Granted Patent
Utility
US 5,340,537 · App. 08/048,777
Temperature indicating compositions
Inventor:
Richard B. Barrett
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: Apr 16, 1993
Inventor
Richard B. Barrett
Assignee (at issue)
Big Three Industries, 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.