Patents
US 11788304 B2: Electronically actuated leveling system for screeding concrete
- Granted
- 2023-10-17
- Filed
- 2019-09-10 application 16566095
- Type
- Utility · 17 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An apparatus for leveling a concrete screed having a frame and a screed head secured thereto includes a plurality of vertically adjustable leveling legs driven by a plurality of electrical actuators responsive to a command supplied by a user interface.
Source: PVGPATDIS, file of 2026-04-10 (ipg231017.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Ligchine International Corporation 15 patents | US company or organization | Floyds Knobs, IN | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Peter A. Ligman | Darien, WI | 16 | PVGPATDIS, file of 2026-04-10 | |
| Gary Ligman | Jeffersonville, IN | 5 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E04F | Finishing work on buildings, e.g. stairs, floors | E04F21/241 | PVGPATDIS, file of 2026-04-10 |
| E04G | Scaffolding; forms; shuttering; building implements or aids, or their use; handling building materials on the site; repairing, breaking-up or other work on existing buildings | E04G21/10 | PVGPATDIS, file of 2026-04-10 |
| E01C | Construction of, or surfaces for, roads, sports grounds, or the like; machines or auxiliary tools for construction or repair | E01C19/35 | 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 |
|---|---|---|---|---|---|
| 2019-10-01 | Assignment Assignment of assignor's interest | LIGMAN, PETER A. signed 2018-12-13 LIGMAN, GARY signed 2018-12-11 | LIGCHINE INTERNATIONAL CORPORATION FLOYDS KNOBS, IN | 50587/75 | 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.