Patents
US 11806657 B2: Separation of particles of different surface energies through control of humidity
- Granted
- 2023-11-07
- Filed
- 2021-09-03 application 17467155
- Type
- Utility · 24 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An impact test apparatus can be used to determine particle interfacial energies with varying relative air humidity. It was observed that capillary condensation increased the adhesive forces of hydrophilic materials. A systems humidity separation window was identified and the differences in interfacial energy for a hydrophilic surface and for a hydrophobic surface can be exploited in order to achieve the separation of particles. Separation and concentration of particles, particularly particles within a mineral ore body, can be obtained.
Source: PVGPATDIS, file of 2026-04-10 (ipg231107.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| SOUTH DAKOTA BOARD OF REGENTS 87 patents | US company or organization | Pierre, SD | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Bernado Moreno Baqueiro Sansao | Salvador, BR | 1 | PVGPATDIS, file of 2026-04-10 | |
| Jon Kellar | Rapid City, SD | 8 | PVGPATDIS, file of 2026-04-10 | |
| William M. Cross, Jr. | Rapid City, SD | 23 | PVGPATDIS, file of 2026-04-10 | |
| Albert Romkes | Rapid City, SD | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B01D | Separation | B01D47/05 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2021-10-01 | Assignment Assignment of assignor's interest | CROSS, WILLIAM signed 2020-08-31 KELLAR, JON signed 2020-08-31 ROMKES, ALBERT signed 2020-08-31 SANSAO, BERNADO MORENO BAQUEIRO signed 2020-08-31 | SOUTH DAKOTA BOARD OF REGENTS PIERRE, SD | 57669/375 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.