Granted Patent
Utility
US 4,464,539 · App. 06/480,779
Process for producing .alpha.,.beta.-unsaturated carboxylic acids or esters thereof
Inventors:
Masao Hashimoto, Tadatoshi Honda
Patented Case
View Patent ↗
Granted: Aug 7, 1984
Filed: Apr 6, 1983
Inventors
Masao Hashimoto
Tadatoshi Honda
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.