Patents
US 9783454 B2: High strength glass composition and fibers
- Granted
- 2017-10-10
- Filed
- 2010-12-22 application 12976261
- Type
- Utility · 22 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Glass compositions and high-modulus, and high-strength glass fibers made therefrom, being capable of economical, continuous processing and suitable for the production of high-strength and/or high stiffness, low-weight composites, such as windturbine blades, the glass composition comprises the following constituents in the limits defined below, expressed as weight percentages: between about 56 to about 61 weight percent SiO2; between about 16 to about 23 weight percent Al2O3, wherein the weight percent ratio of SiO2/Al2O3 is between about 2 to about 4; between about 8 to about 12 weight percent MgO; between about 6 to about 10 weight percent CaO, wherein the weight percent ratio of MgO/CaO is between about 0.7 to about 1.5; between about 0 to about 2 weight percent Na2O; less than about 1 weight percent Li2O; and total residual transition metal oxides of less than about 2 weight percent.
Source: PVGPATDIS, file of 2026-04-10 (ipg171010.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 | C03C13/00 | PVGPATDIS, file of 2026-04-10 |
| C08J | Working-up; general processes of compounding; after-treatment not covered by subclasses c08b, c08c, c08f, c08g or c08h | C08J5/08 | 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 |
| 2013-05-13 | Release of security interest Release of security interest | BANK OF AMERICA, N.A., AS AGENT signed 2012-06-15 | AGY HOLDING CORP. AIKEN, SC AGY AIKEN LLC AIKEN, SC AGY HUNTINGDON LLC AIKEN, SC | 30405/327 | PASDL, file of 2026-10-15 |
| 2011-03-09 | Security interest Security interest Security agreement | AGY HOLDING CORP. signed 2011-03-08 | BANK OF AMERICA, N.A. BOSTON, MA | 25920/217 | PASDL, file of 2026-10-15 |
| 2010-12-22 | Assignment Assignment of assignor's interest | HAUSRATH, ROBERT L. signed 2010-12-21 LONGOBARDO, ANTHONY V. signed 2010-12-21 | AGY HOLDING CORPORATION AIKEN, SC | 25765/340 | ECORSEXC, file of 2026-09-25 |
| 2010-12-22 | Assignment Assignment of assignor's interest | HAUSRATH, ROBERT L. signed 2010-12-21 LONGOBARDO, ANTHONY V. signed 2010-12-21 | AGY HOLDING CORPORATION AIKEN, SC | 25721/776 | 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.