Patents by Inventor Steven Lee Stafford
Steven Lee Stafford 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: 20230407002Abstract: A shaped article comprising a molded component configured to receive a terpene containing oil composition, said molded component formed of a copolyester composition having high chemical resistance to terpene oil and having a Tg of at least 95° C.Type: ApplicationFiled: November 9, 2021Publication date: December 21, 2023Applicant: Eastman Chemical CompanyInventors: Steven Lee Stafford, Bryan Steven Bishop, Kathleen Jean White, Mason Scott Myers
-
Publication number: 20180154621Abstract: The present disclosure relates to extrusion coating systems, extrusion coated substrates, and processes for making the same. In some aspects, extrusion coating systems as described herein may include an at least partially insulated outlet wall, which may facilitate production of coated substrates exhibiting a very desirable surface texture and appearance. Coated substrates of the present invention may be utilized in a variety of end applications, including, but not limited to, interior and exterior construction materials for homes, buildings, and furniture.Type: ApplicationFiled: January 31, 2018Publication date: June 7, 2018Applicant: Eastman Chemical CompanyInventors: Tony Wayne Helton, Steven Lee Stafford, Aaron David Grills, Subramanian Easwaran Iyer
-
Publication number: 20180104930Abstract: This invention relates to clear, semicrystalline, strain induced crystallized polyester films heat laminated onto metal substrates. The films contain at least one polyester which comprises at least of one or more monomers selected from 1,4-cyclohexanedimethanol or 2,2,4,4-tetramethyl-1,3-cyclobutanediol. The articles of the present invention exhibit enhanced mechanical properties useful for the fabrication of thin metal articles such as metal cans.Type: ApplicationFiled: October 13, 2017Publication date: April 19, 2018Applicant: Eastman Chemical CompanyInventors: Xue Guang Steven Lin, Fan Liang Meng, Zhong Zhong Johnny Qian, Yu-Hwey Chuang, Emmett Dudley Crawford, Michael Eugene Donelson, Steven Lee Stafford, James Carl Williams
-
Patent number: 9919503Abstract: The present disclosure relates to extrusion coating systems, extrusion coated substrates, and processes for making the same. In some aspects, extrusion coating systems as described herein may include an at least partially insulated outlet wall, which may facilitate production of coated substrates exhibiting a very desirable surface texture and appearance. Coated substrates of the present invention may be utilized in a variety of end applications, including, but not limited to, interior and exterior construction materials for homes, buildings, and furniture.Type: GrantFiled: September 16, 2014Date of Patent: March 20, 2018Assignee: Eastman Chemical CompanyInventors: Tony Wayne Helton, Steven Lee Stafford, Aaron Grills, Subramanian Easwaran Iyer
-
Patent number: 9920526Abstract: Structural systems having coated structural members with enhanced durability are provided, along with methods of making and using the same. Structural members including at least one coating material applied to a substrate that comprises at least one protrusion may exhibit increased strength and/or durability and may be less likely fail during use. For example, structural members as described herein exhibit an improved resistance to cracking when a force is applied to the protrusion. Structural systems according to embodiments of the present invention can be suitable for use in a variety of applications, including in ready-to-assemble furniture or cabinetry applications or as building and construction materials such as wall board, flooring, trim, and the like.Type: GrantFiled: September 25, 2014Date of Patent: March 20, 2018Assignee: Eastman Chemical CompanyInventors: Chad Alan Frazier, Subramanian Easwaran Iyer, Steven Lee Stafford
-
Publication number: 20150107175Abstract: Structural systems having coated structural members with enhanced durability are provided, along with methods of making and using the same. Structural members including at least one coating material applied to a substrate that comprises at least one protrusion may exhibit increased strength and/or durability and may be less likely fail during use. For example, structural members as described herein exhibit an improved resistance to cracking when a force is applied to the protrusion. Structural systems according to embodiments of the present invention can be suitable for use in a variety of applications, including in ready-to-assemble furniture or cabinetry applications or as building and construction materials such as wall board, flooring, trim, and the like.Type: ApplicationFiled: September 25, 2014Publication date: April 23, 2015Applicant: Eastman Chemical CompanyInventors: Chad Alan Frazier, Subramanian Easwaran Iyer, Steven Lee Stafford
-
Publication number: 20150004349Abstract: The present disclosure relates to extrusion coating systems, extrusion coated substrates, and processes for making the same. In some aspects, extrusion coating systems as described herein may include an at least partially insulated outlet wall, which may facilitate production of coated substrates exhibiting a very desirable surface texture and appearance. Coated substrates of the present invention may be utilized in a variety of end applications, including, but not limited to, interior and exterior construction materials for homes, buildings, and furniture.Type: ApplicationFiled: September 16, 2014Publication date: January 1, 2015Applicant: EASTMAN CHEMICAL COMPANYInventors: Tony Wayne Helton, Steven Lee Stafford, Aaron Grills, Subramanian Easwaran Iyer
-
Patent number: 8865261Abstract: The present disclosure relates to extrusion coating systems, extrusion coated substrates, and processes for making the same. In some aspects, extrusion coating systems as described herein may include an at least partially insulated outlet wall, which may facilitate production of coated substrates exhibiting a very desirable surface texture and appearance. Coated substrates of the present invention may be utilized in a variety of end applications, including, but not limited to, interior and exterior construction materials for homes, buildings, and furniture.Type: GrantFiled: December 6, 2012Date of Patent: October 21, 2014Assignee: Eastman Chemical CompanyInventors: Tony Wayne Helton, Steven Lee Stafford, Aaron Grills, Subramanian Easwaran Iyer
-
Aluminum/alkyline or alkali/titanium containing polyesters having improved reheat, color and clarity
Patent number: 8791187Abstract: A polyester composition containing: a) aluminum atoms; and b) alkaline earth atoms or alkali metal atoms or alkali compound residues such as lithium atoms; and c) particles comprising titanium, zirconium, vanadium, niobium, hafnium, tantalum, chromium, tungsten, molybdenum, iron, or nickel atoms or combinations thereof, where the particles improve the reheat rate of the polyester composition. The polyester polymer compositions may also contain phosphorus catalyst deactivators/stabilizers. The polyester compositions and the articles made from the compositions such as bottle preforms and stretch blow molded bottles have improved reheat rate while maintaining low haze, high L*, a b* below 3, and have low levels of acetaldehyde. In the process for making the polyester polymer, the polymer melt is polycondensed in the presence of a) and b), with the particles c) added in a melt phase process or added to the polymer in an injection molding machine or extruder.Type: GrantFiled: May 31, 2011Date of Patent: July 29, 2014Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Donna Rice Quillen, Rodney Scott Armentrout, Mary Therese Jernigan, Steven Lee Stafford, Zhiyong Xia -
Publication number: 20140162015Abstract: The present disclosure relates to extrusion coating systems, extrusion coated substrates, and processes for making the same. In some aspects, extrusion coating systems as described herein may include an at least partially insulated outlet wall, which may facilitate production of coated substrates exhibiting a very desirable surface texture and appearance. Coated substrates of the present invention may be utilized in a variety of end applications, including, but not limited to, interior and exterior construction materials for homes, buildings, and furniture.Type: ApplicationFiled: December 6, 2012Publication date: June 12, 2014Applicant: Eastman Chemical CompanyInventors: Tony Wayne Helton, Steven Lee Stafford, Aaron Grills, Subramanian Easwaran Iyer
-
Aluminum/alkaline or alkali/titanium containing polyesters having improved reheat, color and clarity
Patent number: 8431202Abstract: A polyester composition containing: a) aluminum atoms; and b) alkaline earth atoms or alkali metal atoms or alkali compound residues such as lithium atoms; and c) particles comprising titanium, zirconium, vanadium, niobium, hafnium, tantalum, chromium, tungsten, molybdenum, iron, or nickel atoms or combinations thereof, where the particles improve the reheat rate of the polyester composition. The polyester polymer compositions may also contain phosphorus catalyst deactivators/stabilizers. The polyester compositions and the articles made from the compositions such as bottle preforms and stretch blow molded bottles have improved reheat rate while maintaining low haze, high L*, a b* below 3, and have low levels of acetaldehyde. In the process for making the polyester polymer, the polymer melt is polycondensed in the presence of a) and b), with the particles c) added in a melt phase process or added to the polymer in an injection molding machine or extruder.Type: GrantFiled: September 16, 2005Date of Patent: April 30, 2013Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Donna Rice Quillen, Rodney Scott Armentrout, Mary Therese Jernigan, Steven Lee Stafford, Zhiyong Xia -
Patent number: 8247522Abstract: A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing.Type: GrantFiled: June 17, 2011Date of Patent: August 21, 2012Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Bruce Roger DeBruin, Tommy Ray Maddox, II, John Alan Wabshall, Jr., Steven Lee Stafford, Stephen Weinhold, Robert Noah Estep, Mary Therese Jernigan, Steven Paul Bellner, Alan George Wonders, John Guy Franjione
-
ALUMINUM/ALKYLINE OR ALKALI/TITANIUM CONTAINING POLYESTERS HAVING IMPROVED REHEAT, COLOR AND CLARITY
Publication number: 20110281049Abstract: A polyester composition containing: a) aluminum atoms; and b) alkaline earth atoms or alkali metal atoms or alkali compound residues such as lithium atoms; and c) particles comprising titanium, zirconium, vanadium, niobium, hafnium, tantalum, chromium, tungsten, molybdenum, iron, or nickel atoms or combinations thereof, where the particles improve the reheat rate of the polyester composition. The polyester polymer compositions may also contain phosphorus catalyst deactivators/stabilizers. The polyester compositions and the articles made from the compositions such as bottle preforms and stretch blow molded bottles have improved reheat rate while maintaining low haze, high L*, a b* below 3, and have low levels of acetaldehyde. In the process for making the polyester polymer, the polymer melt is polycondensed in the presence of a) and b), with the particles c) added in a melt phase process or added to the polymer in an injection molding machine or extruder.Type: ApplicationFiled: May 31, 2011Publication date: November 17, 2011Applicant: GRUPO PETROTEMEX, S.A. DE C.V.Inventors: Donna Rice Quillen, Rodney Scott Armentrout, Mary Therese Jernigan, Steven Lee Stafford, Zhiyong Xia -
Patent number: 8057726Abstract: Disclosed is a process for a melt processing a polyethylene terephthalate resin characterized by one or more of the following. The polyester particles may have at least two melting peaks wherein one of the at least two melting peaks is a low peak melting point with a range from 140° C. to 220° C., or from 140° C. to 230° C., and having a melting endothermic area of at least the absolute value of 1 J/g. The polyester particles may have one or more melting peaks at least one of which when measured on a DSC first heating scan has a heating curve departing from a baseline in the endothermic direction at a temperature of less than or equal to 200° C. The polyester particles may have an It.V. at their surface which is less than 0.25 dL/g higher than the It.V. at their center. The polyester particles may have not been solid stated. The melt processing device comprises a screw with a total length, L, a feed zone length in the range from 0.16L and 0.45L, a taper angle, ?, in the range from 0.5 degrees and 5.Type: GrantFiled: May 26, 2009Date of Patent: November 15, 2011Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Marcus David Shelby, Michael Eugene Donelson, Frederick Leslie Colhoun, Steven Lee Stafford, Mark Edward Stewart, Stephen Weinhold, Edward Lewis Boochard, Robert Noah Estep
-
Patent number: 8039578Abstract: A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing. In one embodiment, the process comprises (a) forming polyester polymer particles from a polyester polymer melt; (b) quenching at least a portion of the particles, (c) drying at least a portion of the particles, (d) crystallizing at least a portion of the particles, (e) annealing at least a portion of the particles. At all points during and between steps (b) through (e), the average bulk temperature of the particles is maintained above 165° C.Type: GrantFiled: October 21, 2010Date of Patent: October 18, 2011Assignee: Eastman Chemical CompanyInventors: Bruce Roger DeBruin, Tommy Ray Maddox, II, John Alan Wabshall, Jr., Steven Lee Stafford, Stephen Weinhold, Robert Noah Estep, Mary Therese Jernigan, Steven Paul Bellner, Alan George Wonders
-
Patent number: 8039577Abstract: Polyester compositions are disclosed that include polyester polymers or copolymers having incorporated therein titanium nitride particles that provide one or more of the following advantages: improving the reheat properties of the compositions, improving the color of the compositions through reduced yellowness, and improving the UV-blocking properties of the compositions. Processes for making such compositions are also disclosed. The titanium nitride particles may be incorporated in the polyester by melt compounding, or may be added at any stage of the polymerization, such as during the melt-phase of the polymerization. A range of particle sizes may be used, as well as a range of particle size distributions. The polyester compositions are suitable for use in packaging made from processes in which a reheat step is desirable, or decreased yellowness is desired, or increased resistance to the effects of ultraviolet light is desired, or any combination of the foregoing.Type: GrantFiled: March 3, 2008Date of Patent: October 18, 2011Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Zhiyong Xia, Steven Lee Stafford, Susan Sims, Frederick Leslie Colhoun
-
Publication number: 20110251340Abstract: A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing.Type: ApplicationFiled: June 17, 2011Publication date: October 13, 2011Applicant: GRUPO PETROTEMEX, S.A. DE C.V.Inventors: Bruce Roger DEBRUIN, Tommy Ray Maddox, II, John Alan Wabshall, JR., Steven Lee Stafford, Stephen Weinhold, Robert Noah Estep, Mary Therese Jernigan, Steven Paul Bellner, Alan George Wonders, John Guy Franjione
-
Patent number: 7989577Abstract: A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing.Type: GrantFiled: November 30, 2010Date of Patent: August 2, 2011Assignee: Grupo Petromex, S.A. De C.V.Inventors: Bruce Roger DeBruin, Tommy Ray Maddox, II, John Alan Wabshall, Jr., Steven Lee Stafford, Stephen Weinhold, Robert Noah Estep, Mary Therese Jernigan, Steven Paul Bellner, Alan George Wonders, John Guy Franjione
-
Publication number: 20110070445Abstract: A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing.Type: ApplicationFiled: November 30, 2010Publication date: March 24, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Bruce Roger DeBruin, Tommy Ray Maddox, II, John Alan Wabshall, JR., Steven Lee Stafford, Stephen Weinhold, Robert Noah Estep, Mary Therese Jernigan, Steven Paul Bellner, Alan George Wonders, John Guy Franjione
-
Publication number: 20110034664Abstract: A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing.Type: ApplicationFiled: October 21, 2010Publication date: February 10, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Bruce Roger DeBruin, Tommy Ray Maddox, II, John Alan Wabshall, JR., Steven Lee Stafford, Stephen Weinhold, Robert Noah Estep, Mary Therese Jernigan, Steven Paul Bellner, Alan George Wonders