schmitt, Can Metehan Turhan
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Patent number: 11180712Abstract: The invention relates to polymeric-inorganic nanoparticle compositions and preparation processes thereof. The invention also relates to an additive and lubricant composition comprising these polymeric-inorganic nanoparticle compositions, as well as to the use of these polymeric-inorganic nanoparticle compositions in an oil lubricant formulation to improve tribological performance, in particular to improve anti-friction performance on metal parts.Type: GrantFiled: January 22, 2019Date of Patent: November 23, 2021Assignee: Evonik Operations GmbHInventors: Stephan Wieber, Sofia Sirak, Daniel Neß, Roland Wilkens, Rebecca Jüstel, Günter Schmitt, Michael Hagemann
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Patent number: 10954466Abstract: The invention relates to polymeric-inorganic nanoparticles and preparation processes thereof. The invention also relates to a powder, concentrate and lubricating composition comprising these polymeric-inorganic nanoparticles, to a method of dispersing nanoparticles in lubricating oil, as well as the use of these polymeric-inorganic particles in an oil lubricant formulation to reduce pour point, friction and wear.Type: GrantFiled: July 24, 2017Date of Patent: March 23, 2021Assignee: Evonik Operations GmbHInventors: Sofia Sirak, Can Metehan Turhan, Daniel Neß, Jennifer Holtzinger, Maximilian Cornelius
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Publication number: 20210062106Abstract: The invention relates to polymeric-inorganic nanoparticle compositions and preparation processes thereof. The invention also relates to an additive and lubricant composition comprising these polymeric-inorganic nanoparticle compositions, as well as to the use of these polymeric-inorganic nanoparticle compositions in an oil lubricant formulation to improve tribological performance, in particular to improve anti-friction performance on metal parts.Type: ApplicationFiled: January 22, 2019Publication date: March 4, 2021Applicant: Evonik Operations GmbHInventors: Stephan Wieber, Sofia Sirak, Daniel Neß, Roland Wilkens, Rebecca Jüstel, Günter Schmitt, Michael Hagemann
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Publication number: 20200369977Abstract: The invention relates to polymeric-inorganic nanoparticle compositions and preparation processes thereof. The invention also relates to an additive and lubricant compositions comprising these polymeric-inorganic nanoparticle compositions, as well as to the use of these polymeric-inorganic nanoparticle compositions in an oil lubricant formulation to improve tribological performance, in particular to improve extreme pressure performance and friction reduction on metal parts.Type: ApplicationFiled: January 22, 2019Publication date: November 26, 2020Applicant: Evonik Operations GmbHInventors: Stephan Wieber, Christofer Philipp Kronschnabl, Ronny Sondjaja, Sofia Sirak, Daniel Neß, Roland Wilkens, Günter Schmitt, Can Metehan Turhan
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Publication number: 20200354646Abstract: The invention relates to oil formulation comprising C16-20 oils being stabilized for low temperature storage and preparation processes thereof. The invention also relates to the preparation of specific polymer compounds and their use as stabilizers for low temperature storage of C16-20 oils.Type: ApplicationFiled: February 5, 2019Publication date: November 12, 2020Applicant: Evonik Operations GmbHInventors: Sofia Sirak, Justin Langston, Gabriel Walkup, Thomas McGregor, Benjamin McFadden
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Patent number: 10787623Abstract: The invention relates to low molecular weight hydrogenated polybutadienes and to a method for the preparation of these polymers. The invention is also directed to lubricant compositions comprising these polymers and uses thereof.Type: GrantFiled: February 27, 2018Date of Patent: September 29, 2020Assignee: Evonik Operations GmbHInventors: Sofia Sirak, Holger Pletsch, Marius Kemper
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Publication number: 20200262953Abstract: The present invention relates to copolymers, to a method for the preparation of these copolymers, to the use of these copolymers for reducing wear in a lubricant composition, to lubricant compositions comprising these copolymers, and to the use of these lubricant compositions as an automatic transmission fluid, a continuously variable transmission fluid, an engine oil, a gear oil, or a hydraulic oil.Type: ApplicationFiled: May 17, 2017Publication date: August 20, 2020Applicant: Evonik Operations GmbHInventors: Sofia SIRAK, Dmitriy SHAKHVOROSTOV, Ines BERWING, Denise BINGEL
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Publication number: 20190264127Abstract: The invention relates to polymeric-inorganic nanoparticles and preparation processes thereof. The invention also relates to a powder, concentrate and lubricating composition comprising these polymeric-inorganic nanoparticles, to a method of dispersing nanoparticles in lubricating oil, as well as the use of these polymeric-inorganic particles in an oil lubricant formulation to reduce pour point, friction and wear.Type: ApplicationFiled: July 24, 2017Publication date: August 29, 2019Applicant: Evonik Oil Additives GmbHInventors: Sofia SIRAK, Can Metehan TURHAN, Daniel NEß, Jennifer HOLTZINGER, Maximilian CORNELIUS
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Publication number: 20180245013Abstract: The invention relates to low molecular weight hydrogenated polybutadienes and to a method for the preparation of these polymers. The invention is also directed to lubricant compositions comprising these polymers and uses thereof.Type: ApplicationFiled: February 27, 2018Publication date: August 30, 2018Applicant: Evonik Oil Additives GmbHInventors: Sofia Sirak, Holger Pletsch, Marius Kemper