Granted Patent
Utility
US 4,379,913 · App. 06/374,670
Compositions useful as internal antistatic additives for polymeric structures
Inventor:
Calvin J. Waitkus
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: May 4, 1982
Inventor
Calvin J. Waitkus
Assignee (at issue)
Diamond Shamrock 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.