Solid-solid separation of carbon from a hardly soluble alkaline earth sulfate
US-2026094889-A1 · Apr 2, 2026 · US
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John Petra patents
John Petra is listed as an inventor on 4 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | John Petra |
| Total patents | 4 |
| First publication | Sep 28, 2017 |
| Latest publication | Apr 2, 2026 |
Notable patents
Publications ranked by popularity score, then publication date.
Magnetic separation of particles supported by specific surfactants
US-2025276328-A1 · Sep 4, 2025 · US
Concentrate quality
US-10807100-B2 · Oct 20, 2020 · US
Improvement of concentrate quality
US-2017274389-A1 · Sep 28, 2017 · US
Recent patents
Latest publications not already listed above.
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Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Basf Se | 4 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| B03C2201/18 | 4 |
| B03C1/01 | 3 |
| Y02P10/20 | 3 |
| C22B34/34 | 1 |
| C22B3/22 | 1 |