Patents
US 9267745 B2: Composite heat spreader containing synthetic graphite sheet and compressed graphite layer joined without adhesive
- Granted
- 2016-02-23
- Filed
- 2011-09-20 application 13818116
- Type
- Utility · 15 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A composite heat spreader (10) having an in-plane thermal conductivity of greater than 600 W/m*K and a thickness of greater than 50 microns, the composite heat spreader including a first element (20) which includes at least one sheet of compressed particles of exfoliated graphite having a density of at least about 1.4 grams/cc; and a second element (30) which includes at least one sheet of synthetic graphite having a density of at least 1.8 grams/cc and an in-plane thermal conductivity of at least 700 W/m*K, where the first element and the second element are joined into a composite sheet without the use of adhesives.
Source: PVGPATDIS, file of 2026-04-10 (ipg160223.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| GrafTech International Holdings Inc. 65 patents | US company or organization | Independence, OH | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| John L. Southard, II | Norton, OH | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| F28F | Details of heat-exchange and heat-transfer apparatus, of general application | F28F21/02 | PVGPATDIS, file of 2026-04-10 |
| B32B | Layered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form | B32B18/00 | PVGPATDIS, file of 2026-04-10 |
| C04B | Lime, magnesia; slag; cements; compositions thereof, e.g. mortars, concrete or like building materials; artificial stone ; ceramics ; refractories; treatment of natural stone | C04B35/522 | PVGPATDIS, file of 2026-04-10 |
| H01L | Semiconductor devices not covered by class h10 | H01L23/373 | PVGPATDIS, file of 2026-04-10 |
| H10W | Generic packages, interconnections, connectors or other constructional details of devices covered by class h10 | H10W40/25 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T156/1007 | 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 |
|---|---|---|---|---|---|
| 2023-02-01 | Release of security interest Release of security interest | WELLS FARGO BANK, NATIONAL ASSOCIATION signed 2023-01-31 | NEOGRAF SOLUTIONS, LLC LAKEWOOD, OH | 62972/634 | PASDL, file of 2026-10-15 |
| 2023-01-31 | Security interest Security interest Security interest | NEOGRAF SOLUTIONS, LLC signed 2023-01-31 | GLADSTONE CAPITAL CORPORATION MCLEAN, VA | 62571/858 | PASDL, file of 2026-10-15 |
| 2023-01-31 | Security interest Security interest Security interest | NEOGRAF SOLUTIONS, LLC signed 2023-01-31 | GCG INVESTORS V, L.P., AS AGENT CHICAGO, IL | 62568/36 | PASDL, file of 2026-10-15 |
| 2017-09-13 | Security interest Security interest Security agreement | NEOGRAF SOLUTIONS, LLC signed 2017-09-12 | WELLS FARGO BANK, NATIONAL ASSOCIATION NEW YORK, NY | 43843/582 | PASDL, file of 2026-10-15 |
| 2017-07-26 | Name change Change of name | ADVANCED ENERGY TECHNOLOGIES LLC signed 2017-07-18 | NEOGRAF SOLUTIONS, LLC NEW YORK, NY | 43336/472 | PASDL, file of 2026-10-15 |
| 2017-07-06 | Release of security interest Release of security interests recorded at reel/frames 013463/0360, 024678/0830, 014357/0075, and 035839/0754 | JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT FKA MORGAN GUARANTY TRUST COMPANY OF NEW YORK signed 2017-07-03 | ADVANCED ENERGY TECHNOLOGIES LLC AS ASSIGNEE OF GRAFTECH INTERNATIONAL HOLDINGS INC. FKA ADVANCED ENERGY TECHNOLOGY INC. FKA GRAFTECH INC. INDEPENDENCE, OH | 43099/502 | PASDL, file of 2026-10-15 |
| 2017-06-21 | Correction Corrective assignment to correct the incorrect appl. no. 14/771,229 previously recorded at reel: 040647 frame: 0534. assignor(s) hereby confirms the assignment. | GRAFTECH INTERNATIONAL HOLDINGS INC. signed 2016-09-30 | ADVANCED ENERGY TECHNOLOGIES LLC INDEPENDENCE, OH | 42938/856 | ECORSEXC, file of 2026-09-25 |
| 2016-11-18 | Assignment Assignment of assignor's interest | GRAFTECH INTERNATIONAL HOLDINGS INC. signed 2016-09-30 | ADVANCED ENERGY TECHNOLOGIES LLC INDEPENDENCE, OH | 40647/534 | ECORSEXC, file of 2026-09-25 |
| 2015-06-10 | Security interest Security interest Security agreement | FIBER MATERIALS INC. signed 2015-05-22 GRAFTECH INTERNATIONAL HOLDINGS INC. signed 2015-05-22 | JPMORGAN CHASE BANK N.A., AS COLLATERAL AGENT NEW YORK, NY | 35839/754 | ECORSEXC, file of 2026-09-25 |
| 2013-02-21 | Assignment Assignment of assignor's interest | SOUTHARD, JOHN L., II signed 2013-02-13 | GRAFTECH INTERNATIONAL HOLDINGS INC. PARMA, OH | 29846/519 | 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.