Patents
US 10775298 B1: Ellipsometer or polarimeter system having at least one rotating element which is driven by a motor comprising air bearing
- Granted
- 2020-09-15
- Filed
- 2019-05-06 application 16501596
- Type
- Utility · 11 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Ellipsometers and polarimeters and the like having at least one rotating element which is driven by a motor that comprises air bearings.
Source: PVGPATDIS, file of 2026-04-10 (ipg200915.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| J.A. WOOLLAM CO., INC. 108 patents | US company or organization | Lincoln, DE | 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 |
|---|---|---|---|---|
| Christopher D. Hassler | Crete, NE | 1 | PVGPATDIS, file of 2026-04-10 | |
| Galen L. Pfeiffer | Roca, NE | 29 | PVGPATDIS, file of 2026-04-10 | |
| Jeffrey S. Hale | Lincoln, NE | 17 | PVGPATDIS, file of 2026-04-10 | |
| Craig M. Herzinger | Lincoln, NE | 36 | PVGPATDIS, file of 2026-04-10 | |
| Brian D. Guenther | Lincoln, NE | 3 | PVGPATDIS, file of 2026-04-10 | |
| Brooks A. Hitt | Lincoln, NE | 2 | 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 |
| F16C | Shafts; flexible shafts; elements or crankshaft mechanisms; rotary bodies other than gearing elements; bearings | F16C32/0614 | PVGPATDIS, file of 2026-04-10 |
| G01J | Measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light; colorimetry; radiation pyrometry | G01J4/00 | 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 |
|---|---|---|---|---|---|
| 2020-02-14 | Assignment Assignment of assignor's interest | HALE, JEFFREY S. signed 2019-04-26 HASSLER, CHRISTOPHER D. signed 2019-04-26 HERZINGER, CRAIG M. signed 2019-04-26 HITT, BROOKS A. signed 2019-04-26 PFEIFFER, GALEN A. signed 2019-04-26 GUENTHER, BRIAN D. signed 2019-05-01 | J. A. WOOLLAM CO., INC. LINCOLN, NE | 52398/647 | 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.