Patents
US 11766400 B2: Biodegradable contraceptive implants
- Granted
- 2023-09-26
- Filed
- 2017-10-24 application 16344663
- Type
- Utility · 17 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Biodegradable contraceptive implants and methods of making and using thereof, are preferably formed of poly(ω-pentadecalactone-co-p-dioxanone) [poly(PDL-co-DO)], a family of polyester copolymers that degrade slowly in the presence of water. The material is suitable as the basis of a biodegradable contraceptive implant that provides sustained release of a progestin at a rate similar to a commercially available nondegradable implant. In a preferred embodiment, the progestin is levonorgestrel (LNG), a hormone that prevents pregnancy by preventing the release of an egg from the ovary or by preventing fertilization of the egg by sperm. The implant may be inserted subcutaneously, allowing degradation over a period of up to about 18 or 24 months, eliminating the need for removal by a trained practitioner.
Source: PVGPATDIS, file of 2026-04-10 (ipg230926_r1.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Yale University 871 patents | US company or organization | New Haven, CT | Yale University College or university EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
| Family Health International 7 patents | US company or organization | Durham, NC | FAMILY HEALTH INTERNATIONAL Nonprofit EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| W. Mark Saltzman | New Haven, CT | 20 | PVGPATDIS, file of 2026-04-10 | |
| Elias Quijano | Durham, CT | 8 | PVGPATDIS, file of 2026-04-10 | |
| Fan Yang | Branford, CT | 38 | PVGPATDIS, file of 2026-04-10 | |
| Zhaozhong Jiang | New Haven, CT | 5 | PVGPATDIS, file of 2026-04-10 | |
| Derek Owen | Durham, NC | 3 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| A61K | Preparations for medical, dental or toiletry purposes | A61K9/0024 | PVGPATDIS, file of 2026-04-10 |
| A61P | Specific therapeutic activity of chemical compounds or medicinal preparations | A61P15/18 | 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 |
|---|---|---|---|---|---|
| 2019-05-01 | Assignment Assignment of assignor's interest | OWEN, DEREK signed 2017-10-24 | FAMILY HEALTH INTERNATIONAL DURHAM, NC | 49048/469 | ECORSEXC, file of 2026-09-25 |
| 2019-05-01 | Assignment Assignment of assignor's interest | YANG, FAN signed 2017-11-09 JIANG, ZHAOZHONG signed 2017-11-10 SALTZMAN, W. MARK signed 2018-02-05 QUIJANO, ELIAS signed 2018-07-12 | YALE UNIVERSITY NEW HAVEN, CT | 49048/399 | 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.