Granted Patent
Utility
US 6,187,215 · App. 09/260,427
Photochemically etched plates for synthetic fiber-forming spin packs and method of making same
Inventors:
Matthew B. Hoyt, Charles F. Helms, Jr.
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Mar 1, 1999
Inventors
Matthew B. Hoyt
Charles F. Helms, Jr.
Assignee (at issue)
BASF SE
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.