Granted Patent
Utility
US 4,872,933 · App. 07/229,065
Method of forming rapidly disintegrating paper tubes
Inventor:
Richard R. Tews
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Aug 5, 1988
Inventor
Richard R. Tews
Assignee (at issue)
Kimberly-Clark Inc.
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.