Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DD

Daniel J. Despen — 37 Patents

CACarbon: 33 patents #2 of 29Top 7%
Oakdale, MN: #11 of 368 inventorsTop 3%
Minnesota: #1,443 of 52,454 inventorsTop 3%
Overall (All Time): #87,644 of 4,157,543Top 3%
37 Patents All Time

Issued Patents All Time

Showing 26–37 of 37 patents

Patent #TitleCo-InventorsDate
10982161 Process for producing high-carbon biogenic reagents James A. Mennell 2021-04-20
10889775 Systems and apparatus for production of high-carbon biogenic reagents James A. Mennell 2021-01-12
10611977 Methods and apparatus for enhancing the energy content of carbonaceous materials from pyrolysis James A. Mennell 2020-04-07
10174267 Process for producing high-carbon biogenic reagents James A. Mennell 2019-01-08
10167437 Systems and apparatus for production of high-carbon biogenic reagents James A. Mennell 2019-01-01
9845440 Methods and apparatus for enhancing the energy content of carbonaceous materials from pyrolysis James A. Mennell 2017-12-19
9752090 High-carbon biogenic reagents and uses thereof James A. Mennell, Steve Filips 2017-09-05
9724667 Carbon micro-plant James A. Mennell, David Reamer 2017-08-08
9475031 Carbon micro-plant James A. Mennell, David Reamer 2016-10-25
9388046 Systems and apparatus for production of high-carbon biogenic reagents James A. Mennell 2016-07-12
9388355 Process for producing high-carbon biogenic reagents James A. Mennell 2016-07-12
8920525 High-carbon biogenic reagents and uses thereof James A. Mennell, Steve Filips 2014-12-30