Location History:
- Calipatria, CA (US) (2004)
- El Centro, CA (US) (1984 - 2020)
Company Filing History:
23 out of 1,113 
5 out of 6 
3 out of 5 
Years Active: 1984-2025
Title: **Innovative Contributions of John L Featherstone in Lithium Recovery**
Introduction
John L Featherstone, based in El Centro, California, stands out as an influential inventor with a remarkable portfolio of 35 patents. His work primarily focuses on developing innovative processes for the extraction of valuable minerals, particularly lithium, from geothermal brines. Featherstone's contributions are vital in addressing the increasing demand for lithium, which is a key component in batteries and various technologies.
Latest Patents
Among his latest achievements is a groundbreaking patent titled "Process for recovery of lithium from a geothermal brine." This invention presents a sophisticated system and process designed for the sequential extraction of zinc, manganese, and lithium from brine found in the Salton Sea Known Geothermal Resource Area. The method encompasses an impurity removal circuit, followed by a Continuous Counter-Current Ion Exchange (CCIX) circuit that selectively recovers lithium chloride from the brine. Finally, the system includes a lithium chloride conversion circuit that translates lithium chloride into lithium carbonate or lithium hydroxide products, showcasing Featherstone's innovative approach to mineral recovery.
Career Highlights
Featherstone's professional journey includes significant roles at reputable companies such as the Union Oil Company of California and MidAmerican Energy Holdings Company. His work at these organizations has allowed him to sharpen his skills and contribute to the development of essential technological advancements in the mineral extraction industry.
Collaborations
Throughout his career, John L Featherstone has collaborated with other talented individuals, including Darrell L Gallup and Jessie P Reverente. These collaborations have enabled the exchange of ideas and expertise that foster innovative solutions in the field of mineral recovery and processing.
Conclusion
John L Featherstone's dedication to innovation and his extensive patent portfolio make him a key figure in the quest for sustainable lithium recovery. His ability to create systems that effectively extract valuable resources from geothermal brines underscores the importance of research and development in advancing technology. Featherstone's contributions not only enhance the field of mineral recovery but also play a pivotal role in the growing demand for renewable energy technologies.