Granted Patent
Utility
US 5,250,427 · App. 07/904,194
Photoconversion of gasified organic materials into biologically-degradable plastics
Inventors:
Paul F. Weaver, Pin-Ching MANESS
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Jun 25, 1992
Inventors
Paul F. Weaver
Pin-Ching MANESS
Assignee (at issue)
Midwest Research Institute, 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.