John David Withenshaw — 5 Patents at Warwick International Group Limited

John David Withenshaw has been granted 5 US patents while listed as an inventor at Warwick International Group Limited. The first was granted in 1990 and the most recent in May 2003. John David Withenshaw ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list John David Withenshaw in Holywell, GB.

Patents per Year

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #	Title	Co-Inventors	Date
6569286	Method for the alkaline bleaching of pulp with a peroxyacid based oxygen bleaching species using an agglomerated bleach activator	Jane Williams, Mark Ardern Chadwick, Neil Anthony Turner	2003-05-27
6080710	Bleach activator compositions	Mark Alexander France	2000-06-27
5800755	Agglomerated active with controlled release	Mark Ardern Chadwick, William J. Wilson	1998-09-01
5433881	Granulation process for making granular bleach activator compositions and resulting product	John Townend, Anthony J. Gradwell	1995-07-18
4921631	Bleach activator compositions	Anthony J. Gradwell	1990-05-01