Patents
US 10975499 B2: Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers
- Granted
- 2021-04-13
- Filed
- 2016-08-01 application 15225292
- Type
- Utility · 30 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Various embodiments of the present invention relate to surface enhanced pulp fibers, various products incorporating surface enhanced pulp fibers, and methods and systems for producing surface enhanced pulp fibers. Various embodiments of surface enhanced pulp fibers have significantly increased surface areas compared to conventional refined fibers while advantageously minimizing reductions in length following refinement. The surface enhanced pulp fibers can be incorporated into a number of products that might benefit from such properties including, for example, paper products, paperboard products, fiber cement boards, fiber reinforced plastics, fluff pulps, hydrogels, cellulose acetate products, and carboxymethyl cellulose products. In some embodiments, a plurality of surface enhanced pulp fibers have a length weighted average fiber length of at least about 0.3 millimeters and an average hydrodynamic specific surface area of at least about 10 square meters per gram, wherein the number of surface enhanced pulp fibers is at least 12,000 fibers/milligram on an oven-dry basis.
Source: PVGPATDIS, file of 2026-04-10 (ipg210413.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Domtar Paper Company LLC 21 patents | US company or organization | Fort Mill, SC | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Harshad Pande | Rue du Bois des Loges, CA | 16 | PVGPATDIS, file of 2026-04-10 | |
| Bruno Marcoccia | Charlotte, NC | 12 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| D01B | Mechanical treatment of natural fibrous or filamentary material to obtain fibres of filaments, e.g. for spinning | D01B9/00 | PVGPATDIS, file of 2026-04-10 |
| D02J | Finishing or dressing of filaments, yarns, threads, cords, ropes or the like | D02J3/02 | PVGPATDIS, file of 2026-04-10 |
| D21B | Fibrous raw materials or their mechanical treatment | D21B1/04 | PVGPATDIS, file of 2026-04-10 |
| D21C | Production of cellulose by removing non-cellulose substances from cellulose-containing materials; regeneration of pulping liquors; apparatus therefor | D21C9/007 | PVGPATDIS, file of 2026-04-10 |
| D21D | Treatment of the materials before passing to the paper-making machine | D21D1/06 | PVGPATDIS, file of 2026-04-10 |
| D21H | Pulp compositions; preparation thereof not covered by subclasses d21c or d21d; impregnating or coating of paper; treatment of finished paper not covered by class b31 or subclass d21g; paper not otherwise provided for | D21H11/00 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T428/298 | 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 |
|---|---|---|---|---|---|
| 2025-01-30 | Security interest Security interest Security interest | RESOLUTE FP US INC. signed 2025-01-28 EAM CORPORATION signed 2025-01-28 DOMTAR PAPER COMPANY, LLC signed 2025-01-28 | BANK MANDIRI (EUROPE) LIMITED, AS THE COLLATERAL AGENT LONDON | 70059/666 | PASDL, file of 2026-10-15 |
| 2023-03-01 | Security interest Security interest Term loan patent security agreement | DOMTAR PAPER COMPANY, LLC signed 2023-03-01 | COBANK, ACB, AS COLLATERAL AGENT GREENWOOD VILLAGE, CO | 62902/610 | PASDL, file of 2026-10-15 |
| 2021-12-01 | Security interest Security interest Security agreement (notes) | DOMTAR PAPER COMPANY, LLC signed 2021-11-30 EAM CORPORATION signed 2021-11-30 | THE BANK OF NEW YORK MELLON, AS COLLATERAL AGENT NEW YORK, NY | 58294/43 | PASDL, file of 2026-10-15 |
| 2021-12-01 | Security interest Security interest Security agreement (first lien) | DOMTAR PAPER COMPANY, LLC signed 2021-11-30 EAM CORPORATION signed 2021-11-30 | BARCLAYS BANK PLC, AS COLLATERAL AGENT NEW YORK, NY | 58293/941 | PASDL, file of 2026-10-15 |
| 2021-12-01 | Security interest Security interest Security agreement (abl) | DOMTAR PAPER COMPANY, LLC signed 2021-11-30 EAM CORPORATION signed 2021-11-30 | BARCLAYS BANK PLC, AS COLLATERAL AGENT NEW YORK, NY | 58293/927 | PASDL, file of 2026-10-15 |
| 2018-06-13 | Assignment Assignment of assignor's interest | DOMTAR CORPORATION signed 2015-02-23 | DOMTAR PAPER COMPANY, LLC FORT MILL, SC | 46068/907 | ECORSEXC, file of 2026-09-25 |
| 2018-06-13 | Assignment Assignment of assignor's interest | PANDE, HARSHAD signed 2013-08-07 MARCOCCIA, BRUNO signed 2013-08-22 | DOMTAR CORPORATION MONTREAL | 46067/737 | 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.