Patents by Inventor John A. Zakarian
John A. Zakarian 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: 8540869Abstract: A method for forming a finished lubricant comprises selecting a target high temperature viscosity for the finished lubricant. A target high temperature viscosity for a base oil blend is selected. The target high temperature viscosity for the base oil blend is less than the target high temperature viscosity for the finished lubricant. At least two base oils from at least three viscosity grades of base oils are selected and mixed to form a base oil blend that meets the target high temperature viscosity for the base oil blend. The base oil blend is mixed with performance additive package and viscosity modifier to provide a finished lubricant that meets the target high temperature viscosity for the finished lubricant. The at least two base oils for the base oil blend having the target high temperature viscosity are selected such that less viscosity modifier is needed to meet the target high temperature viscosity of the finished lubricant.Type: GrantFiled: December 10, 2007Date of Patent: September 24, 2013Assignee: Chevron U.S.A. Inc.Inventors: John A. Zakarian, Angelito T. Tirona
-
Publication number: 20120028863Abstract: The present invention is generally directed to methods of making application-specific finished lubricant compositions comprising bio-derived diester species. In some embodiments, bio-derived fatty acid moieties are reacted with Fischer-Tropsch/gas-to-liquids reaction products and/or by-products (e.g., gas-to-liquids-produced ?-olefins) to yield bio-derived diester species that can then be selectively blended with base oil and one or more additive species to yield an application-specific finished lubricant product having a biomass-derived component.Type: ApplicationFiled: July 29, 2010Publication date: February 2, 2012Inventors: David Christian Kramer, Nicole A. Ketterer, Nathan Todd Knotts, Mark Edward Okazaki, Stephen Joseph Miller, Saleh A. Elomari, Ravindra Shah, Allan George Hee, William Loh, Zhen Zhou, Randolph Albert Baer, John A. Zakarian, Gian Lawrence Fagan, Samil Beret
-
Publication number: 20110152141Abstract: A lubricating composition with improved storage stability comprising a major amount of an oil of lubricating viscosity, at least one alkali metal borate, at least one polysulfide mixture having at least 40% dihydrocarbyl tetrasulfide or higher sulfides, and at least one non-acidic phosphorus compound comprised of a trihydrocarbyl phosphate and a dihydrocarbyl dithiophosphate derivative is disclosed. In addition to improved storage stability, the composition has improved wear performance when the ratio of polysulfides is controlled.Type: ApplicationFiled: March 1, 2011Publication date: June 23, 2011Inventors: John A. Zakarian, Michael J. Haire
-
Publication number: 20110086787Abstract: A lubricating oil composition having superior storage stability and load-carrying effect is disclosed. The composition comprises four components: (1) an alkali metal borate; (2) an oil-soluble sulfur compound; (3) a trialkyl hydrogen phosphite; and (4) a mixture of greater than 50% neutralized acidic phosphates that are essentially free of monothiophosphates.Type: ApplicationFiled: December 17, 2010Publication date: April 14, 2011Inventors: John A. Zakarian, Michael J. Haire
-
Patent number: 7919440Abstract: A lubricating composition with improved storage stability comprising a major amount of an oil of lubricating viscosity, at least one alkali metal borate, at least one polysulfide mixture having at least 40% dihydrocarbyl tetrasulfide or higher sulfides, and at least one non-acidic phosphorus compound comprised of a trihydrocarbyl phosphate and a dihydrocarbyl dithiophosphate derivative is disclosed. In addition to improved storage stability, the composition has improved wear performance when the ratio of polysulfides is controlled.Type: GrantFiled: May 4, 2005Date of Patent: April 5, 2011Assignee: Chevron U.S.A. Inc.Inventors: John A. Zakarian, Michael J. Haire
-
Patent number: 7879773Abstract: A lubricating oil composition having superior storage stability and load-carrying effect is disclosed. The composition comprises four components: (1) an alkali metal borate; (2) an oil-soluble sulfur compound; (3) a trialkyl hydrogen phosphite; and (4) a mixture of greater than 50% neutralized acidic phosphates that are essentially free of monothiophosphates.Type: GrantFiled: May 4, 2005Date of Patent: February 1, 2011Assignee: Chevron U.S.A., Inc.Inventors: John A. Zakarian, Michael J. Haire
-
Patent number: 7582591Abstract: Gear lubricant with a low Brookfield Ratio, comprising: a base oil having sequential carbon atoms, low aromatics, greater than 20 wt % molecules with cycloparaffins and a high ratio of monocycloparaffins to multicycloparaffins; less than 22 wt % of a second base oil having less than 40 wt % molecules with cycloparaffins and a lower ratio of monocycloparaffins to multicycloparaffins; a pour point depressant, an EP additive; and less than 10 wt % VI improver. Gear lubricant with a low Brookfield Ratio, comprising a first base oil having low aromatics and high VI; less than 22 wt % of a second base oil with a lower VI; a pour point depressant; and an EP additive. Gear lubricant having a low Brookfield Ratio comprising: an FT derived base oil; a pour point depressing base oil blending component; and an EP additive. Processes for making gear lubricants with low Brookfield Ratios. Method for reducing Brookfield Ratio.Type: GrantFiled: April 7, 2006Date of Patent: September 1, 2009Assignee: Chevron U.S.A. Inc.Inventors: Michael J. Haire, John A. Zakarian, John M. Rosenbaum, Nancy J. Bertrand, Stephen J. Miller
-
Publication number: 20090149360Abstract: A method for forming a finished lubricant comprises selecting a target high temperature viscosity for the finished lubricant. A target high temperature viscosity for a base oil blend is selected. The target high temperature viscosity for the base oil blend is less than the target high temperature viscosity for the finished lubricant. At least two base oils from at least three viscosity grades of base oils are selected and mixed to form a base oil blend that meets the target high temperature viscosity for the base oil blend. The base oil blend is mixed with performance additive package and viscosity modifier to provide a finished lubricant that meets the target high temperature viscosity for the finished lubricant. The at least two base oils for the base oil blend having the target high temperature viscosity are selected such that less viscosity modifier is needed to meet the target high temperature viscosity of the finished lubricant.Type: ApplicationFiled: December 10, 2007Publication date: June 11, 2009Applicant: Chevron U.S.A. Inc.Inventors: John A. Zakarian, Angelito T. Tirona
-
Publication number: 20090088352Abstract: A tractor hydraulic fluid composition is prepared from an isomerized base oil which: a) the product itself, its fraction, or feed originates from or is produced at some stage by isomerization of a waxy feed from a Fischer-Tropsch process (“Fischer-Tropsch derived base oils”); or b) made from a substantially paraffinic wax feed (“waxy feed”). In one embodiment, the tractor hydraulic fluid composition is characterized as having a reduced level of viscosity modifier in an amount of 0 to 10 wt. %, and a Brookfield viscosity at ?35° C. of less than 70,000 mPa.s.Type: ApplicationFiled: October 31, 2007Publication date: April 2, 2009Inventors: John A. Zakarian, Angelito Tirona
-
Patent number: 7425524Abstract: A multigrade automotive gear lubricant comprising a base oil having a traction coefficient less than 0.021. A method for saving energy using a gear lubricant, comprising blending a multigrade gear lubricant by adding a base oil having a traction coefficient less than 0.021, and using the gear lubricant in an axle or differential. A process for making an energy saving automotive gear lubricant having a kinematic viscosity at 100° C. greater than 10 cSt. A gear lubricant comprising a FT derived base oil having a VI greater than 150 and a traction coefficient less than 0.015. A finished lubricant, comprising a FT derived base oil having a traction coefficient less than 0.015. A base oil having a traction coefficient less than 0.011 and a 50 wt % boiling point greater than 582° C.Type: GrantFiled: April 7, 2006Date of Patent: September 16, 2008Assignee: Chevron U.S.A. Inc.Inventors: Michael J. Haire, John A. Zakarian, John M. Rosenbaum, Nancy J. Bertrand, Stephen J. Miller, Trevor Miller, Vivek Palekar, Ajit Ramchandra Pradhan
-
Publication number: 20070238628Abstract: A multigrade automotive gear lubricant comprising a base oil having a traction coefficient less than 0.021. A method for saving energy using a gear lubricant, comprising blending a multigrade gear lubricant by adding a base oil having a traction coefficient less than 0.021, and using the gear lubricant in an axle or differential. A process for making an energy saving automotive gear lubricant having a kinematic viscosity at 100° C. greater than 10 cSt. A gear lubricant comprising a FT derived base oil having a VI greater than 150 and a traction coefficient less than 0.015. A finished lubricant, comprising a FT derived base oil having a traction coefficient less than 0.015. A base oil having a traction coefficient less than 0.011 and a 50 wt % boiling point greater than 582° C.Type: ApplicationFiled: April 7, 2006Publication date: October 11, 2007Inventors: Michael Haire, John Zakarian, John Rosenbaum, Nancy Bertrand, Stephen Miller, Trevor Miller, Vivek Palekar, Ajit Pradhan
-
Publication number: 20070238627Abstract: Gear lubricant with a low Brookfield Ratio, comprising: a base oil having sequential carbon atoms, low aromatics, greater than 20 wt % molecules with cycloparaffins and a high ratio of monocycloparaffins to multicycloparaffins; less than 22 wt % of a second base oil having less than 40 wt % molecules with cycloparaffins and a lower ratio of monocycloparaffins to multicycloparaffins; a pour point depressant, an EP additive; and less than 10 wt % VI improver. Gear lubricant with a low Brookfield Ratio, comprising a first base oil having low aromatics and high VI; less than 22 wt % of a second base oil with a lower VI; a pour point depressant; and an EP additive. Gear lubricant having a low Brookfield Ratio comprising: an FT derived base oil; a pour point depressing base oil blending component; and an EP additive. Processes for making gear lubricants with low Brookfield Ratios. Method for reducing Brookfield Ratio.Type: ApplicationFiled: April 7, 2006Publication date: October 11, 2007Inventors: Michael Haire, John Zakarian, John Rosenbaum, Nancy Bertrand, Stephen Miller
-
Publication number: 20060252657Abstract: A lubricating oil composition having superior storage stability and load-carrying effect is disclosed. The composition comprises four components: (1) an alkali metal borate; (2) an oil-soluble sulfur compound; (3) a trialkyl hydrogen phosphite; and (4) a mixture of greater than 50% neutralized acidic phosphates that are essentially free of monothiophosphates.Type: ApplicationFiled: May 4, 2005Publication date: November 9, 2006Inventors: John Zakarian, Michael Haire
-
Publication number: 20060252656Abstract: A lubricating composition with improved storage stability comprising a major amount of an oil of lubricating viscosity, at least one alkali metal borate, at least one polysulfide mixture having at least 40% dihydrocarbyl tetrasulfide or higher sulfides, and at least one non-acidic phosphorus compound comprised of a trihydrocarbyl phosphate and a dihydrocarbyl dithiophosphate derivative is disclosed. In addition to improved storage stability, the composition has improved wear performance when the ratio of polysulfides is controlled.Type: ApplicationFiled: May 4, 2005Publication date: November 9, 2006Inventors: John Zakarian, Michael Haire
-
Patent number: 6187725Abstract: The invention includes a process of making a lubricating composition including: contacting a heavy mineral oil feed in a hydrocracking zone with a hydrocracking catalyst at hydrocracking conditions, whereby at least a portion of the heavy mineral oil feed is cracked; recovering at least one gasoline-range fraction and one bottoms fraction from the hydrocracking zone; passing a first portion of the bottoms fraction including not more than about 67 wt. % of the bottoms fraction to a dewaxing zone; and passing a second portion of the bottoms fraction including at least about 33 wt. % of the bottoms fraction back to the fuels hydrocracker for additional processing; and where the bottoms fraction has a viscosity at 100° C. of less than about 4.Type: GrantFiled: October 15, 1998Date of Patent: February 13, 2001Assignee: Chevron U.S.A. Inc.Inventors: David C. Kramer, John A. Zakarian, Jay M. Peterson, Russell R. Krug, Jaime Lopez, Stephen K. Lee, Mark L. Sztenderowicz, Joseph M. Pudlak
-
Patent number: 6110879Abstract: The present invention provides for a lubricating composition including: a hydrocracker-derived, highly naphthenic, low viscosity index mineral oil; from about 2 wt. % to about 14 wt. % of at least one polymethacrylate polymer; and from about 2 wt. % to about 14 wt. % of a performance additive package. The hydrocracker-derived, highly naphthenic, low viscosity index mineral oil is prepared by: (1) passing a first bottoms portion including not more than about 67 wt. % of a fuels hydrocracker bottoms recycle stream to a dewaxing zone; and (2) passing a second bottoms portion including at least about 33 wt. % of the recycle stream back to the fuels hydrocracker for additional processing; and where the recycle stream has a viscosity at 100.degree. C. of less than about 4.Type: GrantFiled: October 15, 1998Date of Patent: August 29, 2000Assignee: Chevron U.S.A. Inc.Inventors: David C. Kramer, John A. Zakarian, Jay M. Peterson, Russell R. Krug, Jaime Lopez, Stephen K. Lee, Mark L. Sztenderowicz, Joseph M. Pudlak
-
Patent number: 5888946Abstract: The invention includes a tractor hydraulic fluid composition containing a major amount of a base oil mixture. The base oil mixture includes a first mineral oil having a kinematic viscosity at 100.degree. C. of at least about 4.0 centistokes and a second mineral oil having a kinematic viscosity at 100.degree. C. of at least about 7.0 centistokes. The tractor hydraulic fluid composition also contains a first polymethacrylate viscosity index improver and a second polymethacrylate viscosity index improver having a lower shear stability index than the first polymethacrylate viscosity index improver. The tractor hydraulic fluid composition has an unsheared kinematic viscosity at 100.degree. C. of at least about 9.1 centistokes, a sheared kinematic viscosity at 100.degree. C. of at least about 7.1 centistokes, and an unsheared kinematic viscosity at -40.degree. C. of not more than about 20,000 centipoise.Type: GrantFiled: December 30, 1997Date of Patent: March 30, 1999Assignee: Chevron U.S.A. Inc.Inventors: John A. Zakarian, Gene E. Robinson
-
Patent number: 4436614Abstract: A desulfurizing and dewaxing process which can be performed in a single reaction vessel is disclosed.The desired lowering of oil partial pressure for dewaxing zone is accomplished by adding diluent gas to the HDS-zone effluent, thus obviating the need for other means to maintain differing oil partial pressures between serial catalyst zones.Type: GrantFiled: October 8, 1982Date of Patent: March 13, 1984Assignee: Chevron Research CompanyInventors: Hazel C. Olbrich, Dennis J. O'Rear, John A. Zakarian
-
Patent number: 4383913Abstract: A process for producing lubricating oil base stock from a feedstock having a VI of less than 80 to a base stock with a VI of at least 90 with the same boiling range as the feedstock. The feedstock is contacted with a zeolite-containing hydrocracking catalyst in a first zone and an amorphous hydrocracking catalyst in the second zone. Between 25 percent and 75 percent of all hydroconversion takes place in the first zone.Type: GrantFiled: October 9, 1981Date of Patent: May 17, 1983Assignee: Chevron Research CompanyInventors: Bruce E. Powell, Jerome F. Mayer, John A. Zakarian
-
Patent number: RE44475Abstract: A lubricating composition with improved storage stability comprising a major amount of an oil of lubricating viscosity, at least one alkali metal borate, at least one polysulfide mixture having at least 40% dihydrocarbyl tetrasulfide or higher sulfides, and at least one non-acidic phosphorus compound comprised of a trihydrocarbyl phosphate and a dihydrocarbyl dithiophosphate derivative is disclosed. In addition to improved storage stability, the composition has improved wear performance when the ratio of polysulfides is controlled.Type: GrantFiled: February 24, 2012Date of Patent: September 3, 2013Assignee: Chevron U.S.A. Inc.Inventors: John A. Zakarian, Michael J. Haire