Granted Patent
Utility
US 5,827,809 · App. 08/730,363
Low-residue macroemulsion cleaner with perchloroethylene
Inventors:
Eric L. Mainz, Janice M. Nyberg
Patented Case
View Patent ↗
Granted: Oct 27, 1998
Filed: Oct 15, 1996
Inventors
Eric L. Mainz
Janice M. Nyberg
Assignee (at issue)
Vulcan Materials Company
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.