Verdox, Inc.

WINCHESTER, MA · Clean tech · Private

Electro-swing adsorption (ESA) device using polymer-composite electrodes for direct electrical removal of sulfur dioxide (SO2) from gas streams

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Updated Oct 23, 2026

Sector: Clean tech
Headquarters: WINCHESTER, MA
Total capital: $499K

Federal grants: $499K; 2 awards · 2021; Rank in peer group#17 of 35
Private capital raised: None on recordNo Form D filings on SEC EDGAR. Some raises are not filed.
Federal contracts: None on recordNo federal contract awards found.
Granted patents: 6; 34 pending · first 2023; Rank in peer group#1 of 35

Capital timeline

Latest events

Apr 2021Federal grantEnergy · Phase II · Electro-swing adsorption for high efficiency direct air capture$249K
Feb 2021Federal grantNSF · Phase I · SBIR Phase I: Electrochemically-Mediated Highly Selective SO2 Scrubbing$250K

Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.

Standing among 35 peers

Line = median

Clean tech · Device

Federal grants#17 · top 49%
Granted patents#1 · top 3%

Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.

Founders and team

No founders are linked to this company yet.

Founders appear once a person is matched to the company through its own patents, grants or filings. We never infer people from social profiles.

Checked: USPTO inventors; federal award principal investigators; SEC Form D related persons · Oct 23, 2026

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What it has protected

USPTO · 6 granted of 40

Jul 28, 2026GrantedComposite For Electrochemical Gas SeparationUSPTOUS 12,691,409
Feb 12, 2026PendingElectrochemical Systems For Capture Of Acid GasesUSPTOApplication 19289483
Nov 4, 2025GrantedElectroactive Species And Method For Electrochemical Gas SeparationUSPTOUS 12,458,922

Show all 40 patent records

Composite For Electrochemical Gas SeparationJul 28, 2026 · US 12,691,409Granted
Electrochemical Systems For Capture Of Acid GasesFeb 12, 2026 · Application 19289483Pending
Electroactive Species And Method For Electrochemical Gas SeparationNov 4, 2025 · US 12,458,922Granted
Method For Electrochemical Gas SeparationOct 9, 2025 · Application 19240182Pending
Method For Electrochemical Gas SeparationJul 22, 2025 · US 12,364,949Granted
Quinone-containing Polymer, Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationJan 16, 2025 · Application 18712366Pending
Quinone-containing Poly(arylene), Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationDec 10, 2024 · US 12,162,980Granted
Method For Electrochemical Gas SeparationMar 19, 2024 · US 11,931,692Granted
Composite For Electrochemical Gas SeparationJan 18, 2024 · Application 18035968Pending
Composite For Electrochemical Gas SeparationDec 7, 2023 · Application 18035807Pending
Quinone-containing Poly(arylene), Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationOct 3, 2023 · US 11,773,209Granted
Electroswing Adsorption Cell With Patterned Electrodes For Separation Of Gas ComponentsDec 16, 2021 · Application 17345074Pending
Electroswing Adsorption Cell With Porous Electrodes For Separation Of Gas ComponentsApplication 63453042Pending
Quinone-containing Polymer, Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationApplication PCTUS2022050836Pending
Electroactive Species And Method For Electrochemical Gas SeparationApplication PCTUS2022035209Pending
Method For Electrochemical Gas SeparationApplication PCTUS2022015438Pending
Quinone-containing Polymer, Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationApplication 63282779Pending
Composite For Electrochemical Gas SeparationApplication PCTUS2021059048Pending
Composite For Electrochemical Gas SeparationApplication PCTUS2021049751Pending
Quinone-containing Poly(arylene), Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationApplication PCTUS2021049643Pending
Electroactive Species And Method For Electrochemical Gas SeparationApplication 63215619Pending
Electroswing Adsorption Cell With Patterned Electrodes For Separation Of Gas ComponentsApplication PCTUS2021036727Pending
Method For Electrochemical Gas SeparationApplication 63171762Pending
Electrochemical Cell With Patterned Electrodes For Separation Of Gas ComponentsApplication 63128358Pending
Composite For Electrochemical Gas SeparationApplication 63113321Pending
Quinone-containing Poly(arylene), Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationApplication 63111752Pending
Composite For Electrochemical Gas SeparationApplication 63111761Pending
Electrochemical Cell With Patterned Electrodes For Separation Of Gas ComponentsApplication 63037829Pending
Electroactive Polymer, Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationApplication 19164851Pending
Quinone-containing Polyureas And Polyurethanes As Redox-active MaterialsApplication 19619575Pending
Electroswing Adsorption Cell With Porous Electrodes For Separation Of Gas ComponentsApplication 19160141Pending
Electrochemical Systems For Capture Of Acid-gasesApplication PCTUS2025040491Pending
Quinone-containing Polyureas And Polyurethanes As Redox-active MaterialsApplication PCTUS2025010656Pending
Electrochemical Systems For Capture Of Acid GasesApplication 63680669Pending
Electrochemical Cell ControllerApplication PCTUS2024035711Pending
Electroactive Polymer, Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationApplication PCTUS2024029865Pending
Quinone-containing Polyureas And Polyurethanes As Redox-active MaterialsApplication 63561943Pending
Electroswing Adsorption Cell With Porous Electrodes For Separation Of Gas ComponentsApplication PCTUS2024016636Pending
Electrochemical Cell ControllerApplication 63511346Pending
Electroactive Polymer, Methods For The Manufacture Thereof, And Use For Electrochemical Gas SeparationApplication 63468043Pending

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Regulatory activity · Clean tech

Sector-level, not company-level

09 Jul 2026Air Plan Approval; Michigan; Redesignation and Maintenance Plan for the Partial St. Clair 2010 1-Hour Sulfur Dioxide (SO2) NAAQS Nonattainment AreaEnvironmental Protection Agency
02 Jul 2026Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment AreaEnvironmental Protection Agency
02 Jul 2026Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP ProvisionsEnvironmental Protection Agency
30 Jun 2026Epyrifenacil; Pesticide TolerancesEnvironmental Protection Agency
30 Jun 2026Fluoxapiprolin; Pesticide TolerancesEnvironmental Protection Agency
30 Jun 2026Chlormequat Chloride; Pesticide TolerancesEnvironmental Protection Agency

Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.

Sources

Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.

How to read this page

Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.

Data freshness

SEC Form D filings through Oct 23, 2026. SBIR and STTR awards through Oct 21, 2026.