Patents
US 11441271 B2: Paper products and pulps with surface enhanced pulp fibers and increased absorbency, and methods of making same
- Granted
- 2022-09-13
- Filed
- 2019-02-05 application 16267755
- Type
- Utility · 8 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Paper products such as tissues can be made using a furnish comprising surface enhanced pulp fibers (“SEPF”). In some embodiments, SEPF have a weighted average fiber length of at least 0.3 millimeters (mm) and an average hydrodynamic specific surface area of at least 10 square meters per gram (m2/g). In some embodiments, a furnish or a paper product can comprise at least 2 % SEPF by dry weight. In some embodiments, a paper product comprising SEPF can be formed from a furnish having a freeness of 650 ml Canadian Standard Freeness (CSF) or less, optionally 600 ml CSF or less.
Source: PVGPATDIS, file of 2026-04-10 (ipg220913.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 | |
| Miami University 18 patents | US federal government | Oxford, OH | MIAMI UNIVERSITY Nonprofit EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Harshad Pande | Montréal, CA | 16 | PVGPATDIS, file of 2026-04-10 | |
| Douglas W. Coffin | Oxford, OH | 2 | PVGPATDIS, file of 2026-04-10 | |
| Mona Alinejad | Oxford, OH | 13 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| 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 | D21H11/10 | PVGPATDIS, file of 2026-04-10 |
| D21D | Treatment of the materials before passing to the paper-making machine | D21D1/00 | 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 |
|---|---|---|---|---|---|
| 2023-05-09 | Correction Corrective assignment to correct the second application number previously recorded at reel: 063504 frame: 0370. assignor(s) hereby confirms the assignment. | ALINEJAD, MONA signed 2022-06-09 COFFIN, DOUGLAS W. signed 2023-05-02 | MIAMI UNIVERSITY OXFORD, OH | 63580/893 | ECORSEXC, file of 2026-09-25 |
| 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 |
| 2022-11-04 | Correction Corrective assignment to correct the the assignor's fisrt name on the cover sheet (from harshand to harshad) previously recorded at reel: 060189 frame: 0951. assignor(s) hereby confirms the assignment. | PANDE, HARSHAD signed 2022-06-07 | DOMTAR PAPER COMPANY, LLC FORT MILL, SC | 61881/974 | ECORSEXC, file of 2026-09-25 |
| 2022-06-14 | Assignment Assignment of assignor's interest | PANDE, HARSHAND signed 2022-06-07 | DOMTAR PAPER COMPANY, LLC FORT MILL, SC | 60189/951 | ECORSEXC, file of 2026-09-25 |
| 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 |
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.