IP Library › Granted Patent US 4,335,258
Granted Patent Utility
US 4,335,258 · App. 06/109,219

Process for producing methacrylic acid

Inventors: Takeru Onoda, Masayuki Otake, Jutaro Yamaguchi
Patented Case View Patent ↗
Granted: Jun 15, 1982 Filed: Jan 3, 1980
Inventors
Takeru Onoda
Masayuki Otake
Jutaro Yamaguchi
Assignee (at issue)
Mitsubishi Chemical 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,335,258
App. No.
06/109,219
Filed
1980-01-03
Granted
1982-06-15
Kind
A