Granted Patent
Utility
US 4,481,722 · App. 06/391,368
System for protecting a rotary dryer from thermal stress
Inventors:
Fredrick Addison Guy, Robert S. Ball
Patented Case
View Patent ↗
Granted: Nov 13, 1984
Filed: Jun 23, 1982
Inventors
Fredrick Addison Guy
Robert S. Ball
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.