Patents by Inventor Ulf Kivisakk

Ulf Kivisakk 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: 11603585
    Abstract: The present disclosure relates to an austenitic stainless alloy comprising in weight % (wt %): C less than 0.03; Si less than 1.0; Mn less than or equal to 1.2; Cr 26.0 to 30.0; Ni 29.0 to 37.0; Mo 6.1 to 7.1 or (Mo+W/2) 6.1 to 7.1; N 0.25 to 0.36; P less than or equal to 0.04; S less than or equal to 0.03; Cu less than or equal to 0.4; balance Fe and unavoidable impurities and to the use thereof and to products made thereof. Thus, the austenitic stainless alloy comprises a low content of manganese in combination with a high content of nitrogen. The present disclosure also relates to the use of said austenitic stainless alloy, especially in highly corrosive environments and to products made of thereof.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: March 14, 2023
    Assignee: Sandvik Intellectual Property AB
    Inventors: Ulf Kivisakk, Karin Antonsson, Peter Stenvall
  • Patent number: 11090627
    Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C ?0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10;? Mo 0-4.0; N 0.30-0.55;?? Cu 0-0.8; W 0-3.0; S ?0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: August 17, 2021
    Assignee: Stamicarbon B.V.
    Inventors: Linn Larsson, Daniel Gullberg, Ulf Kivisäkk, Martin Östlund, Alexander Aleida Antonius Scheerder
  • Publication number: 20210198776
    Abstract: The present disclosure relates to an austenitic stainless alloy comprising in weight % (wt %): C less than 0.03; Si less than 1.0; Mn less than or equal to 1.2; Cr 26.0 to 30.0; Ni 29.0 to 37.0; Mo 6.1 to 7.1 or (Mo+W/2) 6.1 to 7.1; N 0.25 to 0.36; P less than or equal to 0.04; S less than or equal to 0.03; Cu less than or equal to 0.4; balance Fe and unavoidable impurities and to the use thereof and to products made thereof. Thus, the austenitic stainless alloy comprises a low content of manganese in combination with a high content of nitrogen. The present disclosure also relates to the use of said austenitic stainless alloy, especially in highly corrosive environments and to products made of thereof.
    Type: Application
    Filed: March 8, 2021
    Publication date: July 1, 2021
    Applicant: Sandvik Intellectual Property AB
    Inventors: Ulf KIVISAKK, Karin ANTONSSON, Peter STENVALL
  • Patent number: 11035028
    Abstract: The present disclosure relates to a powder of an austenitic alloy and a HIP:ed object manufactured thereof and a process for the manufacturing the HIP:ed object and its use in corrosive environments.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: June 15, 2021
    Assignee: Sandvik Intellectual Property AB
    Inventors: Hans Söderberg, Thomas Blomfeldt, Ulf Kivisäkk, Lars-Olov Nordberg, Zhiliang Zhou
  • Patent number: 10968504
    Abstract: The present disclosure relates to an austenitic stainless alloy including in weight % (wt %): C less than 0.03; Si less than 1.0; Mn less than or equal to 1.2; Cr 26.0 to 30.0; Ni 29.0 to 37.0; Mo 6.1 to 7.1 or (Mo+W/2) 6.1 to 7.1; N 0.25 to 0.36; P less than or equal to 0.04 S less than or equal to 0.03; Cu less than or equal to 0.4; and a balance of Fe and unavoidable impurities. The austenitic stainless alloy has a low content of manganese in combination with a high content of nitrogen. The present disclosure also relates to the use of the austenitic stainless alloy, especially in highly corrosive environments and to products made of thereof.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: April 6, 2021
    Assignee: Sandvik Intellectual Property AB
    Inventors: Ulf Kivisakk, Karin Antonsson, Peter Stenvall
  • Publication number: 20210079499
    Abstract: The invention relates to an austenitic alloy comprising the following elements in weight %: C ?0.03; Si ?1.0; 5 Mn ?1.5; S ?0.03; P ?0.03; Cr 25.0 to 33.0; Ni 42.0 to 52.0; 10 Mo 6.0 to 9.0; N 0.07-0.11; Cu ?0.4; Balance Fe and unavoidable impurities; and characterized in that the austenitic alloy fulfills the following condition: ENi>1.864*ECr?19.92 wherein ECr=[wt % Cr]+[wt % Mo]+1.5*[wt % Si] and ENi=[wt % Ni]+30*[wt % C]+30*[wt % N]+0.5*[wt % Mn]+0.5*[wt % Cu]. The invention also relates to a manufacturing method and an object comprising said alloy. The alloy and objects made thereof have less than 0.3% intermetallic phases after solidification.
    Type: Application
    Filed: May 23, 2019
    Publication date: March 18, 2021
    Applicant: AB Sandvik Materials Technology
    Inventors: Karin ANTONSSON, Ulf KIVISÄKK
  • Publication number: 20200254419
    Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C ?0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10;? Mo 0-4.0; N 0.30-0.55;?? Cu 0-0.8; W 0-3.0; S ?0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.
    Type: Application
    Filed: April 24, 2020
    Publication date: August 13, 2020
    Applicant: Stamicarbon B.V.
    Inventors: Linn LARSSON, Daniel GULLBERG, Ulf KIVISÄKK, Martin ÖSTLUND, Alexander Aleida Antonius SCHEERDER
  • Patent number: 10710047
    Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C ?0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10;? Mo 0-4.0; N 0.30-0.55:? Cu 0-0.8; W 0-3.0; S ?0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: July 14, 2020
    Assignee: Stamicarbon B.V.
    Inventors: Linn Larsson, Daniel Gullberg, Ulf Kivisäkk, Martin Östlund, Alexander Aleida Antonius Scheerder
  • Publication number: 20200024711
    Abstract: The present disclosure relates to a powder of an austenitic alloy and a HIP:ed object manufactured thereof and a process for the manufacturing the HIP:ed object and its use in corrosive environments.
    Type: Application
    Filed: March 21, 2018
    Publication date: January 23, 2020
    Applicant: SANDVIK INTELLECTUAL PROPERTY AB
    Inventors: Hans SÖDERBERG, Thomas BLOMFELDT, Ulf KIVISÄKK, Lars-Olov NORDBERG, Zhiliang ZHOU
  • Publication number: 20190376156
    Abstract: The present disclosure relates to the use of a solution-annealed object comprising a duplex stainless steel, having the following composition in weight % (wt %): C less than or equal to 0.03; Si less than or equal to 0.5; Mn less than or equal to 1.0; Ni 5.0 to 7.0; Cr 22.0 to 26.0; Mo 2.5 to 4.5; N 0.1 to 0.2; P less than or equal to 0.03; S less than or equal to 0.03; Cu less than or equal to 0.3; Al less than or equal to 0.10; the balance being Fe and inevitable impurities; wherein the duplex stainless steel fulfills the equation of Cr+50N?35; and wherein the duplex stainless steel has a ferrite phase content in the range of from 40% to 60% by volume and an austenite phase content in the range of 40 to 60% by volume; in sea water applications.
    Type: Application
    Filed: December 18, 2017
    Publication date: December 12, 2019
    Applicant: SANDVIK INTELLECTUAL PROPERTY AB
    Inventor: Ulf KIVISÄKK
  • Publication number: 20180312948
    Abstract: The present disclosure relates to an austenitic stainless alloy comprising in weight % (wt %): C less than 0.03; Si less than 1.0; Mn less than or equal to 1.2; Cr 26.0 to 30.0; Ni 29.0 to 37.0; Mo 6.1 to 7.1 or (Mo+W/2) 6.1 to 7.1; N 0.25 to 0.36; P less than or equal to 0.04; S less than or equal to 0.03; Cu less than or equal to 0.4; balance Fe and unavoidable impurities and to the use thereof and to products made thereof. Thus, the austenitic stainless alloy comprises a low content of manganese in combination with a high content of nitrogen. The present disclosure also relates to the use of said austenitic stainless alloy, especially in highly corrosive environments and to products made of thereof.
    Type: Application
    Filed: October 19, 2016
    Publication date: November 1, 2018
    Applicant: SANDVIK INTELLECTUAL PROPERTY AB
    Inventors: Ulf KIVISAKK, Karin ANTONSSON, Peter STENVALL
  • Publication number: 20180304224
    Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C ?0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10;? Mo 0-4.0; N 0.30-0.55:? Cu 0-0.8; W 0-3.0; S ?0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.
    Type: Application
    Filed: June 29, 2018
    Publication date: October 25, 2018
    Applicant: Stamicarbon B.V.
    Inventors: Linn LARSSON, Daniel GULLBERG, Ulf KIVISÄKK, Martin ÖSTLUND, Alexander Aleida Antonius SCHEERDER
  • Patent number: 10046297
    Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C 0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10; Mo 0-4.0; N 0.30-0.55; Cu 0-0.8; W 0-3.0; S 0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: August 14, 2018
    Assignee: Stamicarbon B.V.
    Inventors: Linn Larsson, Daniel Gullberg, Ulf Kivisäkk, Martin Östlund, Alexander Aleida Antonius Scheerder
  • Publication number: 20160325261
    Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C 0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10; Mo 0-4.0; N 0.30-0.55; Cu 0-0.8; W 0-3.0; S 0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.
    Type: Application
    Filed: December 23, 2014
    Publication date: November 10, 2016
    Applicant: Stamicarbon B.V.
    Inventors: Linn LARSSON, Daniel GULLBERG, Ulf KIVISÄKK, Martin ÖSTLUND, Alexander Aleida Antonius SCHEERDER
  • Publication number: 20160319405
    Abstract: The elementary composition of a Hot Isostatic Pressed ferritic-austenitic steel alloy includes, in percentages by weight: C 0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10; Mo 0-4.0; N 0.30-0.55; Cu 0-0.8; W 0-3.0; S 0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. Objects of the alloy can be useful in making components for a urea production plant that require processing such as machining or drilling, for example, in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.
    Type: Application
    Filed: December 23, 2014
    Publication date: November 3, 2016
    Inventors: Linn LARSSON, Daniel GULLBERG, Ulf KIVISÄKK, Martin ÖSTLUND, Alexander Aleida Antonius SCHEERDER
  • Publication number: 20100084121
    Abstract: The present invention relates to a plate of a plate heat exchanger, said plate comprising a material which constitutes a part of said plate with a surface made of this material positioned to be in direct contact with a chloride-containing cooling liquid, such as sea water, in which the material is a duplex stainless steel alloy containing in weight-%: C max 0.06%, Si max 1.5%, Mn 0-3.0%, Cr 23.0-32.0%, Ni 4.9-10.0%, Mo 3.0-8.0%, N 0.15-0.5%, B 0.-0.010%, S max 0.030%, Co 0-3.5%, W 0-3.0%, Cu 0-2.0%, Ru 0-0.3%, Al 0-0.2%, Ca 0-0.010% balance Fe and normal occurring impurities, wherein the ferrite content is 35-70 volume-%.
    Type: Application
    Filed: December 13, 2007
    Publication date: April 8, 2010
    Applicant: Sandvik Intellectual Property AB
    Inventors: Ulf Kivisäkk, Kenneth Göransson
  • Patent number: 7081173
    Abstract: A super-austenitic stainless steel alloy with a composition, balanced in such a way that products made from the alloy fulfill high requirements on a combination of high corrosion resistance, especially in inorganic and organic acids and mixtures thereof, good general corrosion resistance, good structure stability as well as improved mechanical properties in combination with good workability, in particular in tubes, especially seamless tubes and seam welded tubes for application in these environments and with following composition, in weight-percent: Cr 23.0–30.0 Ni 25.0–35.0 Mo ?2.0–6.0 Mn ?1.0–6.0 N ??0–0.4 C up to 0.05 Si up to 1.0 S up to 0.02 Cu up to 3.0 W ??0–6.0 up to 2.0 of one or more element of the group Mg, Ce, Ca, B, La, Pr, Zr, Ti, Nd, and the balance being Fe and normally occurring impurities and steel making additions.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: July 25, 2006
    Assignee: Sandvik Intellectual Property AB
    Inventors: Babak Bahar, Johan Frodigh, Pasi Kangas, Ulf Kivisäkk
  • Publication number: 20030143105
    Abstract: A super-austenitic stainless steel alloy with a composition, balanced in such a way that products made from the alloy fulfill high requirements on a combination of high corrosion resistance, especially in inorganic and organic acids and mixtures thereof, good general corrosion resistance, good structure stability as well as improved mechanical properties in combination with good workability, in particular in tubes, especially seamless tubes and seam welded tubes for application in these environments and with following composition, in weight-percent: 1 Cr 23.0-30.0 Ni 25.0-35.0 Mo  2.0-6.0 Mn  1.0-6.0 N   0-0.4 C up to 0.05 Si up to 1.0 S up to 0.02 Cu up to 3.0 W   0-6.
    Type: Application
    Filed: November 22, 2002
    Publication date: July 31, 2003
    Inventors: Babak Bahar, Johan Frodigh, Pasi Kangas, Ulf Kivisakk