Granted Patent
Utility
US 4,640,788 · App. 06/728,635
Hydrocarbon compositions containing polyolefin graft polymers
Inventors:
Maria M. Kapuscinski, Christopher S. Liu, William P. Hart, Larry D. Grina
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Apr 29, 1985
Inventors
Maria M. Kapuscinski
Christopher S. Liu
William P. Hart
Larry D. Grina
Assignee (at issue)
Texaco 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.