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Method For Calcining Mineral Rock In A Vertical Right Furnace With Regenerative Parallel Flow And Furnace Used

Patent No. EP4324799 (titled "Method For Calcining Mineral Rock In A Vertical Right Furnace With Regenerative Parallel Flow And Furnace Used") was filed by Lhoist Recherche ET Developpement on Jun 28, 2021. The application was issued on Jan 15, 2025.

Patent Summary

A method for calcining mineral rock in a regenerative parallel flow vertical straight furnace that reduces CO2 emissions by recirculating a portion of the furnace exhaust gas, mixing it with concentrated oxygen, and reintroducing it into the combustion zone. The method also incorporates a heat exchange system to recover energy from the heated exhaust gas.

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Patent Family

Patent Oppositions (3)

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.

CompanyOpposition DateRepresentative
FELS WERKEOct 13, 2025MAIKOWSKI & NINNEMANN PATENTANWALTE PARTNERSCHAFT MBB
MAERZ OFENBAUOct 11, 2025THYSSENKRUPP
CARMEUSESep 29, 2025AWA BENELUX

Dossier Documents

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EP4324799

LHOIST RECHERCHE ET DEVELOPPEMENT
Application Number
EP23218123A
Filing Date
Jun 28, 2021
Status
Granted And Under Opposition
Dec 13, 2024
Publication Date
Jan 15, 2025
External Links
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