Granted Patent
Utility
US 6,742,345 · App. 10/107,896
Temperature control system using aqueous 1,3-propanediol solution
Inventor:
Richard P. Carr
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Mar 27, 2002
Inventor
Richard P. Carr
Assignee (at issue)
The Penray Companies, 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.