Granted Patent
Utility
US 4,120,851 · App. 05/826,442
Process for polymerizing high nitrile ABS polyblends
Inventors:
Henry K. Chi, Alton L. Higgins
Patented Case
View Patent ↗
Granted: Oct 17, 1978
Filed: Aug 22, 1977
Inventors
Henry K. Chi
Alton L. Higgins
Assignee (at issue)
Monsanto Company
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.