Granted Patent
Utility
US 5,484,819 · App. 08/322,815
Process for preparing polyamines for lighter color polyisocyanate based foam
Inventors:
Jeffrey Bolton, Ramon Kalyanaraman, Steven L. Schilling, Clarence D. Blue
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Oct 13, 1994
Inventors
Jeffrey Bolton
Ramon Kalyanaraman
Steven L. Schilling
Clarence D. Blue
Assignee (at issue)
Bayer Aktiengesellschaft
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.