Granted Patent
Utility
US 5,225,451 · App. 07/935,783
Ultra low density polyolefin foam, foamable polyolefin compositions and process for making same
Inventors:
John E. Rogers, Ronnie D. Kisner
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Aug 27, 1992
Inventors
John E. Rogers
Ronnie D. Kisner
Assignee (at issue)
Astro-Valcour, Incorporated
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.