Patents by Inventor Christina HARALDSSON

Christina HARALDSSON 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: 20240141466
    Abstract: A corrosion resistant duplex stainless steel (ferritic austenitic alloy) is suitable for use in a plant for the production of urea. Uses of the corrosion resistant duplex stainless steel include in objects made of said duplex stainless steel, in methods for the production of urea, in a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and in methods of modifying an existing plant for the production of urea. In one aspect, the composition consists of in weight % (wt %): C 0.010 to 0.015; S 0.08 to 0.23; Mn 1.0 to 1.05; Cr 29.07 to 29.92; Ni 5.76 to 7.17; Mo 3.0 to 4.0; W max 2.55; N 0.3 to 0.35; Cu max 0.01; S max 0.008; P max 0.008; at least one of Ti, Nb, Hf, Ca, Ba, V, and B max 0.5 total; balance Fe and unavoidable occurring impurities.
    Type: Application
    Filed: January 9, 2024
    Publication date: May 2, 2024
    Applicant: Sandvik Intellectual Property AB
    Inventors: Daniel GULLBERG, Christina HARALDSSON, Anders WILSON, Alexander SCHEERDER, Kirk OFEI
  • Publication number: 20240035135
    Abstract: The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy) which is suitable for use in a plant for the production of urea; and uses thereof. The disclosure also relates to objects made of said duplex stainless steel. Furthermore, the present disclosure also relates to a method for the production of urea and to a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and to a method of modifying an existing plant for the production of urea.
    Type: Application
    Filed: October 5, 2023
    Publication date: February 1, 2024
    Inventors: Daniel GULLBERG, Christina HARALDSSON, Anders WILSON, Alexander Aleida Antonius SCHEERDER, Kirk Anguah OFEI
  • Publication number: 20220112585
    Abstract: The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy) which is suitable for use in a plant for the production of urea and uses thereof. The disclosure also relates to objects made of said duplex stainless steel. Furthermore, the present disclosure relates to a method for the production of urea and to a plant for the production of urea having one or more parts made from the duplex stainless steel, and to a method of modifying an existing plant for the production of urea.
    Type: Application
    Filed: December 20, 2021
    Publication date: April 14, 2022
    Applicant: Sandvik Intellectual Property AB
    Inventors: Daniel GULLBERG, Christina HARALDSSON, Anders WILSON, Alexander SCHEERDER, Kirk OFEI
  • Patent number: 11248285
    Abstract: The present disclosure relates to a new duplex stainless steel. Furthermore, the present disclosure relates to a product comprising the duplex stainless steel, which method comprises the step of performing a heat treatment on an object comprising the duplex stainless steel at a predetermined temperature and during a predetermined time.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: February 15, 2022
    Assignee: Sandvik Intellectual Property AB
    Inventors: Eleonora Bettini, Raghuveer Gaddam, Karin Antonsson, Guocai Chai, Christina Haraldsson, Siriki Raveendra
  • Patent number: 11242584
    Abstract: The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy), which is suitable for use in a plant for the production of urea and uses thereof. The disclosure also relates to objects made of the duplex stainless steel. Furthermore, the present disclosure relates to a method for the production of urea and to a plant for the production of urea having one or more parts made from the duplex stainless steel, and to a method of modifying an existing plant for the production of urea.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: February 8, 2022
    Assignee: Sandvik Intellectual Property AB
    Inventors: Daniel Gullberg, Christina Haraldsson, Anders Wilson, Alexander Scheerder, Kirk Ofei
  • Publication number: 20210156013
    Abstract: The present disclosure relates to a new duplex stainless steel. Furthermore, the present disclosure relates to a product comprising the duplex stainless steel, which method comprises the step of performing a heat treatment on an object comprising the duplex stainless steel at a predetermined temperature and during a predetermined time.
    Type: Application
    Filed: May 22, 2018
    Publication date: May 27, 2021
    Applicant: SANDVIK INTELLECTUAL PROPERTY AB
    Inventors: Eleonora BETTINI, Raghuveer GADDAM, Karin ANTONSSON, Guocai CHAI, Christina HARALDSSON, Siriki RAVEENDRA
  • Publication number: 20180209022
    Abstract: The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy), which is suitable for use in a plant for the production of urea and uses thereof. The disclosure also relates to objects made of the duplex stainless steel Furthermore, the present disclosure relates to a method for the production of urea and to a plant for the production of urea having one or more parts made from the duplex stainless steel, and to a method of modifying an existing plant for the production of urea.
    Type: Application
    Filed: July 20, 2016
    Publication date: July 26, 2018
    Inventors: Daniel GULLBERG, Christina HARALDSSON, Anders WILSSON, Alexander SCHEERDER, Kirk OFEI
  • Publication number: 20180195158
    Abstract: The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy) which is suitable for use in a plant for the production of urea; and uses thereof. The disclosure also relates to objects made of said duplex stainless steel. Furthermore, the present disclosure also relates to a method for the production of urea and to a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and to a method of modifying an existing plant for the production of urea.
    Type: Application
    Filed: July 20, 2016
    Publication date: July 12, 2018
    Applicant: STAMICARBON B.V.
    Inventors: Daniel GULLBERG, Christina HARALDSSON, Anders WILSON, Alexander Aleida Antonius SCHEERDER, Kirk Anguah OFEI