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.:
Date of Patent:
Mar. 29, 2022
Filed:
Jan. 21, 2013
Applicant:
Rise Innventia Ab, Stockholm, SE;
Inventors:
Elisabeth Sjöholm, Märsta, SE;
Göran Gellerstedt, Sollentuna, SE;
Rickard Drougge, Märsta, SE;
Ida Norberg, Sollentuna, SE;
Assignee:
RISE INNVENTIA AB, Stockholm, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01F 9/17 (2006.01); D01D 5/08 (2006.01); B29C 48/05 (2019.01); B29C 48/00 (2019.01); B29C 48/91 (2019.01); D01D 10/02 (2006.01); C08H 7/00 (2011.01); D01F 9/00 (2006.01); C01B 32/05 (2017.01); B29C 48/04 (2019.01); B29K 96/00 (2006.01); B29K 105/00 (2006.01); B29L 31/00 (2006.01);
U.S. Cl.
CPC ...
D01F 9/17 (2013.01); B29C 48/022 (2019.02); B29C 48/04 (2019.02); B29C 48/05 (2019.02); B29C 48/91 (2019.02); C01B 32/05 (2017.08); C08H 6/00 (2013.01); D01D 5/08 (2013.01); D01D 10/02 (2013.01); D01F 9/00 (2013.01); B29K 2096/00 (2013.01); B29K 2105/0067 (2013.01); B29L 2031/731 (2013.01);
Abstract
A method for producing a stabilized lignin fiber from softwood alkaline lignin by heat treatment in the absence of oxidant is disclosed. The stabilized lignin fiber can be further treated to obtain carbon fiber.