Granted Patent
Utility
US 5,316,621 · App. 07/862,539
Method of pulping waste pressure-sensitive adhesive paper
Inventors:
Osamu Kitao, Masaru Tsuji, Masatoshi Okuda, Shunichi Uchimura, Jun Tanaka
Patented Case
View Patent ↗
Granted: May 31, 1994
Filed: Jun 18, 1992
Inventors
Osamu Kitao
Masaru Tsuji
Masatoshi Okuda
Shunichi Uchimura
Jun Tanaka
Assignee (at issue)
Kanzaki Paper Manufacturing Co., 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.