Granted Patent
Utility
US 6,288,153 · App. 09/227,569
Polyhexamethyleneadipamide fiber and composition
Inventors:
Katsuya Shimizu, Hiroshi Tomiyama
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Jan 8, 1999
Inventors
Katsuya Shimizu
Hiroshi Tomiyama
Assignee (at issue)
ASAHI KASEI KABUSHIKI KAISHA
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.