Patents by Inventor David S. Bergstrom
David S. Bergstrom 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).
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Publication number: 20220074025Abstract: Nickel-based alloys having improved localized corrosion resistance, improved stress-corrosion cracking (SCC) resistance and impact strength are disclosed. The improvements come from the provision of compositions that are resistant to deleterious phase formation and from the addition of alloying elements that improve corrosion resistance, impact strength, and SCC resistance. The nickel-based alloys of the present invention have controlled amounts of Ni, Cr, Fe, Mo, Co, Cu, Mn, C, N, Si, Ti, Nb, Al, and B. When subjected to post-cladding heat treatments or welding, the nickel-based alloys retain their corrosion resistance and possess desirable impact strengths.Type: ApplicationFiled: November 19, 2021Publication date: March 10, 2022Inventors: Nacéra Sabrina Meck, David S. Bergstrom, John J. Dunn, David C. Berry
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Patent number: 11186898Abstract: Nickel-based alloys having improved localized corrosion resistance, improved stress-corrosion cracking (SCC) resistance and impact strength are disclosed. The improvements come from the provision of compositions that are resistant to deleterious phase formation and from the addition of alloying elements that improve corrosion resistance, impact strength, and SCC resistance. The nickel-based alloys of the present invention have controlled amounts of Ni, Cr, Fe, Mo, Co, Cu, Mn, C, N, Si, Ti, Nb, Al, and B. When subjected to post-cladding heat treatments or welding, the nickel-based alloys retain their corrosion resistance and possess desirable impact strengths.Type: GrantFiled: March 8, 2021Date of Patent: November 30, 2021Assignee: ATI Properties LLCInventors: Nacéra Sabrina Meck, David S. Bergstrom, John J. Dunn, David C. Berry
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Publication number: 20210277501Abstract: Nickel-based alloys having improved localized corrosion resistance, improved stress-corrosion cracking (SCC) resistance and impact strength are disclosed. The improvements come from the provision of compositions that are resistant to deleterious phase formation and from the addition of alloying elements that improve corrosion resistance, impact strength, and SCC resistance. The nickel-based alloys of the present invention have controlled amounts of Ni, Cr, Fe, Mo, Co, Cu, Mn, C, N, Si, Ti, Nb, Al, and B. When subjected to post-cladding heat treatments or welding, the nickel-based alloys retain their corrosion resistance and possess desirable impact strengths.Type: ApplicationFiled: March 8, 2021Publication date: September 9, 2021Inventors: Nacéra Sabrina Meck, David S. Bergstrom, John J. Dunn, David C. Berry
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Patent number: 10370748Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.Type: GrantFiled: February 8, 2017Date of Patent: August 6, 2019Assignee: ATI PROPERTIES LLCInventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Patent number: 10323308Abstract: An austenitic stainless steel composition having low nickel and molybdenum and exhibiting high corrosion resistance and good formability. The austenitic stainless steel includes, in weight %, up to 0.20 C, 2.0-6.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 5.0-7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities. The austenitic stainless steel has a ferrite number less than 11 and an MD30 value less than ?10° C.Type: GrantFiled: March 1, 2017Date of Patent: June 18, 2019Assignee: ATI PROPERTIES LLCInventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Patent number: 9873932Abstract: An austenitic stainless steel composition including relatively low nickel and molybdenum levels, and exhibiting corrosion resistance, resistance to elevated temperature deformation, and formability properties comparable to certain alloys including higher nickel and molybdenum levels. Embodiments of the austenitic stainless steel include, in weight %, up to 0.20 C, 2.0 to 9.0 Mn, up to 2.0 Si, 16.0 to 23.0 Cr, 1.0 to 7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.05 to 0.35 N, up to 4.0 W, (7.5(C))?(Nb+Ti+V+Ta+Zr)?1.5, up to 0.01 B, up to 1.0 Co, iron and impurities. Additionally, embodiments of the steel may include 0.5?(Mo+W/2)?5.0 and/or 1.0?(Ni+Co)?8.0.Type: GrantFiled: August 5, 2015Date of Patent: January 23, 2018Assignee: ATI PROPERTIES LLCInventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Patent number: 9822435Abstract: An austenitic stainless steel composition including relatively low Ni and Mo levels, and exhibiting corrosion resistance, resistance to elevated temperature deformation, and formability properties comparable to certain alloys including higher Ni and Mo levels. Embodiments of the austenitic stainless steel include, in weight percentages, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 15.0-23.0 Cr, 1.0-9.5 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.05-0.35 N, (7.5(C))?(Nb+Ti+V+Ta+Zr)?1.5, Fe, and incidental impurities.Type: GrantFiled: August 5, 2015Date of Patent: November 21, 2017Assignee: ATI PROPERTIES LLCInventors: David S. Bergstrom, James M. Rakowski
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Publication number: 20170167006Abstract: An austenitic stainless steel composition having low nickel and molybdenum and exhibiting high corrosion resistance and good formability. The austenitic stainless steel includes, in weight %, up to 0.20 C, 2.0-6.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 5.0-7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities. The austenitic stainless steel has a ferrite number less than 11 and an MD30 value less than ?10° C.Type: ApplicationFiled: March 1, 2017Publication date: June 15, 2017Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Publication number: 20170145548Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.Type: ApplicationFiled: February 8, 2017Publication date: May 25, 2017Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Patent number: 9624564Abstract: An austenitic stainless steel composition having low nickel and molybdenum and exhibiting high corrosion resistance and good formability. The austenitic stainless steel includes, in weight %, up to 0.20 C, 2.0-6.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 5.0-7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities. The austenitic stainless steel has a ferrite number less than 11 and an MD30 value less than ?10° C.Type: GrantFiled: September 26, 2014Date of Patent: April 18, 2017Assignee: ATI PROPERTIES LLCInventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Patent number: 9617628Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.Type: GrantFiled: August 11, 2014Date of Patent: April 11, 2017Assignee: ATI PROPERTIES LLCInventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Publication number: 20150337422Abstract: An austenitic stainless steel composition including relatively low nickel and molybdenum levels, and exhibiting corrosion resistance, resistance to elevated temperature deformation, and formability properties comparable to certain alloys including higher nickel and molybdenum levels. Embodiments of the austenitic stainless steel include, in weight %, up to 0.20 C, 2.0 to 9.0 Mn, up to 2.0 Si, 16.0 to 23.0 Cr, 1.0 to 7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.05 to 0.35 N, up to 4.0 W, (7.5(C))?(Nb+Ti+V+Ta+Zr)?1.5, up to 0.01 B, up to 1.0 Co, iron and impurities. Additionally, embodiments of the steel may include 0.5?(Mo+W/2)?5.0 and/or 1.0?(Ni+Co)?8.0.Type: ApplicationFiled: August 5, 2015Publication date: November 26, 2015Inventors: David S. Bergstrom, James M. Rakowski
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Publication number: 20150337421Abstract: An austenitic stainless steel composition including relatively low Ni and Mo levels, and exhibiting corrosion resistance, resistance to elevated temperature deformation, and formability properties comparable to certain alloys including higher Ni and Mo levels. Embodiments of the austenitic stainless steel include, in weight percentages, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 15.0-23.0 Cr, 1.0-9.5 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.05-0.35 N, (7.5(C))?(Nb+Ti+V+Ta+Zr)?1.5, Fe, and incidental impurities.Type: ApplicationFiled: August 5, 2015Publication date: November 26, 2015Inventors: David S. Bergstrom, James M. Rakowski
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Patent number: 9133538Abstract: An austenitic stainless steel composition including relatively low nickel and molybdenum levels, and exhibiting corrosion resistance, resistance to elevated temperature deformation, and formability properties comparable to certain alloys including higher nickel and molybdenum levels. Embodiments of the austenitic stainless steel include, in weight %, up to 0.20 C: 2.0 to 9.0 Mn, up to 2.0 Si, 16.0 to 23.0 Cr, 1.0 to 7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.05 to 0.35 N, up to 4.0 W, (7.5(C))?(Nb+Ti+V+Ta+Zr)?1.5, up to 0.01 B, up to 1.0 Co, iron and impurities. Additionally, embodiments of the steel may include 0.5?(Mo+W/2)?5.0 and/or 1.0?(Ni+Co)?8.0.Type: GrantFiled: November 21, 2012Date of Patent: September 15, 2015Assignee: ATI PROPERTIES, INC.Inventors: James M. Rakowski, David S. Bergstrom, Charles P. Stinner, John J. Dunn, John F. Grubb
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Patent number: 9121089Abstract: An austenitic stainless steel composition including relatively low Ni and Mo levels, and exhibiting corrosion resistance, resistance to elevated temperature deformation, and formability properties comparable to certain alloys including higher Ni and Mo levels. Embodiments of the austenitic stainless steel include, in weight percentages, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 15.0-23.0 Cr, 1.0-9.5 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.05-0.35 N, (7.5(C))?(Nb+Ti+V+Ta+Zr)?1.5, Fe, and incidental impurities.Type: GrantFiled: November 20, 2012Date of Patent: September 1, 2015Assignee: ATI Properties, Inc.Inventors: David S. Bergstrom, James M. Rakowski
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Publication number: 20150010424Abstract: An austenitic stainless steel composition having low nickel and molybdenum and exhibiting high corrosion resistance and good formability. The austenitic stainless steel includes, in weight %, up to 0.20 C, 2.0-6.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 5.0-7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities. The austenitic stainless steel has a ferrite number less than 11 and an MD30 value less than ?10° C.Type: ApplicationFiled: September 26, 2014Publication date: January 8, 2015Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Publication number: 20140369882Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.Type: ApplicationFiled: August 11, 2014Publication date: December 18, 2014Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Patent number: 8877121Abstract: An austenitic stainless steel composition having low nickel and molybdenum and exhibiting high corrosion resistance and good formability. The austenitic stainless steel includes, in weight %, up to 0.20 C, 2.0-6.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 5.0-7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities. The austenitic stainless steel has a ferrite number less than 11 and an MD30 value less than ?10° C.Type: GrantFiled: February 26, 2008Date of Patent: November 4, 2014Assignee: ATI Properties, Inc.Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Patent number: 8858872Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.Type: GrantFiled: October 15, 2012Date of Patent: October 14, 2014Assignee: ATI Properties, Inc.Inventors: David S. Bergstrom, James M. Rakowski, Charles P Stinner, John J. Dunn, John F. Grubb
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Patent number: 8813342Abstract: A method for producing a single-clad or multiple-clad product includes providing a welded assembly comprising a cladding material disposed on a substrate material. Both the substrate material and the cladding material are individually selected alloys. At least a first edge of the cladding material of the welded assembly does not extend to a first edge of the substrate material and thereby provides a margin between the first edges. A material that is an alloy having hot strength greater than the cladding material is within the margin and adjacent the first edge of the cladding material. The welded assembly is hot rolled to provide a hot rolled band, and the material within the margin inhibits the cladding material from spreading beyond the edge of the substrate material during the hot rolling. In certain embodiments of the methods, the substrate material is stainless steel and the cladding material is nickel or a nickel alloy.Type: GrantFiled: February 4, 2013Date of Patent: August 26, 2014Assignee: ATI Properties, Inc.Inventors: David S. Bergstrom, Kris J. Schott, Mark A. Tarhay