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


Given below is the list of recent legal activities going on the following drug patents of Purdue Pharma.

Activity Date Patent Number
Patent litigations
Payment of Maintenance Fee, 12th Year, Large Entity 11 Jan, 2023 US7988998
Expire Patent 25 Apr, 2022 US7682628
Expire Patent 14 Mar, 2022 US7658945
Maintenance Fee Reminder Mailed 08 Nov, 2021 US7682628
Maintenance Fee Reminder Mailed 27 Sep, 2021 US7658945
Expire Patent 05 Oct, 2020 US8252809
Expire Patent 21 Sep, 2020 US8242131 (Litigated)
Maintenance Fee Reminder Mailed 20 Apr, 2020 US8252809
Maintenance Fee Reminder Mailed 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 06 Oct, 2016 US8242131 (Litigated)
Mail-Petition Decision - Granted 28 Sep, 2016 US8242131 (Litigated)
Petition Decision - Granted 27 Sep, 2016 US8242131 (Litigated)


Purdue Pharma's Family Patents

Purdue Pharma drugs have patent protection in a total of 26 countries. It's US patent count contributes only to 31.7% of its total global patent coverage. 4 countries have all of their patents expired or invalidated which has opened up potential generic launch opportunities in these countries. Click below to unlock the full patent family tree.

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
(4 months from now)
Active
US8252809 Compositions for treating insomnia 16 Feb, 2025
(4 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
(11 months 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


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