What the 76-Patent Dataset Actually Contains
The corpus under review comprises 76 patents and academic publications spanning 2005 to 2023 — and its dominant theme is not high-entropy alloys but printed electronics: functional inks, conductive materials, and related deposition processes. None of the sources directly address high-entropy alloy materials or their applications in extreme environments such as aerospace, nuclear, or high-temperature industrial settings. Understanding what this dataset does contain is therefore the essential starting point for any research team attempting to map this technology space.
The technical approaches in the dataset centre on three broad clusters: graphene-based conductive inks and their processing routes; two-dimensional (2D) material heterostructures for flexible and wearable electronics; and metal nanoparticle formulations — particularly silver and copper — for sintered conductive traces. A fourth, emerging cluster covers bio-based and sustainable ink systems. Researchers working on high-entropy alloys for extreme environments should note this divergence and consider supplementary targeted searches focused specifically on HEA compositions, processing methods, and aerospace or nuclear applications.
The 76-source corpus analysed here contains no patents or literature directly addressing high-entropy alloys for extreme environment applications. The analysis that follows documents the actual technological landscape represented in those sources: printed electronics, functional inks, and conductive materials spanning 2005–2023.
Graphene-Based Conductive Inks: The Dominant IP Category
Graphene-based conductive inks represent the most mature and heavily patented technology category in the dataset, with multiple deposition methods — inkjet, screen, gravure, and electrohydrodynamic printing — covered across a portfolio of Vorbeck Materials Corporation filings. The central IP claim across these patents covers printed electronic devices comprising substrates with applied layers of electrically conductive ink containing functionalized graphene sheets and binders.
A sustainable graphene ink produced using the non-toxic solvent Dihydrolevoglucosenone (Cyrene) achieved conductivity of 7.13 × 10⁴ S m⁻¹, making it suitable for wireless connectivity antennas operating from MHz to tens of GHz frequencies.
The most striking conductivity benchmark in the dataset comes from a 2018 study demonstrating an environmentally sustainable production route using Dihydrolevoglucosenone — commercially known as Cyrene — as the primary solvent. This non-toxic approach achieved a conductivity of 7.13 × 10⁴ S m⁻¹, a figure sufficient for wireless connectivity antenna applications across a broad MHz-to-GHz frequency range. The significance for the broader research community is that sustainability and performance need not be in tension: this route avoids hazardous solvents while delivering commercially relevant conductivity.
“Conductivity of 7.13 × 10⁴ S m⁻¹ — achieved with a non-toxic, bio-derived solvent — demonstrates that sustainable graphene ink formulations can meet the performance demands of wireless connectivity and IoT antenna applications.”
An alternative water-based route, reported in 2019, uses electrochemical exfoliation to produce printable graphene concentrations of approximately 2.25 mg mL⁻¹ in under five hours. The resulting flakes contain more than 75% single- and few-layer graphene — a quality metric directly relevant to electrical performance. This rapid production timeline represents a meaningful advantage over chemical vapour deposition routes and positions electrochemical exfoliation as a scalable pathway for industrial ink manufacturing, as researchers publishing in Nature-indexed journals have increasingly noted.
Explore the full patent landscape for graphene conductive inks and functional materials with PatSnap Eureka.
Search Patents in PatSnap Eureka →Two-Dimensional Materials and Printed Heterostructures
Beyond graphene, the dataset documents substantial progress in two-dimensional materials for printed electronic applications — particularly molybdenum disulfide (MoS₂) and hexagonal boron nitride (h-BN) — which together enable fully inkjet-printed complementary logic circuits on flexible and even textile substrates. A 2017 study demonstrated fully inkjet-printed 2D-material active heterostructures combining graphene and hexagonal-boron nitride inks to fabricate flexible, washable field-effect transistors directly on textile substrates.
Inkjet-printed n-type MoS₂ field-effect transistors have been demonstrated with air-stable, low-voltage operation and estimated switching times of approximately 4.1 μs, enabling complementary logic circuits when combined with p-type organic semiconductors.
The switching speed benchmark for MoS₂ printed transistors — approximately 4.1 μs — reported in 2021 is a meaningful data point for anyone assessing whether printed 2D-material circuits can approach the performance of mainstream organic electronics. According to standards bodies such as IEEE, switching speed is among the most critical performance parameters for logic circuit integration, making this result significant for the field.
Heterostructures in this context are devices built by stacking distinct two-dimensional materials — such as graphene (conductor), hexagonal boron nitride (dielectric), and MoS₂ (semiconductor) — in precise layered sequences. When inkjet-printed rather than grown by vapour deposition, they enable flexible, low-cost fabrication on substrates including paper and textiles.
A 2021 study on inkjet-printed low-dimensional materials on paper substrates pushed this further, demonstrating logic gates and basic sequential networks fabricated using combinations of MoS₂, hexagonal boron nitride, and carbon nanotubes — achieving performance the authors described as comparable to mainstream organic technology. Paper as a substrate is significant: its biodegradability and recyclability align directly with the sustainability agenda that the 2023 review of sustainable inks identifies as the sector’s most pressing research priority. For a broader perspective on global materials standards and environmental classifications, organisations such as OECD track critical raw material designations that are directly relevant to the ink materials landscape.
Metal-Based Ink Systems: Silver, Copper, and Composite Approaches
Silver nanoparticle inks represent the highest-volume commercial product in the functional ink market — the best-established example of nanotechnology at commercial scale in printed electronics, according to a 2016 state-of-the-art review in the dataset. This position reflects both the electrical performance of silver and the relative maturity of nanoparticle synthesis and ink formulation know-how compared with carbon-based alternatives.
Silver nanoparticle-based inks represent the highest sales volumes in the functional ink market and are identified as the best example of commercial nanotechnology in printed electronics, according to a 2016 state-of-the-art review.
The molecular ink approach patented by Her Majesty the Queen in Right of Canada (through the Communications Research Centre Canada) and commercialised with E2IP Technologies Inc. takes a distinct route: flake-less printable compositions comprising 30–60 wt% of C8–C12 silver carboxylate or 5–75 wt% copper formate complexes with polymeric binders and organic solvents. The absence of pre-formed nanoparticles or flakes is notable — these molecular inks sinter upon heating to form metallic traces, avoiding particle-related stability and agglomeration issues that affect conventional nanoparticle suspensions. Intellectual property offices including EPO and the Canadian Intellectual Property Office hold pending filings from this collaboration.
Graphene-silver composite inks occupy a middle ground: they address the conductivity limitations of pure graphene inks while reducing the silver loading requirements compared with pure silver nanoparticle systems. The 2019 study on inkjet-printed graphene-silver composite inks on textiles demonstrates this approach for wearable electronics applications, where both flexibility and electrical performance are critical constraints.
The dataset evidences three parallel IP strategies for silver-based printed electronics: (1) pure silver nanoparticle inks as the volume commercial standard; (2) molecular silver carboxylate inks (30–60 wt% C8–C12 silver carboxylate) that sinter into traces without pre-formed particles; and (3) graphene-silver composites that reduce silver loading while maintaining wearable-grade conductivity.
Map silver nanoparticle ink patent ownership and identify white space in functional ink IP with PatSnap Eureka.
Analyse IP with PatSnap Eureka →Sustainable and Bio-Based Ink Formulations: An Emerging IP Frontier
Sustainability is the most rapidly developing research theme in the dataset, driven by regulatory pressure to eliminate materials classified as critical raw materials and to enable end-of-life recyclability for electronic devices. A 2023 comprehensive review in the corpus frames this explicitly: the need for biobased, biodegradable materials that are not classified as critical raw materials is identified as the enabling condition for truly sustainable electronic manufacturing.
Forest-based materials present one of the most tangible near-term opportunities. Research published in 2020 demonstrates a process in which cellulose and lignin-based inks are screen-printed onto substrates and converted to conductive graphitic carbon through laser processing — achieving sheet resistance as low as 3.8 Ω/sq. This result is significant: it demonstrates that agricultural or forestry byproducts can be converted into functional electronic materials without high-vacuum deposition equipment.
Cellulose and lignin-based inks screen-printed onto substrates and converted to conductive graphitic carbon through laser-induced graphitisation achieved sheet resistance as low as 3.8 Ω/sq, establishing forest-derived materials as a viable route to sustainable printed electronics.
Paper substrates are also gaining traction as alternatives to conventional plastic films. A 2022 study on shellac-paper composites identifies biodegradability, recyclability, and roll-to-roll manufacturing compatibility as the primary advantages — while acknowledging that the porous microstructure of paper requires surface treatment to prevent ink wicking. This tension between substrate accessibility and print quality defines the core engineering challenge for paper-based printed electronics, a field that organisations such as WIPO track as part of broader green technology patent initiatives.
The Cyrene-based graphene ink route (discussed in Section 2) is part of this same sustainability trend: the deliberate selection of a non-toxic, bio-derived solvent rather than conventional N-methyl-2-pyrrolidone (NMP) or dimethylformamide (DMF) reflects the regulatory direction of travel across the electronics manufacturing sector.
Key Players and the Competitive Patent Landscape
Vorbeck Materials Corporation dominates the patent landscape in this dataset with over 15 related filings across US, EP, and IN jurisdictions spanning 2009 to 2020 — the widest multi-jurisdictional graphene printed electronics portfolio in the corpus. Their IP centres on printed electronic devices with functionalized graphene sheet conductive ink layers applied across the full range of commercially relevant deposition methods.
Four other organisations hold notable positions in the dataset:
- Guangzhou Chinaray Optoelectronic Materials Ltd. — formulations for printed optoelectronic devices incorporating quantum dots and organic functional materials (patent filed 2023).
- Her Majesty the Queen in Right of Canada / E2IP Technologies Inc. — molecular ink compositions for sintered metal traces; pending patent filings in EP and CA jurisdictions.
- DST Innovations Limited — printable functional materials for plastic electronics including organic light-emitting devices (2016 filing).
- Academic and national laboratory researchers — responsible for the majority of the 2D material heterostructure and sustainable ink publications in the dataset.
The geographic spread of Vorbeck’s filings — US, EP, and IN — signals a deliberate commercialisation strategy targeting the three largest printed electronics manufacturing and consumption markets. For IP strategists, the gap between Vorbeck’s corporate portfolio and the largely academic 2D materials and sustainable ink literature represents a potential window: much of the most technically advanced printed electronics research from 2017–2023 remains without strong corporate patent protection. For comprehensive patent landscaping and white space analysis in functional materials, the PatSnap IP Intelligence platform offers jurisdiction-level coverage across all major patent offices.