Granted Patent
Utility
US 5,391,670 · App. 08/103,461
Alkylation resins from polycyclic aromatic compounds
Inventors:
Atanu Biswas, Daniel William Klosiewicz
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: Aug 9, 1993
Inventors
Atanu Biswas
Daniel William Klosiewicz
Assignee (at issue)
HERCULES LLC
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.