Granted Patent
Utility
US 4,668,564 · App. 06/824,492
Hydrogel materials for hot and cold therapy and method for forming same
Inventor:
Lewis Preole Orchard, IV
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Jan 31, 1986
Inventor
Lewis Preole Orchard, IV
Assignee (at issue)
Spenco Medical Corporation
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.