Patents
US 8672584 B2: Drainage beads
- Granted
- 2014-03-18
- Filed
- 2011-08-29 application 13220134
- Type
- Utility · 27 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Polystyrene drainage beads having optimized shapes to provide increased specific gravity and void volume at a given bulk density. Expanded forms of such drainage beads may be used as a geosynthetic aggregate in pre-assembled drainage units. Such pre-assembled drainage units may be used as foundation drains, septic drainage fields, or for other applications.
Source: PVGPATDIS, file of 2026-04-10 (ipg140318.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| RAPAC 1 patents | US company or organization | Gallatin, TN | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Dennis W. Koerner | Memphis, TN | 14 | PVGPATDIS, file of 2026-04-10 | |
| Carl D. Ring | Memphis, TN | 11 | PVGPATDIS, file of 2026-04-10 | |
| Jonathan Browning Jackson | Collierville, TN | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E02B | Hydraulic engineering | E02B11/00 | PVGPATDIS, file of 2026-04-10 |
| E03F | Sewers; cesspools | E03F1/002 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T428/2982 | 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 |
|---|---|---|---|---|---|
| 2021-08-15 | Security interest Security interest Security interest | RING CONTAINER TECHNOLOGIES, LLC signed 2021-08-12 RAPAC, L.P. signed 2021-08-12 | BANK OF AMERICA, N.A. CHICAGO, IL | 57186/333 | PASDL, file of 2026-10-15 |
| 2021-08-15 | Release of security interest Release of security interest | BANK OF AMERICA, N.A. signed 2021-08-12 | RING CONTAINER TECHNOLOGIES, LLC OAKLAND, TN | 57181/38 | PASDL, file of 2026-10-15 |
| 2018-11-15 | Release of security interest Release of security interest | OR LENDING LLC, AS ADMINISTRATIVE AGENT signed 2018-11-14 | RING CONTAINER TECHNOLOGIES, LLC OAKLAND, TN RAPAC, L.P. OAKLAND, TN | 47517/911 | PASDL, file of 2026-10-15 |
| 2017-11-01 | Security interest Security interest First lien patent security agreement | RING CONTAINER TECHNOLOGIES, LLC signed 2017-10-31 RAPAC, L.P. signed 2017-10-31 | BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT CHICAGO, IL | 44649/14 | PASDL, file of 2026-10-15 |
| 2017-11-01 | Security interest Security interest Second lien security agreement | RING CONTAINER TECHNOLOGIES, LLC signed 2017-10-31 RAPAC, L.P. signed 2017-10-31 | OR LENDING LLC, AS ADMINISTRATIVE AGENT NEW YORK, NY | 44347/225 | PASDL, file of 2026-10-15 |
| 2011-09-26 | Assignment Assignment of assignor's interest | KOERNER, DENNIS WAYNE signed 2011-08-23 JACKSON, JONATHAN BROWNING signed 2011-08-31 RING, CARL DAVID signed 2011-08-31 | RAPAC OAKLAND, TN | 26964/459 | 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.