Granted Patent
Utility
US 6,692,828 · App. 10/253,026
High chlorine and heat resistant spandex fiber and manufacturing method thereof
Inventors:
Byung Song, Tae-Woo Lee, Ji Won Kim, Seung Won Seo, Dae Hwi Lee
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Sep 24, 2002
Inventors
Byung Song
Tae-Woo Lee
Ji Won Kim
Seung Won Seo
Dae Hwi Lee
Assignees (at issue)
HYOSUNG CORPORATION
DOOBON INC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.