Granted Patent
Utility
US 4,323,487 · App. 06/087,682
Absorbent starch graft polymer and method of its preparation
Inventors:
Duane A. Jones, Lyle F. Elmquist
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Oct 22, 1979
Inventors
Duane A. Jones
Lyle F. Elmquist
Assignee (at issue)
Henkel Limited
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.