Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Recovery of rare earth elements from sulphurous acid solution by solvent extraction

Recovery of rare earth elements from sulphurous acid solution by solvent extraction

US Patent 5015447 · Granted May 14, 1991

Estimated economic value: $11,490,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Electrophotographic photosensitive member, process cartridge, and electrophotogr2025
Brush having a higher contact pressure with an image bearing member at an upstre2025
Image forming apparatus2024
Marine vessel propulsion system, communication terminal, and keycode server2024
Image forming apparatus2024
Image-forming apparatus having charging potential control during non-image formi2024
Image forming apparatus2024
Electrophotographic photosensitive member, process cartridge, and electrophotogr2023
Developing apparatus, process cartridge, and image forming apparatus2023
Culture state determination based on direction-dependent image information2023
Image forming apparatus2023
Image forming apparatus2023