Granted Patent
Utility
US 4,708,812 · App. 06/749,098
Encapsulation of phase change materials
Inventor:
James C. Hatfield
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Jun 26, 1985
Inventor
James C. Hatfield
Assignee (at issue)
Union Carbide 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.