Patents
US 11739023 B2: Low dielectric glass composition, fibers, and article
- Granted
- 2023-08-29
- Filed
- 2020-02-17 application 16792658
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Glass compositions and glass fibers having low dielectric constants and low dissipation factors that may be suitable for use in electronic applications and articles are disclosed. The glass fibers and compositions of the present invention may include between 48.0 to 58.0 weight percent SiO2; between 15.0 and 26.0 weight percent B2O3; between 12.0 and 18.0 weight percent Al2O3; between greater than 0.25 and 3.0 weight percent P2O5; between greater than 0.25 and 7.00 weight percent CaO; 5.0 or less weight percent MgO; between greater than 0 and 1.5 weight percent SnO2; and 6.0 or less weight percent TiO2. Further, the glass composition has a glass viscosity of 1000 poise at a temperature greater than 1350 degrees Celsius and a liquidus temperature greater than 1000 degrees Celsius.
Source: PVGPATDIS, file of 2026-04-10 (ipg230829.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| AGY HOLDING CORPORATION 6 patents | US company or organization | Aiken, SC | AGY HOLDING CORPORATION Federal lobbying client EXACT high confidence: identical full name and state AGY HOLDING CORP. SEC filer FUZZY low confidence: same name (legal endings aside), one of each nationally AGY HOLDING CORP. State business registration FUZZY medium confidence: same name (legal endings aside) and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Robert Lurie Hausrath | Aiken, SC | 5 | PVGPATDIS, file of 2026-04-10 | |
| Anthony V. Longobardo | Johnston, SC | 5 | 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 | C03C13/006 | PVGPATDIS, file of 2026-04-10 |
| C03B | Manufacture, shaping, or supplementary processes | C03B37/02 | PVGPATDIS, file of 2026-04-10 |
| H05K | Printed circuits; casings or constructional details of electric apparatus; manufacture of assemblages of electrical components | H05K1/0306 | 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 |
|---|---|---|---|---|---|
| 2020-09-23 | Security interest Security interest Security interest | AGY HOLDING CORP. signed 2020-09-22 | WELLS FARGO BANK, NATIONAL ASSOCIATION SANTA MONICA, CA | 53851/816 | ECORSEXC, file of 2026-09-25 |
| 2020-09-21 | Security interest Security interest Security interest | AGY HOLDING CORP. signed 2020-09-03 | TCW ASSET MANAGEMENT COMPANY LLC NEW YORK, NY | 53836/429 | PASDL, file of 2026-10-15 |
| 2020-02-17 | Assignment Assignment of assignor's interest | HAUSRATH, ROBERT LURIE signed 2018-03-05 LONGOBARDO, ANTHONY VINCENT signed 2018-03-05 | AGY HOLDING CORPORATION AIKEN, SC | 51833/216 | 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.