Granted Patent
Utility
US 3,997,629 · App. 05/644,657
Dyeable propylene polymer compositions
Inventors:
Ramchandra K. Hulyalkar, Marvin M. Fein, Jan Edmond Vandegaer
Patented Case
View Patent ↗
Granted: Dec 14, 1976
Filed: Dec 29, 1975
Inventors
Ramchandra K. Hulyalkar
Marvin M. Fein
Jan Edmond Vandegaer
Assignee (at issue)
Dart Industries 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.