Patents
US 12043915 B2: Electropolishing of MP35N wire for fatigue life improvement of an implantable lead
- Granted
- 2024-07-23
- Filed
- 2020-10-05 application 17062746
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
MP35N (35% Co, 35% Ni, 20% Cr, 10% Mo, by weight) wires (solid and clad) are widely used for leads in cardiac rhythm management (CRM) and neurological electrical stimulation devices. Over the typical lifetime of a CRM device, a lead wire is subjected to stress cycling imposed by the heartbeat and is expected to survive 300 million stress cycles, or more. Premature fatigue fracture of a lead is sometimes caused by surface imperfections in the wire that has been coiled into the lead. The imperfections can result in concentration of stresses at a specific location on the wire surface. A vexing type of imperfection is a tiny surface fissure that is commonly referred to as a chevron. Wire drawing processes that are commonly used to form wires for manufacturing an implantable lead inherently produce a distribution of tiny chevrons on the wire surface. According to the present invention, removing chevrons and other surface imperfections using an electropolishing process helps reduce or eliminate premature fatigue failure initiated by such surface imperfection.
Source: PVGPATDIS, file of 2026-04-10 (ipg240723.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Lake Region Manufacturing, Inc. 30 patents | US company or organization | Chaska, MN | LAKE REGION MANUFACTURING, INC. State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Roger C. Dickenson | Roanoke, VA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Wendy Hodges | Roanoke, VA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Jonathan Hardy | Roanoke, VA | 38 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C25F | Processes for the electrolytic removal of materials from objects; apparatus therefor | C25F3/16 | PVGPATDIS, file of 2026-04-10 |
| A61N | Electrotherapy; magnetotherapy; radiation therapy; ultrasound therapy | A61N1/048 | 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 |
|---|---|---|---|---|---|
| 2021-09-10 | Security interest Security interest Security interest | GREATBATCH LTD. signed 2021-09-02 ELECTROCHEM SOLUTIONS, INC. signed 2021-09-02 LAKE REGION MEDICAL, INC. signed 2021-09-02 LAKE REGION MANUFACTURING, INC. signed 2021-09-02 | WELLS FARGO BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT ROANOKE, VA | 57468/56 | PASDL, file of 2026-10-15 |
| 2020-10-05 | Assignment Assignment of assignor's interest | DICKENSON, ROGER C. signed 2020-10-01 HARDY, JONATHAN signed 2020-10-01 HODGES, WENDY signed 2020-10-01 | LAKE REGION MANUFACTURING, INC. CHASKA, MN | 53973/269 | 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.