Zonisamide Patent Expiration
Zonisamide is Used for controlling seizures. It was first introduced by Advanz Pharma (Us) Corp
Zonisamide Patents
Given below is the list of patents protecting Zonisamide, along with the drug name that holds that patent and the company name owning that drug.
| Drug Used in | Drug Patent Number | Drug Patent Title | Drug Patent Expiry | Drug Owner |
|---|---|---|---|---|
| Zonisade | US11478456 | Oral pharmaceutical composition comprising Zonisamide and process of preparation thereof | Aug 18, 2038 | Azurity |
| Zonisade | US11529333 | Oral pharmaceutical composition comprising zonisamide and process of preparation thereof | Aug 18, 2038 | Azurity |
| Zonisade | US12491179 | Oral Pharmaceutical Composition Comprising Zonisamide And Process Of Preparation Thereof | Aug 18, 2038 | Azurity |
| Zonisade | US12685723 | Aug 18, 2038 | Azurity |
A patent's expiry date may change depending upon legal activities going on that patent. Critical
activities like
abandoning of a patent, term extension of a patent or amendment of its claims can increase or
decrease the life of a
patent hence affecting its expiry date and in turn affecting the generic launch date of that
drug. Tracking these
ongoing activities on a patent application helps to keep an eye on the latest developments in
the patent process of
the drug which can give an idea of how early a drug's generic could be available. The next
section provides a list
of recent legal activities on Zonisamide's patents.
Latest Legal Activities on Zonisamide's Patents
Given below is the list recent legal activities going on the following patents of Zonisamide.
| Activity | Date | Patent Number |
|---|---|---|
 | ||
| Recordation of Patent Grant Mailed Critical
| 20 Dec, 2022 | US11529333 |
| Patent Issue Date Used in PTA Calculation Critical
| 20 Dec, 2022 | US11529333 |
| Email Notification Critical
| 01 Dec, 2022 | US11529333 |
| Issue Notification Mailed Critical
| 30 Nov, 2022 | US11529333 |
| Application Is Considered Ready for Issue Critical
| 23 Nov, 2022 | US11529333 |
| Dispatch to FDC | 23 Nov, 2022 | US11529333 |
| Issue Fee Payment Verified Critical
| 02 Nov, 2022 | US11529333 |
| Issue Fee Payment Received Critical
| 02 Nov, 2022 | US11529333 |
| Recordation of Patent Grant Mailed Critical
| 25 Oct, 2022 | US11478456 |
| Patent Issue Date Used in PTA Calculation Critical
| 25 Oct, 2022 | US11478456 |
Zonisamide's Family Patents
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Clinical Trials
Recent Clinical Trials on Zonisamide:
Sometimes companies keep conducting clinical trials even after the drug's approval to discover new formulations, methods of use, or new treatment indications, so they could file for additional patents or receive regulatory exclusivity extensions, such as pediatric exclusivity, potentially delaying generic competition. Based on these recent clinical trials, generic companies need to consider the potential for new intellectual property or regulatory hurdles. These strategic moves by the drug owner might delay generic substitution or lead to additional sales of the brand drug, even after patent expiry.
| Title | Lead Sponsor | Collaborators | Status | Phases |
|---|---|---|---|---|
 | ||||
| The Zonisamide and Reinforcement for Reducing Alcohol Use (ZARRA) Study | Washington State University | NA |
ACTIVE NOT RECRUITING
(Jul 1, 2026)
| PHASE2 |