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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11242584 B1

PDFFull Text
Date of Patent:
Feb. 08, 2022

Filed:

Jul. 20, 2016

Duplex stainless steel and formed object thereof

Applicant:

Sandvik Intellectual Property Ab, Sandviken, SE;

Inventors:

Daniel Gullberg, Gavle, SE;

Christina Haraldsson, Sandviken, SE;

Anders Wilson, Gavle, SE;

Alexander Scheerder, Sittard, NL;

Kirk Ofei, Sittard, NL;

Assignee:

Sandvik Intellectual Property AB, Sandviken, SE;

Attorney:

Morgan, Lewis & Bockius LLP

Primary Examiner:

Humera N Sheikh

Assistant Examiner:

Katherine A Christy

Int. Cl.
CPC ...
C22C 38/44 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/42 (2006.01); C21D 6/00 (2006.01); C21D 9/08 (2006.01); B01D 3/32 (2006.01); C07C 273/04 (2006.01); F28F 21/08 (2006.01); B01J 19/02 (2006.01); C21D 8/00 (2006.01); C22C 33/02 (2006.01); C22C 38/58 (2006.01); C22C 33/04 (2006.01); B22F 3/15 (2006.01); C21D 8/10 (2006.01);
U.S. Cl.
CPC ...
C22C 38/44 (2013.01); B01D 3/32 (2013.01); B01J 19/02 (2013.01); C07C 273/04 (2013.01); C21D 6/004 (2013.01); C21D 8/005 (2013.01); C21D 9/08 (2013.01); C22C 33/0285 (2013.01); C22C 33/04 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/58 (2013.01); F28F 21/083 (2013.01); B01J 2219/0286 (2013.01); B22F 3/15 (2013.01); C21D 8/105 (2013.01); C21D 2211/001 (2013.01); C21D 2211/005 (2013.01); Y02P 10/122 (2015.11);
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.

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