Granted Patent
Utility
US 6,207,085 · App. 09/283,349
Heat expandable compositions
Inventor:
Eva Ackerman
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Mar 31, 1999
Inventor
Eva Ackerman
Assignee (at issue)
Rectorseal, LLC
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.