Patents
US 7678721 B2: Low dielectric glass fiber
- Granted
- 2010-03-16
- Filed
- 2006-10-26 application 11586789
- Type
- Utility · 36 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A glass fiber having a low dielectric constant and low dielectric loss tangent consists essentially of by weight, as a glass composition, 52 to 60% of SiO2, 11 to 16% of Al2O3, 20 to 30% of B2O3, and 4 to 8% of CaO, and substantially no MgO, substantially no Li2O, substantially no Na2O, substantially no K2O, and substantially no Ti2O. The glass fiber also may contain up to 2% F2 by weight. The glass fiber is ideal for use as reinforcement for printed wiring boards, and has excellent dielectric properties at frequencies of about 18 GHz or higher.
Source: PVGPATDIS, file of 2026-04-10 (ipg100316.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 |
|---|---|---|---|---|
| Douglas S. Boessneck | Aiken, SC | 1 | PVGPATDIS, file of 2026-04-10 | |
| J. Ronald Gonterman | Cub Run, KY | 1 | PVGPATDIS, file of 2026-04-10 | |
| Oleg A. Prokhorenko | Saint Petersburg, RU | 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 | C03C13/00 | PVGPATDIS, file of 2026-04-10 |
| D04H | Making textile fabrics, e.g. from fibres or filamentary material ; fabrics made by such processes or apparatus, e.g. felts, non-woven fabrics; cotton-wool; wadding ; ; non-woven fabrics from staple fibres, filaments or yarns, bonded with at least one web-like material during their consolidation | D04H1/4218 | PVGPATDIS, file of 2026-04-10 |
| H05K | Printed circuits; casings or constructional details of electric apparatus; manufacture of assemblages of electrical components | H05K1/0366 | 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 |
| 2007-02-13 | Assignment Assignment of assignor's interest | BOESSNECK, DOUGLAS S. signed 2006-12-15 GONTERMAN, J. RONALD signed 2007-01-08 PROKHORENKO, OLEG A. signed 2007-01-19 | AGY HOLDING CORP. AIKEN, SC | 18885/836 | 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.