Granted Patent
Utility
US 6,630,517 · App. 09/355,338
Process for hydrolyzing and recycling a polyurethane
Inventors:
Satoshi Nishida, Osamu Kato, Yoshiyuki Nagase, Ryuichi Fukuzato, Masahiro Yamagata, Katsuhisa Kodama, Terukazu Matsuda, Shigetoshi Suzuki, Takao Naito
Patented Case
View Patent ↗
Granted: Oct 7, 2003
Filed: Oct 7, 1999
Inventors
Satoshi Nishida
Osamu Kato
Yoshiyuki Nagase
Ryuichi Fukuzato
Masahiro Yamagata
Katsuhisa Kodama
Terukazu Matsuda
Shigetoshi Suzuki
Takao Naito
Assignees (at issue)
Kabushiki Kaisha Kobe Seiko Sho
Takeda Chemical Industries Ltd.
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.