Patents
US 8258322 B2: Synthesis of hexahydrodibenzopyranones
- Granted
- 2012-09-04
- Filed
- 2009-08-28 application 12549919
- Type
- Utility · 12 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An improved process is provided for the synthesis of hexahydrodibenzo[b,d]pyran-9-ones, such as nabilone.
Source: PVGPATDIS, file of 2026-04-10 (ipg120904.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| WATSON LABORATORIES INC. 21 patents | US company or organization | Corona, CA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Valeriy Mikaylo | Toronto, CA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Subakar Paramanantham | Scarborough, CA | 2 | PVGPATDIS, file of 2026-04-10 | |
| Ilya Avrutov | Thornhill, CA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Martyn Brown | Toronto, CA | 7 | PVGPATDIS, file of 2026-04-10 | |
| Zemin Li | Toronto, CA | 2 | PVGPATDIS, file of 2026-04-10 | |
| Natalie Lazarowych | Toronto, CA | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C07D | Heterocyclic compounds | C07D311/80 | PVGPATDIS, file of 2026-04-10 |
| A61P | Specific therapeutic activity of chemical compounds or medicinal preparations | A61P1/08 | 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 |
|---|---|---|---|---|---|
| 2011-05-10 | Assignment Assignment of assignor's interest | COBALT PHARMACEUTICALS COMPANY signed 2011-05-04 | WATSON LABORATORIES, INC. CORONA, CA | 26252/346 | ECORSEXC, file of 2026-09-25 |
| 2011-03-23 | Assignment Assignment of assignor's interest | DALTON CHEMICAL LABORATORIES INC. signed 2011-03-09 | COBALT PHARMACEUTICALS COMPANY MISSISSAUGA, ONTARIO | 26005/792 | ECORSEXC, file of 2026-09-25 |
| 2009-11-18 | Assignment Assignment of assignor's interest | AVRUTOV, LLYA signed 2009-11-03 BROWN, MARTYN A. signed 2009-11-03 LI, ZEMIN signed 2009-11-03 MIKAYLO, VALERIY signed 2009-11-03 PARAMANANTHAM, SUBAKAR signed 2009-11-03 LAZAROWYCH, NATALIE signed 2009-11-04 | DALTON CHEMICAL LABORATORIES INC. TORONTO | 23535/555 | 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.