Patents
US 9468604 B2: Pharmaceutical compositions of dispersions of drug and neutral polymers
- Granted
- 2016-10-18
- Filed
- 2014-04-01 application 14242141
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
In one aspect, pharmaceutical compositions comprising dispersions of an acid-sensitive drug and a neutral dispersion polymer are disclosed. The acid-sensitive drug has improved chemical stability relative to dispersions of the drug and acidic polymers. In another aspect, pharmaceutical compositions of low-solubility drugs and amphiphilic, hydroxy-functional vinyl copolymers are disclosed.
Source: PVGPATDIS, file of 2026-04-10 (ipg161018.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Bend Reserch, Inc. 62 patents | US company or organization | Bend, OR | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Dwayne T. Friesen | Bend, OR | 38 | Person page FUZZY medium confidence | PVGPATDIS, file of 2026-04-10 |
| Michael Gumkowski | Old Lyme, CT | 3 | PVGPATDIS, file of 2026-04-10 | |
| Rodney James Ketner | Bend, OR | 8 | PVGPATDIS, file of 2026-04-10 | |
| Douglas Alan Lorenz | Bend, OR | 19 | PVGPATDIS, file of 2026-04-10 | |
| James A. S. Nightingale | Bend, OR | 15 | PVGPATDIS, file of 2026-04-10 | |
| Ravi M. Shanker | Groton, CT | 27 | PVGPATDIS, file of 2026-04-10 | |
| James B. West | Bend, OR | 3 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| A61K | Preparations for medical, dental or toiletry purposes | A61K9/1652 | 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 |
|---|---|---|---|---|---|
| 2014-04-07 | Assignment Assignment of assignor's interest | PFIZER INC. signed 2008-11-03 PFIZER PRODUCTS INC. signed 2008-11-04 | BEND RESEARCH, INC. BEND, OR | 32620/598 | ECORSEXC, file of 2026-09-25 |
| 2014-04-07 | Assignment Assignment of assignor's interest | NIGHTINGALE, JAMES A. S. signed 2001-07-26 KETNER, RODNEY JAMES signed 2001-07-30 FRIESEN, DWAYNE T. signed 2001-08-01 LORENZ, DOUGLAS A. signed 2001-08-01 WEST, JAMES B. signed 2001-08-03 SHANKER, RAVI M. signed 2001-08-15 GUMKOWSKI, MICHAEL J. signed 2001-08-20 | PFIZER INC. NEW YORK, NY PFIZER PRODUCTS INC. GROTON, CT | 32620/439 | 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.