Patent US12679734: 3D Graphene Foam Across Four Industries

💡 Scotland's Integrated Graphene just secured U.S. Patent 12,679,734 for a laser-based process that converts ordinary plastic film into pure 3D graphene foam at atmospheric pressure - no vacuum chamber, no toxic chemistry, no transfer step. Granted on July 14, 2026, the patent covers the core method behind the company's Gii® platform, already supplying biosensor electrodes that outperform gold. That one process now bridges batteries, point-of-care diagnostics, green hydrogen electrolysis, and IoT sensors through a single scalable manufacturing route.

What the Patent Actually Claims: Writing Graphene with a Laser

Most people picture graphene as a flat, one-atom-thick sheet of carbon, the material that earned the 2010 Nobel Prize in Physics. Integrating that extraordinary material into real devices without breaking it, contaminating it, or making it unaffordably expensive has been the field's unsolved commercial problem for over a decade. Patent US 12,679,734, granted to Integrated Graphene Holding Limited on July 14, 2026, tackles that integration problem directly.

The core claim describes a method where a thin film of carbon-containing material, typically polyimide (the same material as Kapton® tape), 5 to 120 micrometres thick, is placed on the target substrate. A laser beam scans across it, heating the film locally to between 800°C and 1,030°C in nanoseconds. The carbon reorganises into a three-dimensional graphene foam: porous, highly conductive, and permanently bonded to the substrate. The whole process runs at ordinary atmospheric pressure. The resulting material carries at least 96% carbon purity, less than 1.2% oxygen, electrical conductivity between 10 and 100 siemens per centimetre, and average pore diameters of 4 to 10 nanometres. Those numbers are not marketing claims: they are the specification limits embedded in the patent's own claims, verifiable from the European counterpart EP3447026A1.

No vacuum chamber, no chemical vapour deposition reactor, no toxic precursor gases - and crucially, no separate transfer step. Conventional CVD graphene grows on copper foil inside a reactor and must be chemically transferred to the target device, a step that introduces cracks, wrinkles, and contamination. US 12,679,734 eliminates that problem by making the substrate the direct growth surface from the start. That structural insight is what nine years of patent prosecution was defending - and why the grant matters beyond a single product line.

The Problem It Solves: Why 2D Graphene Never Quite Scaled

Since the first graphene paper in 2004, the material's theoretical potential has been remarkable: the strongest material ever measured, extraordinary electrical and thermal conductivity, near-complete impermeability to most gases. Yet by 2026, commercial graphene remains largely a niche product. The reason is almost always manufacturing cost and integration difficulty.

Standard CVD produces high-quality graphene on copper foils inside vacuum chambers at around 1,000°C, but the subsequent etch-and-transfer process introduces defects and drives costs above what most applications can sustain. Reduced graphene oxide (rGO), made by oxidising graphite and then stripping the oxygen, is cheaper but structurally inferior: its conductivity is orders of magnitude below pure graphene, and its mechanical properties are significantly degraded. For most high-performance applications, rGO falls short; for most cost-sensitive applications, CVD is too expensive.

Integrated Graphene's laser approach sidesteps both routes. Polyimide film is an industry-standard material, cheap and available in rolls, compatible with roll-to-roll manufacturing. CO₂ and near-infrared lasers are standard industrial tools. The process runs in air on essentially any solid substrate: plastic, glass, metal, textile. The company built a process simultaneously purer than rGO, more scalable than CVD, and integrable into existing manufacturing lines. That gap is what Patent US 12,679,734 claims to fill - and it is why the patent took nine years to grant: the claims are broad, and broadly contested.

Structure as Superpower: Why 3D Beats Flat

The "3D" label points to the most important functional distinction between Gii® and conventional graphene products. A flat graphene sheet has two usable faces: top and bottom. A three-dimensional foam is an interconnected network of curved graphene walls enclosing pores averaging 4 to 10 nanometres, the mesoporous range optimal for both ion transport and molecular capture.

That porous architecture delivers dramatically more active surface area per unit footprint than any flat film. In batteries and supercapacitors, more active surface means higher capacity and faster charge/discharge cycles. In biosensors, more surface means more binding sites for biological molecules, translating directly to lower detection limits and faster response times. In electrolysers for green hydrogen, more surface means more catalyst contact area per gram of platinum or iridium, reducing precious-metal loading while improving current density. The 3D structure emerges naturally from the laser process: as the polyimide film is rapidly carbonised, volatile by-products, mainly CO₂ and CO from oxygen-containing groups in polyimide, push outward and create the foam architecture. The laser delivers the energy; the chemistry writes the structure. That self-organising quality is part of what makes the process commercially elegant.

Four Connection Points: How One Patent Spans Multiple Fields

Patent US 12,679,734 is unusual because a single manufacturing method patent covers applications across at least four distinct technology markets. That breadth is exactly what makes it strategically valuable.

Diagnostics and biosensors. Gii-Sens, Integrated Graphene's first commercial product, is an electrode platform for point-of-care human diagnostics. It replaces gold electrodes, which are expensive, supply-constrained, and limited in surface chemistry modifications, with 3D graphene electrodes achieving higher sensitivity at lower cost. Published research from 2024 confirms that combining Gii-Sens with single-step surface functionalisation enhances biosensor performance for glucose detection, pathogen assays, and other biomarker measurements. As personalised medicine shifts diagnostics out of central labs and into pharmacies, homes, and wearables, demand for cheap high-sensitivity sensing electrodes will scale sharply.

Energy storage. Graphene-enhanced battery anodes charge faster and cycle longer. Supercapacitors using 3D graphene electrodes bridge the power-energy gap: they deliver the rapid bursts needed for EV regenerative braking and renewable-grid buffering that chemical batteries alone cannot meet efficiently. The mesoporous pore range of Gii® is particularly well-suited to ion intercalation kinetics.

Green hydrogen. In PEM electrolysers that split water into hydrogen and oxygen, 3D graphene can serve as a catalyst support, increasing the active surface of platinum-group metals per gram of costly material. The patent's own claims explicitly cover fuel cell and electrolysis components, making this a direct IP stake in the hydrogen economy.

IoT sensors. Pressure, gas, humidity, and temperature sensors built on 3D graphene substrates outperform silicon MEMS when thin, flexible, or conformal form factors are required. Laser direct-write on plastic substrates opens manufacturing routes not available to rigid silicon. As billions of IoT nodes are deployed for industrial monitoring, smart buildings, and connected health, the sensor electrode market will be enormous. All four markets reinforce each other: better batteries require smarter management electronics, which need better sensors, which need better electrodes. Patent US 12,679,734 sits at that hub - and its commercial implications extend further than any single product line suggests.

Patent fact	Detail
Patent number	US 12,679,734
Title	3D graphene
Assignee	Integrated Graphene Holding Limited (Edinburgh, Scotland, UK)
Inventors	Claus Marquordt, Marco Caffio
Priority date	August 24, 2017 (UK)
US grant date	July 14, 2026
Jurisdiction	United States (USPTO)
Original assignee	RD Graphene Ltd (predecessor company)
Key claim	Laser converts polyimide film to 3D graphene on substrate at atmospheric pressure
Material purity	At least 96% carbon, at most 1.2% oxygen
Conductivity	10 to 100 S/cm
Pore diameter	4 to 10 nm (mesoporous)

The Company: Nine Years of Patient Building

Integrated Graphene was founded in 2016 in Edinburgh, Scotland, by Claus Marquordt (CEO, inventor) and Marco Caffio (co-founder, inventor), materials scientists with expertise in carbon nanomaterials and surface science. The original patent priority was filed under the company's predecessor name, RD Graphene Ltd, in August 2017. As the company developed its platform, it rebranded to Integrated Graphene, reflecting a shift from a single research product to a broader materials platform strategy. In 2023, the company announced a planned £8 million investment in scaling its high-volume graphene manufacturing process, a clear signal that the Gii® platform had graduated from proof-of-concept to commercial ramp-up.

The US patent grant in July 2026 closes the most important geographic gap in Integrated Graphene's IP portfolio. The US is the world's single largest market for diagnostics devices, IoT components, and advanced material inputs. Enforceable claims there, after nine years of prosecution, position the company to license its process, attract strategic partnerships with major electrode and battery manufacturers, or enforce against infringers. A companion PCT application confirms that European and Asian IP is being pursued in parallel, building a global perimeter around the laser-write process. The full IP wall is being built, jurisdiction by jurisdiction.

So What Does It Mean for Us?

Patent US 12,679,734 is ultimately a story about how a manufacturing insight - use a laser in air to do what everyone else does in expensive vacuum reactors - can unlock an entire materials platform. Graphene's properties have been known since 2004. The barrier was always production at commercial scale. Integrated Graphene's laser-write process removes that barrier in a way that is scalable, atmospheric, and substrate-agnostic. The US patent now gives the company a legal position to defend that removal across the world's most lucrative single market.

For the wider innovation landscape, two things are worth tracking. First, process patents on scalable manufacturing methods tend to be more durable competitively than material patents, because they control the production route, not just the output. Any company that tries to replicate Integrated Graphene's laser-written graphene process in the US market is now entering legally protected territory. Second, the multi-market architecture of the Gii® platform means this patent's commercial value could compound as each of the four addressable markets grows. A cautious forward read: execution risk remains - scaling advanced materials from hundreds of kilograms to tonnes while maintaining quality is always harder than it looks, and incumbent electrode suppliers have entrenched supply chains. But the IP foundation is now solid, the first commercial deployments are real, and the field connections run deep. Watch the partnership announcements over the next eighteen months.

FAQ

Sources

• EP3447026A1 - 3D graphene (European counterpart, full technical claims) - Google Patents (priority 2017)
• USPTO Patent Gazette Week 28, 2026 - Patentee Index
• Integrated Graphene launches 3D graphene foam - Graphene-Info (2022)
• Integrated Graphene to invest £8M in scaling up - The Manufacturer (2023)
• Gii-Sens functionalisation for biocatalytic devices - ScienceDirect (2024)

About the author

Dao Huy (Lucas) is a professional translator with over 7 years of experience in technical translation, patent translation, and IP documentation, working from English, Chinese, and French into Vietnamese. His work spans frontier fields including advanced materials patents, semiconductor documentation, and technology localization. As graphene platforms generate complex, multi-jurisdictional IP portfolios, precise patent translation of materials science claims - from laser parameters to pore structure specifications - is critical to protecting and enforcing rights across markets.

If you need accurate English to Vietnamese technical translation or IP translation for patents in advanced materials, clean energy, or any deep-tech field, contact Lucas for a quote at daohuy.com.