Granted Patent
Utility
US 5,676,847 · App. 08/246,714
Method for recovering crystals from slurry with wash water recycle means
Inventors:
Ryoichi Yamamoto, Toshiyuki Sakata, Hiroshi Suzuki, Etsuro Okamoto
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: May 20, 1994
Inventors
Ryoichi Yamamoto
Toshiyuki Sakata
Hiroshi Suzuki
Etsuro Okamoto
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.