Patents
US 11608596 B2: Paper products subjected to a surface treatment comprising enzyme-treated surface enhanced pulp fibers and methods of making the same
- Granted
- 2023-03-21
- Filed
- 2020-03-26 application 16831582
- Type
- Utility · 17 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Methods of making a paper product can comprise forming a substrate from a first furnish that comprises a plurality of pulp fibers, at least partially dewatering the substrate, treating a second furnish that comprises a plurality of surface enhanced pulp fibers (SEPF) at least by adding one or more enzymes to the second furnish, and sizing the dewatered substrate at least by depositing the treated second furnish onto at least one of opposing first and second surfaces of the dewatered substrate. The SEPF can have a length weighted average fiber length that is greater than or equal to 0.20 millimeters (mm) and an average hydrodynamic specific surface area that is greater than or equal to 10 square meters per gram (m2/g).
Source: PVGPATDIS, file of 2026-04-10 (ipg230321.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 | |
| THE UNIVERSITY OF BRITISH COLUMBIA 508 patents | Foreign company or organization | Vancouver, CA | University of British Columbia College or university FUZZY low confidence: same name (legal endings aside), one of each nationally UNIVERSITY OF BRITISH COLUMBIA Nonprofit FUZZY low confidence: same name (legal endings aside), one of each nationally | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Harshad Pande | Fort Mill, SC | 16 | PVGPATDIS, file of 2026-04-10 | |
| Alexander Timothy Beam | Fort Mill, SC | 2 | PVGPATDIS, file of 2026-04-10 | |
| Mark Martinez | Vancouver, CA | 2 | PVGPATDIS, file of 2026-04-10 | |
| Jingqian Chen | Vancouver, CA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Miaoran Li | Vancouver, CA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Heather Trajano | Vancouver, CA | 1 | 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 | D21H11/20 | PVGPATDIS, file of 2026-04-10 |
| C12N | Microorganisms or enzymes; compositions thereof; propagating, preserving, or maintaining microorganisms; mutation or genetic engineering; culture media | C12N9/2405 | PVGPATDIS, file of 2026-04-10 |
| C12Y | Enzymes | C12Y302/01091 | 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 |
|---|---|---|---|---|---|
| 2023-03-01 | 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 |
| 2022-09-21 | Assignment Assignment of assignor's interest | CHEN, JINGQIAN signed 2022-09-06 LI, MIAORAN signed 2022-09-06 MARTINEZ, MARK signed 2022-09-06 TRAJANO, HEATHER signed 2022-09-06 | THE UNIVERSITY OF BRITISH COLUMBIA VANCOUVER, BRITISH COLUMBIA | 61171/442 | ECORSEXC, file of 2026-09-25 |
| 2022-09-21 | Assignment Assignment of assignor's interest | PANDE, HARSHAD signed 2022-08-22 BEAM, ALEX signed 2022-09-19 | DOMTAR PAPER COMPANY, LLC FORT MILL, SC | 61169/304 | 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.