Patents
US 12616981 B2: Systems and methods for fluid separation interface control using color-based optical measurements
- Granted
- 2026-05-05
- Filed
- 2023-01-12 application 18153473
- Type
- Utility · 17 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A fluid separation device includes a centrifugal separator configured to receive a centrifugal separation chamber of a disposable fluid flow circuit, a pump system configured to convey a fluid into the centrifugal separation chamber and to remove a separated fluid component from the centrifugal separation chamber via an outlet, a color-based interface monitoring system configured to determine an interface position between separated fluid components continuously flowing through the centrifugal separation chamber based on dominant wavelength measurements of layers of separated fluid components during a centrifugal separation procedure, and a controller configured to measure the dominant wavelengths of the layers, calculate a duration as a color time for each measured dominant wavelength, set target color times, calculate error signals and calculate control signals to adjust the pump system to control the flow rate and interface position.
Source: PTBLXML, file of 2026-05-05 (ipgb20260505.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Fenwal, Inc. 423 patents | US company or organization | Lake Zurich, IL | PTBLXML, file of 2026-05-05 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Benjamin E. Kusters | Pleasant Prairie, WI | 65 | PTBLXML, file of 2026-05-05 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B04B | Centrifuges | B04B11/02 | PTBLXML, file of 2026-05-05 |
| A61M | Devices for introducing media into, or onto, the body ; devices for transducing body media or for taking media from the body ; devices for producing or ending sleep or stupor | A61M1/3693 | PTBLXML, file of 2026-05-05 |
| G01N | Investigating or analysing materials by determining their chemical or physical properties | G01N13/00 | PTBLXML, file of 2026-05-05 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2023-06-26 | Assignment Assignment of assignor's interest | KUSTERS, BENJAMIN E. signed 2023-04-19 | FENWAL, INC. LAKE ZURICH, IL | 64057/863 | PASDL, file of 2026-10-15 |
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.