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ESS Tech, Inc. (GWH)

OTC: GWH · Miscellaneous Electrical Machinery, Equipment & Supplies · Wilsonville, OR · filing with the SEC since 2020
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◀ Past 2.1● Present 2.2▶ Future 3.1
1 est.
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Patents

US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026

236 patents granted to the 3 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to ESS Tech, Inc.’s names, not what it holds today.

Patents granted
236
235 utility, 1 design, 1976 to Dec 31, 2025
Granted in 2025
7
Against 11 in 2024 and 22 in 2023
Applications published
199
7 of them in 2025
Names they are printed under
3
its own name
By yearGrantedApplications published
'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
Each pair is one calendar year. Applications are published about eighteen months after filing, so the newest years read low.
What they are aboutgrants since 2021
Electrical machinery, apparatus, energy53
Basic communication processes4
Other consumer goods1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name3 counted
ESS TECH, INC. its own name
US, as the owner printed on each patent
234 granted
73 published
ESS TECH, INC. its own name
named as the applicant on its applications, in US
0 granted
126 published
ESSTECH, INC. its own name
US, as the owner printed on each patent
2 granted
0 published
Newest grantseach row opens the USPTO’s own copy
GrantedPatentTitleFieldOwner as printed
Apr 22, 202512,283,815Methods and systems for managing energy consumption of cryptocurrency miningElectrical machinery, apparatus, energyESS TECH, INC.
Apr 22, 202512,283,731Cost-efficient high energy density redox flow batteryElectrical machinery, apparatus, energyESS TECH, INC.
Apr 22, 202512,283,730Cost-efficient high energy density redox flow batteryElectrical machinery, apparatus, energyESS TECH, INC.
Apr 1, 202512,266,829Multi-stage rebalancing reactor for redox flow battery systemElectrical machinery, apparatus, energyESS TECH, INC.
Mar 18, 202512,255,370Electrode assembly for a redox flow batteryElectrical machinery, apparatus, energyESS TECH, INC.
Feb 11, 202512,224,757Method and apparatus for reducing jitter in a phase-locked loopBasic communication processesESS TECH, INC.
Jan 7, 202512,191,548Hybrid redox fuel cell systemElectrical machinery, apparatus, energyESS TECH, INC.
Dec 24, 202412,176,590Flow battery cleansing cycle to maintain electrolyte health and system performanceElectrical machinery, apparatus, energyESS TECH, INC.
Dec 3, 202412,160,025Double-stack redox flow batteryElectrical machinery, apparatus, energyESS TECH, INC.
Oct 29, 202412,132,241Method and system for rebalancing electrolytes in a redox flow battery systemElectrical machinery, apparatus, energyESS TECH, INC.
Newest applications publishedan application is a clue, never a plan
PublishedApplicationTitleFieldOwner as printed
Aug 7, 20252025/0249442REBALANCING REACTOR RECOVERYChemical engineeringESS TECH, INC.
Jul 17, 20252025/0233184COST-EFFICIENT HIGH ENERGY DENSITY REDOX FLOW BATTERYElectrical machinery, apparatus, energyESS TECH, INC.
Jun 19, 20252025/0201871THERMOPLASTIC WELDED FLOW BATTERY POWER MODULEElectrical machinery, apparatus, energyESS TECH, INC.
Feb 6, 20252025/0046849DOUBLE-STACK REDOX FLOW BATTERYElectrical machinery, apparatus, energyESS TECH, INC.
Jan 9, 20252025/0015333FLOW BATTERY CLEANSING CYCLE TO MAINTAIN ELECTROLYTE HEALTH AND SYSTEM PERFORMANCEElectrical machinery, apparatus, energyESS TECH, INC.
Jan 2, 20252025/0006967METHODS AND SYSTEMS FOR SURFACE DISRUPTION OF BIPOLAR PLATE AND SUBSEQUENT USE THEREOF IN REDOX FLOW BATTERYElectrical machinery, apparatus, energyESS TECH, INC.
Jan 2, 20252025/0006966HYBRID REDOX FUEL CELL SYSTEMElectrical machinery, apparatus, energyESS TECH, INC.
Dec 19, 20242024/0421335INTEGRATED HYDROGEN RECYCLE SYSTEM USING PRESSURIZED MULTICHAMBER TANKElectrical machinery, apparatus, energyESS TECH, INC.
Nov 28, 20242024/0396067ELECTROLYTE HEALTH MANAGEMENT FOR REDOX FLOW BATTERYElectrical machinery, apparatus, energyESS TECH, INC.
Nov 28, 20242024/0396064ELECTROLYTE TANK VOLUME REBALANCINGElectrical machinery, apparatus, energyESS TECH, INC.
What it applied for, 2024 to 2025: Electrical machinery, apparatus, energy 33 · Engines, pumps, turbines 2 · Chemical engineering 2 · Measurement 1 · Machine tools 1.

A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.

SI Assistanton GWH · research, not advice