Granted Patent
Utility
US 4,820,776 · App. 06/726,567
Hydrocarbon compositions containing polyolefin graft polymers having amine and phenothiazine grafted moieties
Inventors:
Maria M. Kapuscinski, Larry D. Grina, Ronald E. Jones, Rodney L. Sung
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Apr 24, 1985
Inventors
Maria M. Kapuscinski
Larry D. Grina
Ronald E. Jones
Rodney L. Sung
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.