Purdue Pharma Drug Patent Portfolio
Purdue Pharma owns 2 orange book drugs protected by 8 US patents Given below is the list of Purdue Pharma's drug patents along with their expiration dates.
| Drug Patent Number | Drug Patent Title | Drug Patent Expiry | Status |
|---|---|---|---|
| US8242131 | Methods of treating middle-of-the-night insomnia | 20 Aug, 2029 | Active |
| US7658945 | Compositions for delivering hypnotic agents across the oral mucosa and methods of use thereof | 15 Apr, 2027 | Active |
| US7682628 | Compositions for delivering hypnotic agents across the oral mucosa and methods of use thereof | 16 Feb, 2025 | Active |
| US8252809 | Compositions for treating insomnia | 16 Feb, 2025 | Active |
| US7988998 | Sustained-release tramadol formulations with 24-hour efficacy | 27 Oct, 2023 | Expired |
| US6607748 | Cross-linked high amylose starch for use in controlled-release pharmaceutical formulations and processes for its manufacture | 29 Jun, 2020 | Expired |
| US5591452 | Controlled release formulation | 10 May, 2014 | Expired |
| US6254887 | Controlled release tramadol | 10 May, 2014 | Expired |
Latest Legal Activities on Purdue Pharma's Drug Patents
Given below is the list of recent legal activities going on the following drug patents of Purdue Pharma.
| Activity | Date | Patent Number |
|---|---|---|
 | ||
| Payment of Maintenance Fee, 12th Year, Large Entity | 11 Jan, 2023 | US7988998 |
|
Expire Patent
Critical
| 25 Apr, 2022 | US7682628 |
|
Expire Patent
Critical
| 14 Mar, 2022 | US7658945 |
|
Maintenance Fee Reminder Mailed
Critical
| 08 Nov, 2021 | US7682628 |
|
Maintenance Fee Reminder Mailed
Critical
| 27 Sep, 2021 | US7658945 |
|
Expire Patent
Critical
| 05 Oct, 2020 | US8252809 |
|
Expire Patent
Critical
| 21 Sep, 2020 | US8242131 (Litigated) |
|
Maintenance Fee Reminder Mailed
Critical
| 20 Apr, 2020 | US8252809 |
|
Maintenance Fee Reminder Mailed
Critical
| 06 Apr, 2020 | US8242131 (Litigated) |
| Payment of Maintenance Fee, 8th Year, Large Entity | 16 Jan, 2019 | US7988998 |
| Payment of Maintenance Fee, 8th Year, Large Entity | 29 Aug, 2017 | US7682628 |
| Post Issue Communication - Certificate of Correction | 23 Jan, 2017 | US8242131 (Litigated) |
|
Email Notification
Critical
| 06 Oct, 2016 | US8242131 (Litigated) |
| Mail-Petition Decision - Granted | 28 Sep, 2016 | US8242131 (Litigated) |
|
Petition Decision - Granted
Critical
| 27 Sep, 2016 | US8242131 (Litigated) |
Purdue Pharma's Family Patents
Purdue Pharma Drug List
Given below is the complete list of Purdue Pharma's drugs and the patents protecting them.
1. Intermezzo
Intermezzo is protected by 4 patents, out of which none have expired yet. Check out its patent list below.
| Drug Patent Number | Drug Patent Title | Drug Patent Expiry | Status |
|---|---|---|---|
| US8242131 | Methods of treating middle-of-the-night insomnia |
20 Aug, 2029
(4 years from now)
| Active |
| US7658945 | Compositions for delivering hypnotic agents across the oral mucosa and methods of use thereof |
15 Apr, 2027
(2 years from now)
| Active |
| US7682628 | Compositions for delivering hypnotic agents across the oral mucosa and methods of use thereof |
16 Feb, 2025
(3 months from now)
| Active |
| US8252809 | Compositions for treating insomnia |
16 Feb, 2025
(3 months from now)
| Active |
Discover which of these patents contain the active ingredient(API) of the drug, their family patents, along with litigation and legal activity details of these patents on Intermezzo's drug page
2. Ryzolt
Ryzolt is protected by 4 patents, out of which all have expired. Check out its patent list below.
| Drug Patent Number | Drug Patent Title | Drug Patent Expiry | Status |
|---|---|---|---|
| US7988998 | Sustained-release tramadol formulations with 24-hour efficacy |
27 Oct, 2023
(1 year, 20 days ago)
| Expired |
| US6607748 | Cross-linked high amylose starch for use in controlled-release pharmaceutical formulations and processes for its manufacture |
29 Jun, 2020
(4 years ago)
| Expired |
| US5591452 | Controlled release formulation |
10 May, 2014
(10 years ago)
| Expired |
| US6254887 | Controlled release tramadol |
10 May, 2014
(10 years ago)
| Expired |
Discover which of these patents contain the active ingredient(API) of the drug, their family patents, along with litigation and legal activity details of these patents on Ryzolt's drug page