Granted Patent
Utility
US 6,737,069 · App. 10/049,361
Cosmetic compositions containing amphoteric polyurethanes
Inventors:
Seiji Asaoka, Katsuya Koyama, Toshitaka Tsuzuki, Tomohiro Hashimoto
Patented Case
View Patent ↗
Granted: May 18, 2004
Filed: Feb 6, 2002
Inventors
Seiji Asaoka
Katsuya Koyama
Toshitaka Tsuzuki
Tomohiro Hashimoto
Assignee (at issue)
National Starch and Chemical Investment Holding Copporation
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.