Granted Patent
Utility
US 5,512,607 · App. 08/469,308
Unsaturated epoxy ester with quaternary ammonium and phosphate groups
Inventors:
Keiichi Kinashi, Hiroshi Samukawa, Reiko Chiba
Patented Case
View Patent ↗
Granted: Apr 30, 1996
Filed: Jun 6, 1995
Inventors
Keiichi Kinashi
Hiroshi Samukawa
Reiko Chiba
Assignee (at issue)
W.R. Grace & Co. Conn.
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.