Granted Patent
Utility
US 4,297,481 · App. 06/123,739
Process of forming polymeric polyamine/amide
Inventor:
Felek Jachimowicz
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Feb 22, 1980
Inventor
Felek Jachimowicz
Assignee (at issue)
W. R. Grace & Co.
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.