Stephen R. Clarke — 10 Patents at Aqua Metals

Stephen R. Clarke has been granted 10 US patents while listed as an inventor at Aqua Metals. The first was granted in 1998 and the most recent in February 2022. Stephen R. Clarke ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Stephen R. Clarke in Orinda, CA, US.

Patents per Year

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
11239507	Devices and method for smelterless recycling of lead acid batteries	Brian Dougherty, Michael John King, Robert Lewis Clarke, Michael David Hurwitz	2022-02-01	$1,421,000
10793957	Closed loop systems and methods for recycling lead acid batteries	Robert Lewis Clarke, Brian Dougherty	2020-10-06	$1,723,000
10689769	Electrodeposited lead composition, methods of production, and uses	Michael John King, Brian Dougherty, Michael David Hurwitz	2020-06-23	$2,036,000
10665907	Devices and method for smelterless recycling of lead acid batteries	Robert Lewis Clarke, Michael David Hurwitz, Michael John King, Selwyn Mould	2020-05-26	$1,492,000
10340561	Devices and method for smelterless recycling of lead acid batteries	Brian Dougherty, Michael John King, Robert Lewis Clarke, Michael David Hurwitz	2019-07-02	$2,066,000
9837689	Method for smelterless recycling of lead acid batteries	Robert Lewis Clarke, Michael David Hurwitz, Michael John King, Selwyn Mould	2017-12-05	$1,275,000
9672953	Devices and methods for advanced phase-locked materials	Robert Clarke	2017-06-06
6383395	Water treatment method and apparatus	Richard Clarke, Roderick Murdock, Clive Butler, Sam Mohanta	2002-05-07
5865964	Apparatus for stripping ions from concrete and soil	Robert Lewis Clarke	1999-02-02
5846393	Electrochemically-aided biodigestion of organic materials	Robert Lewis Clarke, Reinout Lageman, Wieberen Pool	1998-12-08