Patent Leaderboard
USPTO Patent Rankings
Data through Sept 30, 2025
Search
Companies
Inventors
Cities
States
All Time
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1987
1986
1985
1984
1983
1982
1981
1980
Home
›
Companies
›
Pq Silicas Uk Limited
PL
Pq Silicas Uk Limited
Rank
(2011):
#15,816
of
22,517
Top 75%
2
inventors
1
Patents 2011
Top Inventors at Pq Silicas Uk Limited
2011
Showing
1–2
of
2
inventors
Rank
Name
Patents
1
Christine Elizabeth Marsden
1
1
Robert Parker
1
Related Companies
Pre Holding
1
Prasidiux
1
Prana Biotechnology Limited
1
Prairie View Industries
1
Praevium Research
1
Pq Bypass
1
Pq
1
Ppm Technologies Holdings
1
Ppi Technology Services
1