Granted Patent
Utility
US 6,284,810 · App. 09/258,625
Method and apparatus for microcellular polymer extrusion
Inventors:
Theodore A. Burnham, Sung W. Cha, Robert H. Walat, Roland Kim, Jere R. Anderson, James F. Stevenson, Nam P. Suh, Matthew Pallaver
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Feb 26, 1999
Inventors
Theodore A. Burnham
Sung W. Cha
Robert H. Walat
Roland Kim
Jere R. Anderson
James F. Stevenson
Nam P. Suh
Matthew Pallaver
Assignee (at issue)
Trexel, 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.