Patents
US 12692332 B2: Oleophobic fluoropolymers and filter materials prepared therefrom
- Granted
- 2026-07-28
- Filed
- 2022-06-22 application 17847088
- Type
- Utility · 12 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
The disclosure provides an improved process for preparing oleophobic fluoropolymers. The resulting fluropolymers were found to be effective in imparting hydrophobic and oleophobic properties to porous polymeric membranes such as PTFE. The treated PTFE membrane can reach an oleophobic level of 6 or above, (according to the AATCC-118-1997 oil repellency test method) with a low air flux loss.
Source: PTBLXML, file of 2026-07-28 (ipgb20260728.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Entegris, Inc. 666 patents | US company or organization | Billerica, MA | ENTEGRIS, INC. Federal lobbying client EXACT high confidence: identical full name and state ENTEGRIS INC SEC filer EXACT medium confidence: identical full name, one of each nationally | PTBLXML, file of 2026-07-28 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Mei Feng He | Hangzhou, CN | PTBLXML, file of 2026-07-28 | ||
| Dongzhu Wu | Hangzhou, CN | 4 | PTBLXML, file of 2026-07-28 | |
| Yunjia Xia | Hangzhou, CN | PTBLXML, file of 2026-07-28 | ||
| Kwok-Shun Cheng | Nashua, NH | 17 | PTBLXML, file of 2026-07-28 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C08F | Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds | C08F214/182 | PTBLXML, file of 2026-07-28 |
| B01D | Separation | B01D67/0088 | PTBLXML, file of 2026-07-28 |
| C08K | Use of inorganic or non-macromolecular organic substances as compounding ingredients | C08K5/14 | PTBLXML, file of 2026-07-28 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2023-06-02 | Security interest Security interest Security interest | ENTEGRIS, INC. signed 2023-06-01 CMC MATERIALS LLC signed 2023-06-01 | MORGAN STANLEY SENIOR FUNDING, INC., AS COLLATERAL AGENT BALTIMORE, MD | 63857/199 | PASDL, file of 2026-10-15 |
| 2023-01-03 | Assignment Assignment of assignor's interest | HE, MEI FENG signed 2022-12-13 WU, DONGZHU signed 2022-12-15 XIA, YUNJIA signed 2023-01-03 CHENG, KWOK-SHUN signed 2023-01-03 | ENTEGRIS, INC. BILLERICA, MA | 62260/127 | PASDL, file of 2026-08-13 |
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.