Granted Patent
Utility
US 6,093,750 · App. 09/373,011
Expandable thermoplastic polymer particles and method for making same
Inventors:
Thomas Orr Craig, George B. Klingensmith
Patented Case
View Patent ↗
Granted: Jul 25, 2000
Filed: Aug 11, 1999
Inventors
Thomas Orr Craig
George B. Klingensmith
Assignee (at issue)
HUNTSMAN 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.