Zentek Granted U.S. Patent for ZenGUARD(TM) Graphene-Based Technology

Rhea-AI Summary

Zentek (NASDAQ: ZTEK) received U.S. Patent No. 12,616,206 for its foundational ZenGUARD(TM) graphene-based technology, including a 327-day term extension. The patent complements existing Canadian protection for ZenGUARD in PPE and HVAC uses, supporting products like ZenGUARD Enhanced Air Filters and strengthening Zentek’s broader IP portfolio.

Positive

• U.S. Patent No. 12,616,206 granted with 327-day term extension
• Patent complements existing Canadian ZenGUARD protection for PPE and HVAC
• Strengthens IP portfolio for ZenGUARD and Triera technology platforms
• Targets U.S. HVAC air filtration market estimated at US$5.3 billion in 2025
• Collaboration with U.S. manufacturer Quality Filters Inc. for potential market entry

Negative

• U.S. ZenGUARD market entry subject to EPA and other regulatory approvals
• Commercial readiness, manufacturing, distribution, and market acceptance risks highlighted
• No assurance provided on timing, scope, or commercial success of U.S. entry

News Market Reaction – ZTEK

-2.67%

3 alerts

-2.67% Session close to close

-9.8% Trough Tracked

$51.91M Market Cap

0.4x Rel. Volume

In the Jun 9 session, ZTEK declined 2.67%, reflecting a moderate negative market reaction. Argus tracked a trough of -9.8% from its starting point during tracking. Our momentum scanner triggered 3 alerts that day, indicating moderate trading interest and price volatility.

Data tracked by StockTitan Argus on the day of publication.

Market Context

This announcement highlights a U.S. patent grant for Zentek’s ZenGUARD™ graphene-based platform, inc...

Analysis

This announcement highlights a U.S. patent grant for Zentek’s ZenGUARD™ graphene-based platform, including a 327-day term extension, complementing existing Canadian protection. It reinforces prior steps: Canadian commercialization of ZenGUARD™ filters and ongoing Albany Graphite development. Key risks remain around U.S. regulatory clearance, manufacturing scale-up with Quality Filters Inc., and market adoption within the US$5.3 billion U.S. air filter market. Investors may watch for regulatory updates and initial U.S. sales indicators.

Key Figures

U.S. Patent Number: 12,616,206 Patent term extension: 327 days U.S. air filter market size: US$5.3 billion +1 more

4 metrics

U.S. Patent Number 12,616,206 U.S. patent covering ZenGUARD™ foundational graphene-based technology

Patent term extension 327 days Extension to enforceable term to compensate for examination delays

U.S. air filter market size US$5.3 billion Estimated size of U.S. air filter market in 2025

HVAC energy from filters 30% Share of HVAC energy consumption attributed to overcoming air filter resistance

Historical Context

5 past events · Latest: May 13 (Positive)

Pattern 5 events

Date	Event	Sentiment	24h Move	Catalyst
May 13	Federal procurement win	Positive	+16.5%	ZenGUARD™ filters added to Canada’s Pathway to Commercialization, enabling federal procurement.
May 06	Canadian commercialization update	Positive	+34.1%	Health Canada classification allowed Canadian commercial orders and supported broader ZenGUARD™ sales.
Apr 28	Environmental baseline program	Positive	+3.0%	Albany Graphite launched Year Two environmental and social baseline work with ERM and partners.
Apr 21	Graphite samples agreement	Positive	+3.8%	Albany Graphite engaged AETC for certified high-purity graphite samples and process engineering inputs.
Apr 16	Market research engagement	Positive	+4.4%	AppEco hired to conduct independent market and economic analysis for Albany Graphite’s PEA.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Pattern Detected

Recent operational and commercialization updates have typically seen positive price reactions, suggesting the market has often rewarded execution-focused news.

Recent Company History

Over the last few months, Zentek has announced multiple positive developments. In April–May 2026, ZenGUARD™ filters advanced from Canadian regulatory clarity to direct federal procurement access, with strong positive price reactions on May 6 and May 13. In parallel, Albany Graphite progressed toward a new PEA with environmental, technical, and market workstreams. Today’s U.S. patent for ZenGUARD™ fits this pattern of strengthening IP and commercialization foundations around its graphene-based platforms.

Key Terms

graphene-based, hvac, epa registration, u.s. patent and trademark office

4 terms

graphene-based technical

"covering the foundational graphene-based technology underlying the Company's ZenGUARD™ platform."

Graphene-based describes products or technologies that include graphene—a single-atom-thick sheet of carbon known for exceptional strength, electrical and thermal conductivity, and flexibility—woven into materials, components or processes. It matters to investors because adding graphene can boost performance, reduce weight or improve energy efficiency, potentially creating faster electronics, longer-lasting batteries or lighter materials; think of it as a powerful new ingredient that can upgrade existing products and open new markets.

hvac technical

"covering personal protective equipment and heating, ventilation and air conditioning ("HVAC") applications"

HVAC stands for heating, ventilation and air conditioning — the systems that control temperature, airflow and indoor air quality in buildings. Investors care because HVAC drives operating costs, energy use, tenant comfort and regulatory compliance; like the engine and insulation of a building, efficient modern systems can lower bills, reduce repair and replacement spending, and preserve property value, while outdated units can create unexpected expenses and vacancy risk.

epa registration regulatory

"The Company will continue evaluating U.S. regulatory requirements, including EPA registration,"

EPA registration is the U.S. Environmental Protection Agency’s formal approval that allows a pesticide, disinfectant, or similar chemical product to be marketed and sold in the United States. It matters to investors because registration determines whether a product can reach customers, what claims and labeling are allowed, and the legal and compliance costs a company must bear—similar to a product needing a passport and license before it can be sold widely.

u.s. patent and trademark office regulatory

"the United States Patent and Trademark Office has issued U.S. Patent No. 12,616,206"

The U.S. Patent and Trademark Office is the federal agency that reviews and grants patents and registers trademarks, like a land office that issues official property deeds for inventions and brand names. For investors, its decisions matter because patents and trademarks can create legal protection and exclusive market rights that boost a company’s revenue potential, reduce competition, and change risk and valuation dynamics.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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U.S. Patent No. 12,616,206 granted to Zentek with 327-day term extension; complements issued Canadian patent covering ZenGUARD(TM) in HVAC and PPE applications.

Guelph, Ontario--(Newsfile Corp. - June 9, 2026) - Zentek Ltd. (TSXV: ZEN) (NASDAQ: ZTEK) ("Zentek" or the "Company") is pleased to announce that the United States Patent and Trademark Office has issued U.S. Patent No. 12,616,206 (the "Patent") covering the foundational graphene-based technology underlying the Company's ZenGUARD™ platform.

The Patent includes a 327-day extension to its enforceable term to compensate for examination delays. The Patent is owned by Zentek Ltd., with Dr. Seyyedarash Haddadi named as lead inventor alongside co-inventors. The Patent further strengthens the Company's intellectual property protection for ZenGUARD™, complementing its issued Canadian patent covering personal protective equipment and heating, ventilation and air conditioning ("HVAC") applications, including ZenGUARD™ Enhanced Air Filters, which the Company announced on May 6, 2026, are now available for sale in Canada.

U.S. Air Filtration Market

The U.S. is among the largest markets globally for HVAC air filtration and is several times the size of the Canadian market. The U.S. air filter market was estimated at approximately US$5.3 billion in 2025¹.

HVAC operations are a significant component of commercial building energy use, and industry estimates indicate approximately 30% of HVAC energy consumption is attributable to overcoming the resistance imposed by air filters². ZenGUARD™ Enhanced Air Filters are a graphene-based technology engineered to help address this problem by delivering enhanced air quality without imposing an energy penalty. The Company will continue evaluating U.S. regulatory requirements, including EPA registration, while working alongside its U.S. manufacturing and distribution partner, Quality Filters Inc., an established American air filter manufacturer headquartered in Robertsdale, Alabama, to potentially enter the U.S. market. Any such U.S. market entry remains subject to applicable regulatory requirements, commercial readiness, manufacturing and distribution considerations, market acceptance and other risks, and there can be no assurance that Zentek will enter the U.S. market, or as to the timing, scope or commercial success of any such entry.

The U.S. patent grant broadens Zentek's intellectual property portfolio across its graphene-based and advanced material platforms, which underpin the ZenGUARD™ and Triera businesses. Each issued patent extends both the duration and geographic scope of protection for technologies the Company is advancing toward commercialization.

Management Commentary

"The U.S. and Canadian patents now protect ZenGUARD™'s underlying graphene-based indoor air quality technology in our two priority geographies," said Mohammed (Moe) Jiwan, Chief Executive Officer of Zentek. "ZenGUARD™ was developed in response to a specific market need: air filtration that materially improves indoor air quality in commercial and institutional buildings without imposing an energy penalty. We will continue to advance ZenGUARD™ alongside Quality Filters Inc. as the U.S. regulatory pathway clarifies."

About Zentek Ltd.
Zentek Ltd. is a Canadian intellectual property development and commercialization company advancing a portfolio of graphene-enabled and advanced material technologies across clean air, next-generation materials, and critical minerals. The Company's core platforms are Albany Graphite, ZenGUARD™, and Triera. Albany is the Company's principal critical minerals asset and is advancing toward a Preliminary Economic Assessment targeted for completion in the Summer of 2026.

Forward-Looking Statements
This news release contains forward-looking statements. Since forward-looking statements address future events and conditions, by their very nature they involve inherent risks and uncertainties. Although Zentek believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue reliance should not be placed on such information, which only applies as of the date of this news release, and no assurance can be given that such events will occur in the disclosed time frames or at all. Zentek disclaims any intention or obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise, other than as required by law.

Neither the TSX Venture Exchange nor its Regulation Services Provider accepts responsibility for the adequacy or accuracy of this release.

References (public)

1. https://www.mordorintelligence.com/industry-reports/north-america-air-filter-market
2. https://cleanair.camfil.us/2025/03/19/hvac-engineers-resource-for-low-pressure-drop-air-filters/

For more information:
Mohammed (Moe) Jiwan
Chief Executive Officer, Zentek Ltd.
T: 416-709-8876
E: mjiwan2@zentek.com
W: www.zentek.com

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/300744

FAQ

What patent was granted to Zentek (NASDAQ: ZTEK) for ZenGUARD graphene technology in June 2026?

Zentek received U.S. Patent No. 12,616,206 covering its foundational ZenGUARD graphene-based technology. According to Zentek, this patent includes a 327-day term extension and enhances protection for ZenGUARD applications in indoor air quality, complementing an existing Canadian patent for PPE and HVAC uses.

How does the new U.S. ZenGUARD patent impact Zentek’s HVAC air filtration strategy (ZTEK)?

The U.S. ZenGUARD patent supports Zentek’s plans for HVAC air filtration products. According to Zentek, it complements Canadian protection for ZenGUARD Enhanced Air Filters and targets the U.S. air filter market, which was estimated at about US$5.3 billion in 2025.

What is the significance of the 327-day term extension on Zentek’s U.S. ZenGUARD patent?

The 327-day extension increases the enforceable term of Zentek’s U.S. Patent No. 12,616,206. According to Zentek, this adjustment compensates for examination delays and effectively lengthens the period during which the company can enforce its ZenGUARD graphene-based technology rights in the United States.

How is Zentek (ZTEK) planning potential ZenGUARD entry into the U.S. HVAC market?

Zentek is assessing U.S. regulatory requirements, including EPA registration, while working with Quality Filters Inc. According to Zentek, any U.S. entry for ZenGUARD Enhanced Air Filters depends on regulation, commercial readiness, manufacturing, distribution, and market acceptance, with no assurance on timing or success.

What role does Quality Filters Inc. play in Zentek’s ZenGUARD U.S. growth plans?

Quality Filters Inc., a U.S. air filter manufacturer, is Zentek’s manufacturing and distribution partner. According to Zentek, they are collaborating to potentially bring ZenGUARD Enhanced Air Filters to the U.S. market, subject to regulatory approvals, commercial readiness, and other operational considerations.

How do the U.S. and Canadian ZenGUARD patents support Zentek shareholders (ZTEK)?

The U.S. and Canadian patents expand IP protection for ZenGUARD’s indoor air quality technology in two priority markets. According to Zentek, each granted patent extends duration and geographic scope of protection for technologies the company is advancing toward commercialization across ZenGUARD and Triera businesses.