Granted Patent
Utility
US 4,340,556 · App. 06/213,439
Production of fibrous sliver having particulate matter distributed therethrough
Inventor:
Evelyn Ciencewicki
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Dec 5, 1980
Inventor
Evelyn Ciencewicki
Assignee (at issue)
Personal Products 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.