Proton Energy Systems INC
Doing business as Nel Hydrogen US
At a glance
Employees100-499
In business sinceNot reported
Industry
HeadquartersWallingford, CT
US patents80
SAM.gov UEIHXVYJL2C8DY8
CAGE code1UZE7
Incorporated inDE
Supplier designations
For Profit OrganizationManufacturer of Goods
Self-certified by the company in its SAM.gov registration
Patents
80 US patents granted 1999–2020, none of them in the five years to SEP 2025, including 1 design patent.
Electrical machinery, apparatus, energy 53Surface technology, coating 13Measurement 4Chemical engineering 3Control 2
- Membrane electrode assembly and method of making the sameUS 10,700,373 · granted JUN 30, 2020
- Electrochemical cellUS 10,273,586 · granted APR 30, 2019
- Thermal management system for regenerative fuel cells and method thereofUS 7,981,556 · granted JUL 19, 2011
- System for monitoring the health of electrical generators and method thereofUS 7,888,124 · granted FEB 15, 2011
- System for maintaining hydrogen purity in electrical generators and method thereofUS 7,879,613 · granted FEB 1, 2011
Newest 5 shown · Granted to Proton Energy Systems, INC. · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0
Their plants
2 FACILITIES| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| Proton Energy Systems INC | Wallingford | CT | 100–499 | ACTIVE |
| 317720157 - Proton Energy Systems INC | Corvallis | OR | — | UNVERIFIED |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.