Patents by Inventor Mark S. Greenfield

Mark S. Greenfield 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: 10253410
    Abstract: A coated cutting insert includes a substrate that is either a ceramic substrate or polycrystalline cubic boron nitride-containing substrate and has a substrate surface.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: April 9, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Vineet Kumar, Ronald M. Penich, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Patent number: 9903018
    Abstract: A coated cutting insert and a method for making the same. The coated cutting insert has a substrate with a substrate surface. There is a backing coating scheme on the substrate surface, and a TiAl2O3 coating layer wherein the TiAl2O3 coating layer is deposited using chemical vapor deposition from a gaseous composition including AiCl3, H2, TiCl4, CO2 and HCl.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: February 27, 2018
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Rodrigo A. Cooper, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20170218511
    Abstract: A coated cutting insert includes a substrate that is either a ceramic substrate or polycrystalline cubic boron nitride-containing substrate and has a substrate surface.
    Type: Application
    Filed: April 13, 2017
    Publication date: August 3, 2017
    Inventors: Vineet KUMAR, Ronald M. PENICH, Peter R. LEICHT, Mark S. GREENFIELD, Yixiong LIU
  • Patent number: 9656873
    Abstract: In one aspect, methods of purifying WC compositions are described herein. A method of purifying a WC composition comprises contacting the WC composition with an electrolyte solution comprising a cationic metal oxidant and oxidizing one or more metal impurities of the WC composition with the cationic metal oxidant to solubilize the one or more metal impurities in the electrolyte solution.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: May 23, 2017
    Assignee: KENNAMETAL INC.
    Inventors: Pankaj Kumar Mehrotra, Mark S. Greenfield
  • Patent number: 9650713
    Abstract: A coated cutting insert includes a substrate that is either a ceramic substrate or polycrystalline cubic boron nitride-containing substrate and has a substrate surface.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: May 16, 2017
    Assignee: KENNAMTETAL INC.
    Inventors: Vineet Kumar, Ronald M. Penich, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20160265106
    Abstract: A coated cutting insert includes a substrate that is either a ceramic substrate or polycrystalline cubic boron nitride-containing substrate and has a substrate surface.
    Type: Application
    Filed: March 12, 2015
    Publication date: September 15, 2016
    Inventors: Vineet Kumar, Ronald M. Penich, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20160194754
    Abstract: A coated cutting insert and a method for making the same. The coated cutting insert has a substrate with a substrate surface. There is a backing coating scheme on the substrate surface, and a TiAl2O3 coating layer wherein the TiAl2O3 coating layer is deposited using chemical vapor deposition from a gaseous composition including AiCl3, H2, TiCl4, CO2 and HCl.
    Type: Application
    Filed: March 17, 2016
    Publication date: July 7, 2016
    Inventors: Zhenyu Liu, Rodrigo A. Cooper, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Patent number: 9371580
    Abstract: A coated cutting insert and a method for making the same. The coated cutting insert has a substrate with a substrate surface. There is a backing coating scheme on the substrate surface, and a TiAl2O3 coating layer wherein the TiAl2O3 coating layer is deposited using chemical vapor deposition from a gaseous composition including AlCl3, H2, TiCl4, CO2 and HCl.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: June 21, 2016
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Rodrigo A. Cooper, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Patent number: 9365925
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool described herein comprises a substrate and a coating adhered to the substrate, the coating having a multilayer structure including a plurality of structural units each comprising a bonding layer and an adjacent alumina layer, the alumina layer having a thickness of less than 0.5 ?m and the bonding layer having a thickness less than 1 ?m, the bonding layer comprising TiCN and TiAlOC.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: June 14, 2016
    Assignee: KENNAMETAL INC.
    Inventors: Peter Rudolf Leicht, Zhenyu Liu, Mark S Greenfield, Yixiong Liu
  • Patent number: 9181621
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising a polycrystalline layer of TiZrAl2O3.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: November 10, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Mark S. Greenfield, Yixiong Liu
  • Patent number: 9181620
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising at least one Zr doped layer deposited by chemical vapor deposition comprising ZrAl2O3.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: November 10, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Karl Heinz Wendt, Volkmar Sottke, Peter Rudolf Leicht, Yixiong Liu, Mark S. Greenfield, Hartmut Westphal
  • Publication number: 20150139872
    Abstract: In one aspect, methods of purifying WC compositions are described herein. A method of purifying a WC composition comprises contacting the WC composition with an electrolyte solution comprising a cationic metal oxidant and oxidizing one or more metal impurities of the WC composition with the cationic metal oxidant to solubilize the one or more metal impurities in the electrolyte solution.
    Type: Application
    Filed: November 20, 2014
    Publication date: May 21, 2015
    Inventors: Pankaj Kumar MEHROTRA, Mark S. Greenfield
  • Publication number: 20140291036
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool described herein comprises a substrate and a coating adhered to the substrate, the coating having a multilayer structure including a plurality of structural units each comprising a bonding layer and an adjacent alumina layer, the alumina layer having a thickness of less than 0.5 ?m and the bonding layer having a thickness less than 1 ?m, the bonding layer comprising TiCN and TiAlOC.
    Type: Application
    Filed: March 27, 2014
    Publication date: October 2, 2014
    Applicant: Kennametal Inc.
    Inventors: Peter Rudolf Leicht, Zhenyu Liu, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20140287229
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising at least one Zr doped layer deposited by chemical vapor deposition comprising ZrAl2O3.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: Kennametal Inc.
    Inventors: Karl Heinz Wendt, Volkmar Sottke, Peter Rudolf Leicht, Yixiong Liu, Mark S. Greenfield, Hartmut Westphal
  • Publication number: 20140287228
    Abstract: A coated cutting insert and a method for making the same. The coated cutting insert has a substrate with a substrate surface. There is a backing coating scheme on the substrate surface, and a TiAl2O3 coating layer wherein the TiAl2O3 coating layer is deposited using chemical vapor deposition from a gaseous composition including AlCl3, H2, TiCl4, CO2 and HCl.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 25, 2014
    Applicant: Kennametal Inc.
    Inventors: Zhenyu Liu, Rodrigo A. Cooper, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20140287199
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising a polycrystalline layer of TiZrAl2O3.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: Kennametal Inc.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Mark S. Greenfield, Yixiong Liu
  • Patent number: 8828492
    Abstract: A method for making a coated article wherein the method includes the following steps: providing a substrate; and depositing an aluminum oxynitride coating layer from a gaseous mixture. The gaseous mixture contains the following components: 30.0-65.0 volume percent nitrogen, 0.7-1.3 volume percent aluminum tri-chloride; 1.0-2.0 volume percent ammonia, 0.1-1.5 carbon dioxide, 1.5-4.5 volume percent hydrogen chloride, optional components of carbon monoxide and/or argon, and hydrogen as the balance.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: September 9, 2014
    Assignee: Kennametal Inc.
    Inventors: Volkmar Sottke, Hartmut Westphal, Hendrikus Van Den Berg, Zhigang Ban, Yixiong Liu, Mark S. Greenfield
  • Publication number: 20130302521
    Abstract: A coated article such as a coated cutting tool or coated wear part, which includes a substrate and a coating scheme on the substrate. The coating scheme has a titanium-containing coating layer, and an aluminum oxynitride coating layer on the titanium-containing coating layer. The aluminum oxynitride includes a mixture of phases having a hexagonal aluminum nitride type structure (space group: P63mc), a cubic aluminum nitride type structure (space group: Fm-3m), and optionally amorphous structure. The aluminum oxynitride coating layer has a composition of aluminum in an amount between about 20 atomic percent and about 50 atomic percent, nitrogen in an amount between about 40 atomic percent and about 70 atomic percent, and oxygen in an amount between about 1 atomic percent and about 20 atomic percent.
    Type: Application
    Filed: June 3, 2013
    Publication date: November 14, 2013
    Applicant: Kennametal Inc.
    Inventors: Volkmar Sottke, Hartmut Westphal, Hendrikus Van Den Berg, Zhigang Ban, Yixiong Liu, Mark S. Greenfield
  • Patent number: 8574728
    Abstract: A coated article such as a coated cutting tool or coated wear part, which includes a substrate and a coating scheme on the substrate. The coating scheme has a titanium-containing coating layer, and an aluminum oxynitride coating layer on the titanium-containing coating layer. The aluminum oxynitride includes a mixture of phases having a hexagonal aluminum nitride type structure (space group: P63mc), a cubic aluminum nitride type structure (space group: Fm-3m), and optionally amorphous structure. The aluminum oxynitride coating layer has a composition of aluminum in an amount between about 20 atomic percent and about 50 atomic percent, nitrogen in an amount between about 40 atomic percent and about 70 atomic percent, and oxygen in an amount between about 1 atomic percent and about 20 atomic percent.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: November 5, 2013
    Assignee: Kennametal Inc.
    Inventors: Volkmar Sottke, Hartmut Westphal, Hendrkus Van Den Berg, Zhigang Ban, Yixiong Liu, Mark S. Greenfield
  • Patent number: 8568866
    Abstract: A wear resistant multilayer nitride hard coating for substrates. The hard coating includes a first layer of titanium aluminum nitride and a second layer comprising a plurality of sublayer groups. Each sublayer group includes a first sublayer of titanium silicon nitride and a second sublayer of titanium aluminum nitride. The composition of the titanium aluminum nitride, both in the first layer and in the sublayer groups, is (TixAl1-x)N, wherein 0.4?x?0.6. The composition of the titanium silicon nitride sublayers is (TiySi1-y)N, wherein 0.85?y?0.98, and all of the silicon is in solid solution in the titanium silicon nitride such that no silicon phase or silicon nitride phase exists in this sublayer. The combined amount of aluminum and silicon present in the sublayer groups being narrowly controlled such that the sum of x and y is in the range of 1.38 to 1.46.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: October 29, 2013
    Assignee: Kennametal Inc.
    Inventors: Wangyang Ni, Yixiong Liu, Mark S Greenfield, Ronald M Penich