Patents
US 12332163 B1: System for, and calibration and testing of directed beam ellipsometer systems
- Granted
- 2025-06-17
- Filed
- 2021-09-30 application 17300687
- Type
- Utility · 21 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Systems for and methodology of calibration, as well as testing of beam directing Ellipsometer systems which utilize polarized electromagnetic radiation to investigate samples.
Source: PVGPATDIS, file of 2026-04-10 (ipg250617.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| J.A. WOOLLAM CO., INC. 108 patents | US company or organization | Lincoln, NE | J.A. WOOLLAM CO., INC. State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Ping He | Lincoln, NE | 84 | PVGPATDIS, file of 2026-04-10 | |
| Martin M. Liphardt | Lincoln, NE | 78 | PVGPATDIS, file of 2026-04-10 | |
| Galen L. Pfeiffer | Roca, NE | 29 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01N | Investigating or analysing materials by determining their chemical or physical properties | G01N21/211 | 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 |
|---|---|---|---|---|---|
| 2022-04-19 | Assignment Assignment of assignor's interest | HE, PING signed 2021-09-17 LIPHARDT, MARTIN M. signed 2021-09-20 PFEIFFER, GALEN L signed 2021-09-23 | J.A. WOOLLAM CO., INC. LINCOLN, NE | 60801/841 | 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.