Patents
US 9297111 B1: Methods for the manufacture of cellulose nanocrystals
- Granted
- 2016-03-29
- Filed
- 2014-03-13 application 14208759
- Type
- Utility · 25 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Embodiments of the present invention relates generally to methods and systems for the manufacture of cellulose nanocrystals. In one embodiment, a method for manufacturing cellulose nanocrystals comprises reacting lignocellulosic fibers with sulfuric acid in water, introducing a water-insoluble solvent to substantially terminate the reaction, separating a first stream comprising at least 70% of the unreacted sulfuric acid in the water-insoluble solvent from a second stream comprising a plurality of cellulose nanocrystals and the remainder of the unreacted sulfuric acid in water, and separating the cellulose nanocrystals from the second stream.
Source: PVGPATDIS, file of 2026-04-10 (ipg160329.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 |
|---|---|---|---|---|
| Bruno Marcoccia | Charlotte, NC | 12 | PVGPATDIS, file of 2026-04-10 | |
| Michael J. Edwards | Waxhaw, NC | 35 | PVGPATDIS, file of 2026-04-10 | |
| Marvin Duncan Cooper | Bennettsville, SC | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| D21C | Production of cellulose by removing non-cellulose substances from cellulose-containing materials; regeneration of pulping liquors; apparatus therefor | D21C9/004 | PVGPATDIS, file of 2026-04-10 |
| C01B | Non-metallic elements; compounds thereof; ; metalloids or compounds thereof not covered by subclass c01c | C01B17/903 | PVGPATDIS, file of 2026-04-10 |
| C08B | Polysaccharides; derivatives thereof | C08B15/08 | PVGPATDIS, file of 2026-04-10 |
| C13K | Saccharides obtained from natural sources or by hydrolysis of naturally occurring disaccharides, oligosaccharides or polysaccharides | C13K1/04 | 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 | D21H11/18 | 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 |
| 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 |
| 2016-02-17 | Assignment Assignment of assignor's interest | DOMTAR CORPORATION signed 2015-12-03 | DOMTAR PAPER COMPANY, LLC FORT MILL, SC | 37754/197 | ECORSEXC, file of 2026-09-25 |
| 2016-02-17 | Assignment Assignment of assignor's interest | MARCOCCIA, BRUNO signed 2015-05-08 COOPER, MARVIN DUNCAN signed 2015-05-13 EDWARDS, MICHAEL signed 2015-05-15 | DOMTAR CORPORATION MONTREAL | 37753/919 | 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.