Granted Patent
Utility
US 6,313,321 · App. 09/603,842
Process for preparing .beta.-hydroxy-.gamma.-butyrolactones and .beta.-(meth)acryloyloxy-.gamma.-butrolactones
Inventors:
Naoshi Murata, Kunihiko Sakano, Tetsuya Ikemoto
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Jun 26, 2000
Inventors
Naoshi Murata
Kunihiko Sakano
Tetsuya Ikemoto
Assignee (at issue)
MITSUBISHI ELECTRIC CORPORATION
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.