Patents
US 10981828 B2: High strength class C fly ash cementitious compositions with controllable setting
- Granted
- 2021-04-20
- Filed
- 2019-08-20 application 16545012
- Type
- Utility · 24 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An embodiment includes a Class C fly ash (CFA) cementitious composition with a controllable setting time comprising at least one Class C fly ash; at least one alkali hydroxide; at least one source of phosphate; and water. Alternate embodiments include a Class C fly ash (CFA) cementitious composition with a solid activator comprising at least one Class C fly ash; at least one alkali carbonate; at least one source of phosphate; and water.
Source: PVGPATDIS, file of 2026-04-10 (ipg210420.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| The Catholic University of America 38 patents | US company or organization | Washington, DC | The Catholic University of America College or university EXACT high confidence: identical full name and state THE CATHOLIC UNIVERSITY OF AMERICA Federal lobbying client EXACT high confidence: identical full name and state CATHOLIC UNIVERSITY OF AMERICA Nonprofit FUZZY medium confidence: same name (governing-board words and legal endings aside) and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Weiliang Gong | Rockville, MD | 6 | PVGPATDIS, file of 2026-04-10 | |
| Hui Xu | Rockville, MD | 264 | PVGPATDIS, file of 2026-04-10 | |
| Werner Lutze | Bethesda, MD | 6 | PVGPATDIS, file of 2026-04-10 | |
| Ian L. Pegg | Alexandria, VA | 16 | Person page FUZZY high confidence | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C04B | Lime, magnesia; slag; cements; compositions thereof, e.g. mortars, concrete or like building materials; artificial stone ; ceramics ; refractories; treatment of natural stone | C04B7/243 | PVGPATDIS, file of 2026-04-10 |
| Y02P | Climate change mitigation technologies in the production or processing of goods | Y02P40/10 | PVGPATDIS, file of 2026-04-10 |
| Y02W | Climate change mitigation technologies related to wastewater treatment or waste management | Y02W30/91 | 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 |
|---|---|---|---|---|---|
| 2019-08-28 | Assignment Assignment of assignor's interest | LUTZE, WERNER signed 2019-08-23 PEGG, IAN L. signed 2019-08-23 GONG, WEILIANG signed 2019-08-26 XU, HUI signed 2019-08-26 | THE CATHOLIC UNIVERSITY OF AMERICA WASHINGTON, DC | 50198/528 | 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.