Patents
US 8231660 B2: System and method for facet fixation
- Granted
- 2012-07-31
- Filed
- 2009-08-19 application 12543656
- Type
- Utility · 8 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A spinal fixation element includes a screw and a washer. The screw comprises an elongated body of a first diameter and the body includes a threaded portion at a distal end and a semispherical head of a second diameter at a proximal end. The second diameter is larger than the first diameter. The washer comprises a semispherical through opening of a third diameter at the top, of a fourth diameter in the middle and of a fifth diameter at the bottom. The third diameter is slightly smaller than the second diameter, the fourth diameter is slightly larger than the second diameter and the fifth diameter is smaller than the second diameter. The washer surrounds the semispherical head, is non-removably attached to the semispherical head and is rotatable and positionable at an angle relative to the elongated body.
Source: PVGPATDIS, file of 2026-04-10 (ipg120731.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| SPINEFRONTIER, INC 25 patents | US company or organization | Beverly, MA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Kingsley R. Chin | Riviera Beach, FL | 46 | Person page FUZZY medium confidence | PVGPATDIS, file of 2026-04-10 |
| Christopher A. Chang | Beverly, MA | 10 | PVGPATDIS, file of 2026-04-10 | |
| Ernie Corrao | Bethel, CT | 21 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| A61B | Diagnosis; surgery; identification | A61B17/1757 | 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 |
|---|---|---|---|---|---|
| 2020-10-13 | Release of security interest Release of security interest | MIDCAP BUSINESS CREDIT LLC signed 2020-10-08 | SPINEFRONTIER, INC. MALDEN, MA | 54064/310 | PASDL, file of 2026-10-15 |
| 2020-10-07 | Correction Corrective assignment to correct the cover sheet. it wasrecorded as an assignment; however, it is a security interest. previously recorded on reel 037598 frame 0935. assignor(s) hereby confirms the patent security agreement. | SPINEFRONTIER, INC. signed 2015-12-29 | MIDCAP BUSINESS CREDIT LLC WEST HARTFORD, CT | 54001/506 | PASDL, file of 2026-10-15 |
| 2020-10-07 | Release of security interest Release of security interest | MIDCAP BUSINESS CREDIT LLC signed 2017-05-05 | SPINEFRONTIER, INC. MALDEN, MA | 53998/119 | PASDL, file of 2026-10-15 |
| 2020-10-05 | Assignment Assignment of assignor's interest | SPINEFRONTIER, INC signed 2019-07-01 | KIC VENTURES, LLC MALDEN, MA | 53972/737 | PASDL, file of 2026-10-15 |
| 2016-01-27 | Assignment Assignment of assignor's interest | SPINEFRONTIER, INC. signed 2015-12-29 | MIDCAP BUSINESS CREDIT LLC WEST HARTFORD, CT | 37598/935 | PASDL, file of 2026-10-15 |
| 2010-04-08 | Assignment Assignment of assignor's interest | CHIN, KINGSLEY R signed 2010-03-02 CHANG, CHRISTOPHER signed 2010-02-25 CORRAO, ERNIE signed 2010-02-08 | SPINEFRONTIER INC BEVERLY, MA | 24207/381 | PASDL, file of 2026-10-15 |
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.