What patent did Fujikura assert against Sterlite?

Fujikura claimed patent EP3796060 covering aspects of Sterlite's Celesta cable family. The Technical Board of Appeal revoked it entirely.

Why is the decision non-appealable?

Under European patent law, the Technical Board of Appeal's ruling is final. No further appeal is possible, giving Sterlite legal certainty.

What are the financial implications for Sterlite?

Sterlite avoided potential damages and an injunction. It can now sell Celesta cables without restrictions. The company is also seeking to recover its legal costs from Fujikura, though no specific amount was disclosed.

Did Sterlite previously disclose this litigation?

Yes, Sterlite intimated the infringement proceedings in December 2025. This update reports the conclusive resolution.

Cables · Large cap

Sterlite wins patent fight over Celesta cables

European Patent Office revokes Fujikura's patent in non-appealable decision, ending UK infringement case. Sterlite now seeks legal cost recovery.

— 2 earlier stories on Sterlite Technologies Ltd. →

STLTECH By Tipsheet Editorial 3 Jul 2026 · 7:22 PM IST Verify on BSE · NSE

Mkt cap₹29,942 cr

ROE0.00%

Debt / eq.0.91

1 Patent revoked - non-appealable decision

What's new

Fujikura's patent EP3796060 revoked in full, non-appealable.
December 2025 infringement proceedings concluded.
Sterlite pursuing legal defence costs from Fujikura.

Why this matters

The ruling eliminates a legal overhang on a key product family. Sterlite can now sell Celesta cables without restriction, and the win reinforces its IP defence credibility - useful with a $1.11B AI data centre contract already booked.

What we're watching

Recovery of legal costs from Fujikura.
Impact on Celesta cable sales and new orders.
Any subsequent patent challenges from competitors.

The full read

Sterlite Technologies has cleared a legal hurdle for its Celesta cable family. The European Patent Office revoked Fujikura's patent EP3796060 in a non-appealable decision, ending the UK infringement case that began in December 2025. It's a clean win. The ruling means no damages and no injunction, so Sterlite sells its cables freely. The company is now going after its legal costs from Fujikura. For a company with ₹1,441 cr in quarterly sales and a ₹29,942 cr market cap, this removes a legal distraction without causing a dramatic price swing. Still, it confirms Sterlite's IP defence is credible; a useful asset with a $1.11B AI data centre contract already in hand.

Questions answered

What patent did Fujikura assert against Sterlite?: Fujikura claimed patent EP3796060 covering aspects of Sterlite's Celesta cable family. The Technical Board of Appeal revoked it entirely.
Why is the decision non-appealable?: Under European patent law, the Technical Board of Appeal's ruling is final. No further appeal is possible, giving Sterlite legal certainty.
What are the financial implications for Sterlite?: Sterlite avoided potential damages and an injunction. It can now sell Celesta cables without restrictions. The company is also seeking to recover its legal costs from Fujikura, though no specific amount was disclosed.
Did Sterlite previously disclose this litigation?: Yes, Sterlite intimated the infringement proceedings in December 2025. This update reports the conclusive resolution.

Mentioned: Fujikura · European Patent Office · Celesta cable

Primary source BSE · NSE · Tijori

An independent reading of the company's own disclosure — the primary filing above is the final word.

Company snapshot

Sterlite Technologies Ltd.

Engineering & Capital Goods

₹29,912 cr

P/E 534.15×

Latest quarter · Mar 2026

Sales₹1,441 cr

Net profit₹59 cr

Op. margin+13.5%

EPS₹1.20

Strength & growth

Debt / equity0.91×

Current ratio0.91×

Sales CAGR+7.8%

EPS CAGR−11.2%

Story so far

All notes on STLTECH →

3 Jul 2026 · 7:22 PM IST Sterlite wins patent fight over Celesta cables
16d ago CRISIL lifts Sterlite Tech outlook to Stable, reaffirms AA- rating
42d ago Sterlite Technologies bags $1.11B AI data center contract