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COMPACT MEMBRANE SYSTEMS, INC.

Newport, DE · Clean tech · Private

Amorphous fluoropolymer facilitated transport membranes for CO2 separation from flue gas

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Updated · compactmembrane.com

Sector
Clean tech
Headquarters
Newport, DE
Latest Form D
$10.3M, Dec 2025
Total capital
$33.7M
Federal grants
$10.9M
37 awards · 2007–2021
Rank in peer group#3 of 15
Private capital raised
$22.8M
2 Form D · last Dec 2025
11 months since last filing
Federal contracts
None on recordNo federal contract awards found.
Granted patents
10
30 pending · first 2018
Rank in peer group#2 of 15

Capital timeline

20082012201620202024FEDERAL ↑EQUITY ↓Cumulative $34.1M$897K$792K$1M$1.3M$1.1M1st Form D$12.5M
20082012201620202024FEDERAL ↑EQUITY ↓Cumulative $34.1M$897K$1.3M$1.1M1st Form D$12.5M

Latest events

  • Private capital raisedForm D · SEC · 2nd filing$10.3M
  • Private capital raisedForm D · SEC · 1st filing$12.5M
  • Federal grantEnergy · Phase I · Low Cost Membranes for Carbon Capture$250K
  • Federal grantHealth and Human S · Phase I · Universal Membrane Dehydrator for Dewatering Pharmaceutical Solvents$225K
  • Federal grantEnergy · Phase II · Integrated Membrane Reactor for Enhancing Thermal & Chemical Reactors$1.1M
  • Federal grantAgriculture · Ethylene Permeation In Control Of Fruit Ripening$107K
  • Federal grantHealth and Human S · Phase II · Enhanced Recovery of Pharmaceutical Solvent driven by EPA Initiative$636K
Show 27 earlier federal awards
  • Federal grantEnergy · Phase I · Integrated Catalytic Membrane System for Modular Manufacturing Of On-Purpose Propylene at Shale Gas Sites$150K
  • Federal grantEnergy · Phase I · Integrated Membrane Reactor for Enhancing Thermal & Chemical Reactors$150K
  • Federal grantHealth and Human S · Phase II · Enhanced Recovery of Pharmaceutical Solvent driven by EPA Initiative$1.3M
  • Federal grantEnergy · Phase II · Enhanced Oxidative Dehydrogenation of Ethane with Facilitated Transport Membranes for Low Cost Production of Ethylene$1M
  • Federal grantEnergy · Phase I · Stable Facilitated Transport Membranes for C4 Separation$150K
  • Federal grantEnergy · Phase I · New Fluorinated Ionomers for Enhanced Oxygen Transport in Fuel Cell Cathodes$150K
  • Federal grantAgriculture · Enhanced Membranes For Sweetening Of Manure Based Biogas$600K
  • Federal grantHealth and Human S · Phase II · Novel Nanofiltration Membranes for Isolation of Pharmaceutical Compounds II$792K
  • Federal grantAgriculture · Enhanced Membranes For Dewatering Of Black Liquor$100K
  • Federal grantEnergy · Phase I · Enhanced Oxidative Dehydrogenation of Ethane with Facilitated Transport Membranes for Low Cost Production of Ethylene$155K
  • Federal grantHealth and Human S · Phase II · Novel Nanofiltration Membranes for Isolation of Pharmaceutical Compounds II$897K
  • Federal grantAgriculture · Low Cost Innovative Greener/safer Process For Converting Cellulose To Glucose$600K
  • Federal grantAgriculture · Enhanced Membranes For Sweetening Of Manure Based Biogas$100K
  • Federal grantEnergy · Phase I · High Oxygen/Nitrogen Selectivity Membranes$150K
  • Federal grantEnergy · Phase I · Integrated Chemically Resistant Membrane Contactors and Ionic Liquid Sorbants for Carbon Dioxide Concentration$150K
  • Federal grantEnergy · Phase I · Non-Fouling Polymeric Membrane for Algae Dewatering$150K
  • Federal grantAgriculture · Low Cost Innovative Greener/safer Process For Converting Cellulose To Glucose$100K
  • Federal grantAgriculture · Vegetable Oil Processing With Non-porous Polymer Membranes$100K
  • Federal grantAgriculture · De-acidification Of Feedstocks For Low Cost Biodiesel Production$100K
  • Federal grantAgriculture · Enhancing Biosynthesis Of Biofuels From Cellulosic Biomass$450K
  • Federal grantAgriculture · Venting Of Underground Storage Tanks Containing Ethanol-gasoline Blends$460K
  • Federal grantAgriculture · Solvent Recovery From Vegetable Oil Miscella By Novel Solvent-resistant Nanofiltration Membranes$460K
  • Federal grantAgriculture · Low Cost Fuel Grade Ethanol$400K
  • Federal grantAgriculture · Enhancing Biosynthesis Of Biofuels From Cellulosic Biomass (topic 8.8)$90K
  • Federal grantAgriculture · Solvent Recovery From Vegetable Oil Miscella By Novel Solvent-resistant Nanofiltration Membranes$80K
  • Federal grantAgriculture · Venting Of Underground Storage Tanks Containing Ethanol-gasoline Blends$80K
  • Federal grantAgriculture · Low Cost Fuel Grade Ethanol$80K

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.

5 records have no date or no amount, so they aren’t placed on the timeline.

Federal first

179months

from COMPACT MEMBRANE SYSTEMS, INC.’s first federal award to its first private round.

First federal award · May 2008
Agriculture · $80K
First Form D · Apr 2023
$12.5M · 1st Form D
Awards before first raise
32 awards

An association in public records, not a cause or a prediction.

Standing among 15 peers

Line = median

Clean tech · Material

  • Federal grants#3 · top 20%
  • Granted patents#2 · top 13%
  • Linked publications#2 · top 13%

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

From SEC Form D filings
  • Bennett NemserDirectorNamed in SEC Form D filings
  • Bill CharltonExecutive OfficerNamed in SEC Form D filings
  • Chris EricksonDirectorNamed in SEC Form D filings
  • Erica NemserExecutive Officer, DirectorNamed in SEC Form D filings
  • Guido RadaelliDirectorNamed in SEC Form D filings
  • Tony SunDirectorNamed in SEC Form D filings

What it has protected

USPTO · 10 granted of 40
  • PendingCarbon Dioxide Separation Membranes And ProcessUSPTOApplication 19240427
  • PendingIntegrated Membrane Separation UnitUSPTOApplication 19104049
  • GrantedCarbon Dioxide Separation Membranes And ProcessUSPTOUS 12,370,502
Show all 40 patent records
  • Carbon Dioxide Separation Membranes And ProcessApr 9, 2026 · Application 19240427Pending
  • Integrated Membrane Separation UnitMar 19, 2026 · Application 19104049Pending
  • Carbon Dioxide Separation Membranes And ProcessJul 29, 2025 · US 12,370,502Granted
  • Humidification And Selective Permeation ModuleJul 15, 2025 · US 12,357,948Granted
  • Method For Humidifying Facilitated-transport MembranesJan 30, 2025 · Application 18913519Pending
  • Method For Humidifying Facilitated-transport MembranesNov 26, 2024 · US 12,151,212Granted
  • Thin-film Composite Membranes Having Improved Adhesion Between Layers And Uses ThereofSep 12, 2024 · Application 18578397Pending
  • Fluorinated Copolymers Having Nitrogen Functionality And Uses ThereofAug 15, 2024 · Application 18560648Pending
  • Process Control For Membrane-based SeparationsJul 25, 2024 · Application 18294993Pending
  • Gas Permeable Fluoropolymers And IonomersFeb 20, 2024 · US 11,905,350Granted
  • Method For Removing Ethylene From Agricultural ProductsApr 27, 2023 · Application 17914152Pending
  • Processes For Separation Of Aromatic Compounds Using A Thin Film Composite MembraneMay 3, 2022 · US 11,318,423Granted
  • Durable Membranes For Separation Of Solutes From Organic SolventsJul 22, 2021 · Application 15734029Pending
  • Isomer Separation With Highly Fluorinated Polymer MembranesJul 13, 2021 · US 11,058,998Granted
  • Improved Membranes For Separating Alkenes From Other CompoundsJun 18, 2020 · Application 16613110Pending
  • Thin-film Composite Membrane And Processes For The Separation Of Alkenes From A Gaseous Feed MixtureMay 5, 2020 · US 10,639,591Granted
  • Amorphous Fluorinated Copolymer Gas Separation MembranesMar 24, 2020 · US 10,596,527Granted
  • Thin Film Composite Membranes For Separation Of Alkenes From AlkanesSep 3, 2019 · US 10,399,044Granted
  • Membrane Separation Of Olefin And Paraffin MixturesJul 24, 2018 · US 10,029,248Granted
  • Improved Process For Separation Of Alkenes From AlkanesMay 17, 2018 · Application 15573222Pending
  • Copolymer For Use In Alkene-alkane Separation MembranesApr 26, 2018 · Application 15573287Pending
  • Improved Membranes For Separation Of Alkenes From AlkanesApr 5, 2018 · Application 15573436Pending
  • Improved Membranes For Separation Of Alkenes From AlkanesMar 29, 2018 · Application 15573199Pending
  • Fluorinated Copolymers Having Nitrogen Functionality And Uses ThereofApplication 63188592Pending
  • Method For Removing Ethylene From Agricultural ProductsApplication PCTUS2021024269Pending
  • Gas Permeable Fluoropolymers And IonomersApplication PCTUS2020049917Pending
  • Humidification And Selective Permeation ModuleApplication PCTUS2020037866Pending
  • Method For Removing Ethylene From Agricultural ProductsApplication 63002015Pending
  • Humidification And Selective Permeation ModuleApplication 62928956Pending
  • Method For Humidifying Facilitated-transport MembranesApplication PCTUS2019053236Pending
  • Gas Permeable Fluoropolymers And IonomersApplication 62897931Pending
  • Carbon Dioxide Separation Membranes And ProcessApplication PCTUS2019024517Pending
  • Durable Membranes For Separation Of Solutes From Organic SolventsApplication PCTUS2019013553Pending
  • Durable Thin-film Laminar-composite Membranes And Processes For The Separation Of Alkenes From AlkanesApplication 62789276Pending
  • Method For Hydrating Facilitated-transport MembranesApplication 62737704Pending
  • Fluorinated Carbon Dioxide Separation Membranes And ProcessApplication 62737703Pending
  • Isomer Separation With Highly Fluorinated Polymer MembranesApplication 62723310Pending
  • Durable Membranes For Separation Of Solutes From Organic SolventsApplication 62681403Pending
  • Improved Membranes For Separating Alkenes From Other CompoundsApplication PCTUS2018033951Pending
  • Fluoropolymer Membrane Separation Of Acidic And Nonacidic GasesApplication 62649780Pending

Recent research by its founders

  • Techno-economic process optimization for a range of membrane performances: What provides real value for point-source carbon capture?202314 cites
  • Amorphous fluorinated copolymer gas separation membranes20230 cites
  • Processes for separation of aromatic compounds using a thin film composite membrane20230 cites

Related companies, and why

  • PHORESIS, INC.Similar federal contract value in Clean tech · null in contracts
  • IBACOS INCSimilar federal contract value in Clean tech · null in contracts
  • Algenol Biotech LLCSimilar federal contract value in Clean tech · null in contracts
  • Clear Comfort Water, LLCSimilar federal contract value in Clean tech · null in contracts
  • BLUUMBIO INCSimilar federal contract value in Clean tech · null in contracts
  • DioxycleSimilar federal contract value in Clean tech · null in contracts

Regulatory activity · Clean tech

Sector-level, not company-level

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 . SBIR and STTR awards through .