This inventor holds 1 USPTO granted patent and 3 published patent applications and 2 EPO patents. Top assignees: Metal Trade Overseas Ag, Northvolt Ab. Active years: 2026.
Company Filing History:
1 out of 1 
1 out of 16 Years Active: 2026
Title: Ulla Lassi - Innovator in Battery Technology
Introduction
Ulla Lassi is a notable inventor based in Kempele, Finland. She has made significant contributions to the field of battery technology, particularly in the preparation of battery-grade metal sulfate solutions. Ulla has worked with companies such as Northvolt AB and Metal Trade Overseas AG, where she has collaborated with talented individuals like Cornelia Lantto and Tom Niemi.
Latest Patent Applications
Ulla Lassi's patent application titled "Process for Preparing Battery Grade Metal Sulphate Solutions" outlines a method for producing battery-grade metal sulfate solutions directly from electrolytically produced metal objects, such as cathode plates. This innovative process involves subjecting these objects to an aqueous leaching solution that contains at least one acid leaching agent and a liquid oxidizing agent. The process is conducted in a continuous manner at elevated temperatures and with vigorous mixing. Additionally, the application discloses a leaching arrangement that includes a leaching column or reaction vessel.
Conclusion
Ulla Lassi's work in battery technology showcases her innovative spirit and dedication to advancing the field. Her contributions, particularly in the preparation of battery-grade metal sulfate solutions, highlight her potential as an influential inventor in the industry.