Patents
US 8728964 B2: Glass composition with low coefficient of thermal expansion, and glass fiber produced from same
- Granted
- 2014-05-20
- Filed
- 2012-01-11 application 13348073
- Type
- Utility · 17 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
The present disclosure relates to a glass composition having a low thermal expansion coefficient, specifically, a glass composition comprising about 55 to less than 64 weight percent of silicon oxide, about 15 to about 30 weight percent of aluminum oxide, about 5 to about 15 weight percent of magnesium oxide, about 3 to about 10 weight percent boron oxide, about 0 to about 11 weight percent calcium oxide, and about 0 to about 2 weight percent of alkali oxide, the remainder being trace compounds of less than about 1 weight percent, is provided. Glass fibers and composite articles formed therefrom are also provided.
Source: PVGPATDIS, file of 2026-04-10 (ipg140520.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 |
|---|---|---|---|---|
| Sudhendra V. Hublikar | Martinez, GA | 1 | PVGPATDIS, file of 2026-04-10 | |
| 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 | C03C3/091 | 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 |
| Y10T | Technical subjects covered by former us classification | Y10T428/24818 | 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 |
|---|---|---|---|---|---|
| 2020-09-21 | Release of security interest Release of security interest | WELLS FARGO BANK, NATIONAL ASSOCIATION signed 2020-09-21 | AGY HOLDING CORP. AIKEN, SC | 53836/520 | PASDL, file of 2026-10-15 |
| 2020-09-21 | Release of security interest Release of security interest | U.S. BANK NATIONAL ASSOCIATION signed 2020-09-21 | AGY HOLDING CORP. AIKEN, SC | 53836/470 | PASDL, file of 2026-10-15 |
| 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 |
| 2015-07-24 | Security interest Security interest Patent security agreement | AGY HOLDING CORP. signed 2015-05-22 | WELLS FARGO BANK, NATIONAL ASSOCIATION SANTA MONICA, CA | 36180/47 | PASDL, file of 2026-10-15 |
| 2015-06-26 | Correction Corrective assignment to correct the assignees' and assignor's name previously recorded on reel 035904 frame 0070. assignor(s) hereby confirms the release of security interest in patents. | UBS AG signed 2015-05-22 | AGY HOLDING CORP. AIKEN, SC AGY AIKEN LLC AIKEN, SC AGY PA OPERATIONS LLC F/K/A AGY HUNTINGDON LLC AIKEN, SC | 36080/313 | PASDL, file of 2026-10-15 |
| 2015-06-12 | Release of security interest Release of security interest in patents | AGY HOLDING CORP. signed 2015-05-22 AGY AIKEN LLC signed 2015-05-22 AGY PA OPERATIONS LLC F/K/A AGY HUNTINGDON LLC signed 2015-05-22 | UBS AG STAMFORD, CT | 35904/70 | PASDL, file of 2026-10-15 |
| 2015-06-10 | Release of security interest Release of security interest | UBS AG, STAMFORD BRANCH, AS AGENT signed 2015-05-22 | AGY HOLDING CORP. AIKEN, SC AGY AIKEN LLC AIKEN, SC AGY HUNTINGDON LLC AIKEN, SC | 35880/51 | PASDL, file of 2026-10-15 |
| 2013-07-01 | Security interest Security interest Patent security agreement | AGY HOLDING CORP. signed 2013-06-28 | U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT BOSTON, MA | 30744/838 | PASDL, file of 2026-10-15 |
| 2013-07-01 | Security interest Security interest Patent security agreement | AGY HOLDING CORP. signed 2013-06-28 | WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT BOSTON, MA | 30744/823 | PASDL, file of 2026-10-15 |
| 2013-05-13 | Security interest Security interest Security agreement | AGY HOLDING CORP. signed 2012-06-15 AGY AIKEN LLC signed 2012-06-15 AGY HUNTINGDON LLC signed 2012-06-15 | UBS AG, STAMFORD BRANCH, AS AGENT STAMFORD, CT | 30406/847 | PASDL, file of 2026-10-15 |
| 2012-10-03 | Assignment Assignment of assignor's interest | HUBLIKAR, SUDHENDRA V. signed 2010-12-21 HAUSRATH, ROBERT L. signed 2010-12-21 LONGOBARDO, ANTHONY V. signed 2010-12-21 | AGY HOLDING CORPORATION AIKEN, SC | 29067/286 | 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.