Patents
US 12240957 B2: Method for fabricating impermeable porous particles
- Granted
- 2025-03-04
- Filed
- 2021-12-08 application 17545079
- Type
- Utility · 5 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method for preparing core/shell particles includes forming a suspension of ethylenically unsaturated monomer droplets containing one or more monomers and a porogen in an aqueous medium containing a first stabilizer and a polymerization initiator, wherein at least one of the monomers is a cross-linking monomer, and wherein the first stabilizer is an inorganic colloid. The method further includes polymerizing the one or more monomers to form core/shell particles having a core of a porous polymer and a polymeric shell having a shell thickness of at least 5 nm, wherein any pores in the polymeric shell have a diameter of less than 2 nm.
Source: PVGPATDIS, file of 2026-04-10 (ipg250304.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| EASTMAN KODAK COMPANY 2,417 patents | US company or organization | Rochester, NY | EASTMAN KODAK COMPANY Federal lobbying client EXACT high confidence: identical full name and state EASTMAN KODAK CO SEC filer 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 |
|---|---|---|---|---|
| Kevin D. Lofftus | Fairport, NY | 15 | PVGPATDIS, file of 2026-04-10 | |
| John L. Muehlbauer | Stafford, NY | 11 | PVGPATDIS, file of 2026-04-10 | |
| Mridula Nair | Penfield, NY | 81 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C08J | Working-up; general processes of compounding; after-treatment not covered by subclasses c08b, c08c, c08f, c08g or c08h | C08J9/365 | PVGPATDIS, file of 2026-04-10 |
| C09D | Coating compositions, e.g. paints, varnishes or lacquers; filling pastes; chemical paint or ink removers; inks; correcting fluids; woodstains; pastes or solids for colouring or printing; use of materials therefor | C09D5/022 | PVGPATDIS, file of 2026-04-10 |
| C08K | Use of inorganic or non-macromolecular organic substances as compounding ingredients | C08K7/22 | 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 |
|---|---|---|---|---|---|
| 2023-04-25 | Assignment Assignment of assignor's interest | NAIR, MRIDULA signed 2023-04-03 LOFFTUS, KEVIN D. signed 2023-04-20 MUEHLBAUER, JOHN LEONARD signed 2023-04-20 | EASTMAN KODAK COMPANY ROCHESTER, NY | 63425/928 | ECORSEXC, file of 2026-09-25 |
| 2022-03-22 | Security interest Security interest Security interest | EASTMAN KODAK COMPANY signed 2022-03-15 EASTMAN KODAK INTERNATIONAL CAPITAL COMPANY, INC. signed 2022-03-15 FAR EAST DEVELOPMENT LTD. signed 2022-03-15 KODAK (NEAR EAST), INC. signed 2022-03-15 KODAK AMERIACAS, LTD. signed 2022-03-15 KODAK PHILIPPINES, LTD. signed 2022-03-15 | BANK OF AMERICA, N.A. AS AGENT BOSTON, MA | 59336/405 | ECORSEXC, file of 2026-09-25 |
| 2021-12-08 | Assignment Assignment of assignor's interest | LOFFTUS, KEVIN D. signed 2021-12-07 MUEHLBAUER, JOHN LEONARD signed 2021-12-07 | EASTMAN KODAK COMPANY ROCHESTER, NY | 58381/510 | 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.