Acetaminophen Patent Expiration

Acetaminophen was first introduced by Johnson And Johnson Consumer Inc Mcneil Consumer Healthcare Div in its drug Tylenol on Approved Prior to Jan 1, 1982. Other drugs containing Acetaminophen are Ofirmev, Acephen, Infants' Feverall, Injectapap, Neopap, Acetaminophen. 30 different companies have introduced drugs containing Acetaminophen.


Acetaminophen Patents

Given below is the list of patents protecting Acetaminophen, 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
Ofirmev US9399012

(Pediatric)

Reduced dose intravenous acetaminophen Mar 11, 2032 Mallinckrodt Hosp
Ofirmev US9399012 Reduced dose intravenous acetaminophen Sep 11, 2031 Mallinckrodt Hosp
Acetaminophen US8741959 Paracetamol for parenteral administration Apr 19, 2030 Fresenius Kabi Usa
Ofirmev US9610265

(Pediatric)

Reduced dose intravenous acetaminophen May 13, 2029 Mallinckrodt Hosp
Ofirmev US9987238

(Pediatric)

Reduced dose intravenous acetaminophen May 13, 2029 Mallinckrodt Hosp
Ofirmev US10383834 Reduced dose intravenous acetaminophen Nov 13, 2028 Mallinckrodt Hosp
Ofirmev US9610265 Reduced dose intravenous acetaminophen Nov 13, 2028 Mallinckrodt Hosp
Ofirmev US9987238 Reduced dose intravenous acetaminophen Nov 13, 2028 Mallinckrodt Hosp
Ofirmev US6992218

(Pediatric)

Method for obtaining aqueous formulations of oxidation-sensitive active principles Dec 06, 2021

(Expired)

Mallinckrodt Hosp
Ofirmev US6992218 Method for obtaining aqueous formulations of oxidation-sensitive active principles Jun 06, 2021

(Expired)

Mallinckrodt Hosp
Ofirmev US6028222

(Pediatric)

Stable liquid paracetamol compositions, and method for preparing same Feb 05, 2018

(Expired)

Mallinckrodt Hosp
Ofirmev US6028222 Stable liquid paracetamol compositions, and method for preparing same Aug 05, 2017

(Expired)

Mallinckrodt Hosp



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 Acetaminophen's patents.

Given below is the list recent legal activities going on the following patents of Acetaminophen.

Activity Date Patent Number
Patent litigations
Payment of Maintenance Fee, 8th Year, Large Entity 03 Dec, 2021 US8741959
Payment of Maintenance Fee, 4th Year, Large Entity 23 Nov, 2017 US8741959
Patent Issue Date Used in PTA Calculation 03 Jun, 2014 US8741959
Recordation of Patent Grant Mailed 03 Jun, 2014 US8741959
Email Notification 16 May, 2014 US8741959
Issue Notification Mailed 14 May, 2014 US8741959
Dispatch to FDC 05 May, 2014 US8741959
Application Is Considered Ready for Issue 05 May, 2014 US8741959
Issue Fee Payment Verified 24 Apr, 2014 US8741959
Issue Fee Payment Received 24 Apr, 2014 US8741959


Acetaminophen's Family Patents

Family Patents

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Acetaminophen Generic API Manufacturers

Several generic applications have been filed for Acetaminophen. The first generic version for Acetaminophen was by Perrigo New York Inc and was approved on Dec 1, 1986. And the latest generic version is by Baxter Healthcare Corp and was approved on May 21, 2025.

Given below is the list of companies who have filed for Acetaminophen generic, along with the locations of their manufacturing plants worldwide.