Granted Patent
Utility
US 4,987,187 · App. 07/453,851
Polyblends of thermoplastic copolyesters and styrene acrylonitrile copolymers
Inventors:
Kishore Udipi, Allen R. Padwa
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Dec 20, 1989
Inventors
Kishore Udipi
Allen R. Padwa
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.