Granted Patent
Utility
US 5,433,909 · App. 08/031,238
Method of making controlled porosity expanded polytetrafluoroethylene products
Inventors:
Paul Martakos, Theodore Karwoski, Steve A. Herweck
Patented Case
View Patent ↗
Granted: Jul 18, 1995
Filed: Mar 12, 1993
Inventors
Paul Martakos
Theodore Karwoski
Steve A. Herweck
Assignee (at issue)
ATRIUM MEDICAL CORPORATION
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.