Patents
US 9562861 B2: Method of monitoring macrostickies in a recycling and paper or tissue making process involving recycled pulp
- Granted
- 2017-02-07
- Filed
- 2011-04-05 application 13079891
- Type
- Utility · 21 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A challenge in using recycled material in the papermaking process is the presence of hydrophobic organics with adhesive properties commonly known as “stickies.” Hydrophobic agglomerates can result in spots or defects in the final paper product or deposit on papermaking equipment resulting in poor runnability and downtime. Technologies for monitoring and controlling microstickies exist. However, a need exists for a technique to rapidly determine the size and content of macrostickies (diameter>100 microns) in recycled pulp process streams. The present invention is a device and method to perform real-time macrostickies and/or any visible hydrophobic particle analysis in an aqueous medium. Using the present invention, furnish quality can be monitored and treatment performance can be monitored and controlled. The technique is based on fluorescence image analysis to identify and count sticky particles as well as measure their size.
Source: PVGPATDIS, file of 2026-04-10 (ipg170207.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Nalco Company LLC 271 patents | US company or organization | Naperville, IL | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| William A. Von Drasek | Oak Forest, IL | 24 | PVGPATDIS, file of 2026-04-10 | |
| Brett Brotherson | Lisle, IL | 2 | PVGPATDIS, file of 2026-04-10 | |
| Sergey M. Shevchenko | Aurora, IL | 17 | PVGPATDIS, file of 2026-04-10 | |
| Michael J. Murcia | DeKalb, IL | 22 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01N | Investigating or analysing materials by determining their chemical or physical properties | G01N21/6486 | PVGPATDIS, file of 2026-04-10 |
| Y02W | Climate change mitigation technologies related to wastewater treatment or waste management | Y02W30/64 | 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 |
|---|---|---|---|---|---|
| 2017-11-01 | Assignment Assignment of assignor's interest | NALCO COMPANY LLC signed 2017-02-27 | ECOLAB USA INC. ST. PAUL, MN | 44347/104 | ECORSEXC, file of 2026-09-25 |
| 2017-09-20 | Name change Change of name | NALCO COMPANY signed 2015-12-29 | NALCO COMPANY LLC NAPERVILLE, IL | 43924/587 | ECORSEXC, file of 2026-09-25 |
| 2011-04-05 | Assignment Assignment of assignor's interest | BROTHERSON, BRETT signed 2011-04-04 MURCIA, MICHAEL J. signed 2011-04-04 SHEVCHENKO, SERGEY M. signed 2011-04-04 VON DRASEK, WILLIAM A. signed 2011-04-04 | NALCO COMPANY NAPERVILLE, IL | 26074/939 | 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.