Granted Patent
Utility
US 5,556,539 · App. 08/201,033
Apparatus for separating a liquid mixture by pervaporation
Inventors:
Masaaki Mita, Kenji Sugimoto, Seiji Sudoh, Katashi Shioda, Moriyoshi Kudoh
Patented Case
View Patent ↗
Granted: Sep 17, 1996
Filed: Feb 24, 1994
Inventors
Masaaki Mita
Kenji Sugimoto
Seiji Sudoh
Katashi Shioda
Moriyoshi Kudoh
Assignees (at issue)
MITSUBISHI CHEMICAL CORPORATION
Mitsubishi Kasei Engineering 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.