Granted Patent
Utility
US 6,156,839 · App. 09/270,377
Aqueous dispersion of small particles of polytetrafluoroethylene
Inventors:
Huey Shen Wu, Jack Hegenbarth, Xin Chen, Jian-Guo Chen
Patented Case
View Patent ↗
Granted: Dec 5, 2000
Filed: Mar 16, 1999
Inventors
Huey Shen Wu
Jack Hegenbarth
Xin Chen
Jian-Guo Chen
Assignee (at issue)
W. L. Gore & Associates, 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.