Granted Patent
Utility
US 5,326,488 · App. 08/016,232
Mannich reaction product and process for producing the same and use of the product
Inventors:
Tomiyasu Minokami, Hiroaki Koshima, Hirotaka Yamasaki, Masahisa Gotoh
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Feb 11, 1993
Inventors
Tomiyasu Minokami
Hiroaki Koshima
Hirotaka Yamasaki
Masahisa Gotoh
Assignee (at issue)
IDEMITSU KOSAN 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.