Patents
US 7572747 B2: Optical glass
- Granted
- 2009-08-11
- Filed
- 2008-09-26 application 12238725
- Type
- Utility · 8 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An optical glass consisting essentially of B2O3 in an amount of 10-40 wt %, SiO2 in an amount less than or equal to 5 wt %, ZnO in an amount less than or equal to 15 wt %, SrO in an amount less than or equal to 9 wt %, ZrO2 in an amount less than or equal to 9 wt %, La2O3 in an amount of 15 to 45 wt %, BaF2 in an amount of 1 to 10 wt %, BaO in an amount less than or equal to 5 wt %, HfO2 in an amount of 0.1 to 7.5 wt %, Gd2O3 in an amount less than or equal to 16 wt %, CaO in an amount less than or equal to 7 wt %, ZrF4 in an amount less than or equal to 5 wt %, Na2O in an amount less than or equal to 2 wt % and Y2O3 in an amount less than or equal to 16 wt %. The optical glass has a glass transition temperature in a range of 500-670° C. and a refractive index (nd) in a range of 1.60 to 2.00.
Source: PVGPATDIS, file of 2026-04-10 (ipg090811.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Alfred University 3 patents | US company or organization | Alfred, NY | Alfred University College or university EXACT high confidence: identical full name and state ALFRED UNIVERSITY Federal lobbying client EXACT high confidence: identical full name and state ALFRED UNIVERSITY Nonprofit EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
| KYOCERA Corporation 5,684 patents | Foreign company or organization | Kirishima, JP | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Alexis G. Clare | Alfred Station, NY | 1 | PVGPATDIS, file of 2026-04-10 | |
| Tatsuji Furuse | Kagoshima, JP | 4 | PVGPATDIS, file of 2026-04-10 | |
| Matthew Hall | Alfred, NY | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C03C | Chemical composition of glasses, glazes or vitreous enamels; surface treatment of glass; surface treatment of fibres or filaments made from glass, minerals or slags; joining glass to glass or other materials | C03C3/068 | 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 |
|---|---|---|---|---|---|
| 2009-01-14 | Assignment Assignment of assignor's interest | CLARE, ALEXIS G. signed 2008-12-10 HALL, MATTHEW signed 2008-12-10 FURUSE, TATSUJI signed 2008-12-17 | ALFRED UNIVERSITY ALFRED, NY KYOCERA CORPORATION KIRISHIMA, KAGOSHIMA | 22105/168 | 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.