Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Claymax › William J. Simpson
WS

William J. Simpson — 7 Patents

CLClaymax: 2 patents #1 of 6Top 20%
3M: 1 patents #7,251 of 11,543Top 65%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
William J. Simpson has been granted 7 US patents while listed as an inventor at Claymax. The first was granted in 1991 and the most recent in February 2022. William J. Simpson ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list William J. Simpson in Salfords, IL, GB.

Patents per Year

Patents granted per year, 1991 to 2022Bar chart with a peak of 2 patents in 2020.peak 21991: 1 patents19911996: 1 patents19961997: 1 patents19972007: 1 patents20072020: 2 patents20202022: 1 patents2022

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
11242358 Metal ion complexes Llewellyn Stephen Frank Casbolt 2022-02-08
10845369 Sampling devices and methods of use Nerys Bennion, James Watkin, Russell M. I. Thomas 2020-11-24 $56,473,000
10550132 Metal ion complexes Llewellyn Stephen Frank Casbolt 2020-02-04
7297530 Device for use in monitoring a swab technique Catherine M. Ramsay 2007-11-20
5654064 Clay liner for steep slopes Martin Simpson 1997-08-05
5564864 Clay liner for steep slopes Martin Simpson 1996-10-15
5004684 Method for ATP extraction John R. M. Hammond 1991-04-02

Frequent Collaborators

Llewellyn Stephen Frank Casbolt2 shared
Martin Simpson2 shared
James Watkin1 shared
John R. M. Hammond1 shared
Catherine M. Ramsay1 shared
Nerys Bennion1 shared

Nearby-Ranked Inventors

Yu Du7
WOOSEUP YOUM7
Il Jae Moon7
Jacob Tyler Crosby7
Manamohan D. Mysore7
Timothy Batty7
Ty Hessler7
Justin Cole7
Xiaorong Chen7