Patents
US 10351574 B2: Pharmaceutically acceptable salts and polymorphic forms of hydrocodone benzoic acid enol ester and processes for making same
- Granted
- 2019-07-16
- Filed
- 2017-10-12 application 15730885
- Type
- Utility · 6 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Compositions comprising hydrocodone benzoic acid enol ester to form novel prodrugs including hydrocodone benzoic acid enol ester salts, and various polymorphs. Also provided are processes for the preparation of hydrocodone benzoic acid enol ester salts, and various polymorphs.
Source: PVGPATDIS, file of 2026-04-10 (ipg190716.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| KEMPHARM, INC. 57 patents | US company or organization | Four Corners, FL | KEMPHARM, INC Form D issuer EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Travis Mickle | Winter Garden, FL | 83 | PVGPATDIS, file of 2026-04-10 | |
| Sven Guenther | Coralville, IA | 63 | PVGPATDIS, file of 2026-04-10 | |
| Christal Mickle | Coralville, IA | 18 | PVGPATDIS, file of 2026-04-10 | |
| Guochen Chi | North Liberty, IA | 41 | PVGPATDIS, file of 2026-04-10 | |
| Jaroslaw Kanski | Blacksburg, VA | 30 | PVGPATDIS, file of 2026-04-10 | |
| Andrea K. Martin | Fincastle, VA | 30 | PVGPATDIS, file of 2026-04-10 | |
| Bindu Bera | Blacksburg, VA | 29 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C07D | Heterocyclic compounds | C07D489/04 | PVGPATDIS, file of 2026-04-10 |
| A61K | Preparations for medical, dental or toiletry purposes | A61K31/485 | PVGPATDIS, file of 2026-04-10 |
| C07B | General methods of organic chemistry; apparatus therefor | C07B2200/13 | 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 |
|---|---|---|---|---|---|
| 2026-03-13 | Release of security interest Release of security interest | ALTER DOMUS (US) LLC signed 2026-03-12 | ZEVRA THERAPEUTICS, INC. CELEBRATION, FL | 75080/907 | PASDL, file of 2026-10-15 |
| 2024-04-08 | Security interest Security interest Security interest | ZEVRA THERAPEUTICS, INC. signed 2024-04-05 | ALTER DOMUS (US) LLC CHICAGO, IL | 67040/637 | PASDL, file of 2026-10-15 |
| 2024-02-23 | Name change Change of name | KEMPHARM, INC. signed 2023-02-21 | ZEVRA THERAPEUTICS, INC. CELEBRATION, FL | 66664/108 | PASDL, file of 2026-10-15 |
| 2019-03-25 | Correction Corrective assignment to correct the assignee address previously recorded at reel: 048387 frame: 0656. assignor(s) hereby confirms the assignment. | GUENTHER, SVEN signed 2019-01-16 MICKLE, CHRISTAL signed 2019-01-16 MICKLE, TRAVIS signed 2019-01-16 KANSKI, JAROSLAW signed 2019-01-17 MARTIN, ANDREA K. signed 2019-01-22 BERA, BINDU signed 2019-01-24 CHI, GUOCHEN signed 2019-01-25 | KEMPHARM, INC. CELEBRATION, FL | 48691/373 | ECORSEXC, file of 2026-09-25 |
| 2019-02-20 | Assignment Assignment of assignor's interest | GUENTHER, SVEN signed 2019-01-16 MICKLE, CHRISTAL signed 2019-01-16 MICKLE, TRAVIS signed 2019-01-16 KANSKI, JAROSLAW signed 2019-01-17 MARTIN, ANDREA K. signed 2019-01-22 BERA, BINDU signed 2019-01-24 CHI, GUOCHEN signed 2019-01-25 | KEMPHARM, INC., CELEBRATION, FL | 48387/656 | 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.