Granted Patent
Utility
US 5,364,958 · App. 08/079,806
Process for the production of methylene-crosslinked polyphenylene polyisocyanate
Inventors:
Noritoshi Ishida, Zunzi Tashima, Naoki Sato, Michiya Takasaki, Masaaki Iijima, Kazuyuki Kuroda, Kazunari Nitta
Patented Case
View Patent ↗
Granted: Nov 15, 1994
Filed: Jun 22, 1993
Inventors
Noritoshi Ishida
Zunzi Tashima
Naoki Sato
Michiya Takasaki
Masaaki Iijima
Kazuyuki Kuroda
Kazunari Nitta
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.