U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

British merchant Peter Durand invented the tin can in 1810.

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

Inventor: Kenichi Nagao

Address: Amagasaki, JP
No. of patents: 1
Last patent issue date: 02/09/1999

Number	Title	Issue Date
5869694	Process for preparing 4-hydroxy-2-pyrrolidone A improved process for preparing 4-hydroxy-2-pyrrolidone of the formula ##STR1## which is characterized in reacting a 4-halogeno-3-hydroxybutyrate and an alkali metal or alkaline earth metal azide, to produce a 4-azido-3-hydroxybutyrate and hydrogena...	02/09/1999