
[Federal Register Volume 79, Number 100 (Friday, May 23, 2014)]
[Notices]
[Pages 29782-29783]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-11926]


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DEPARTMENT OF HEALTH AND HUMAN SERVICES

Food and Drug Administration

[Docket No. FDA-2013-E-0469]


Determination of Regulatory Review Period for Purposes of Patent 
Extension; LINZESS

AGENCY: Food and Drug Administration, HHS.

ACTION: Notice.

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SUMMARY: The Food and Drug Administration (FDA) has determined the 
regulatory review period for LINZESS and is publishing this notice of 
that determination as required by law. FDA has made the determination 
because of the submission of an application to the Director of Patents 
and Trademarks, Department of Commerce, for the extension of a patent 
which claims that human drug product.

ADDRESSES: Submit electronic comments to http://www.regulations.gov. 
Submit written petitions (two copies are required) and written comments 
to the Division of Dockets Management (HFA-305), Food and Drug 
Administration, 5630 Fishers Lane, Rm. 1061, Rockville, MD 20852. 
Submit petitions electronically to http://www.regulations.gov at Docket 
No. FDA-2013-S-0610.

FOR FURTHER INFORMATION CONTACT: Beverly Friedman, Office of 
Management, Food and Drug Administration, 10903 New Hampshire Ave., 
Bldg. 51, Rm. 6257, Silver Spring, MD 20993-0002, 301-796-7900.

SUPPLEMENTARY INFORMATION: The Drug Price Competition and Patent Term 
Restoration Act of 1984 (Pub. L. 98-417) and the Generic Animal Drug 
and Patent Term Restoration Act (Pub. L. 100-670) generally provide 
that a patent may be extended for a period of up to 5 years so long as 
the patented item (human drug product, animal drug product, medical 
device, food additive, or color additive) was subject to regulatory 
review by FDA before the item was marketed. Under these acts, a 
product's regulatory review period forms the basis for determining the 
amount of extension an applicant may receive.
    A regulatory review period consists of two periods of time: A 
testing phase and an approval phase. For human drug products, the 
testing phase begins when the exemption to permit the clinical 
investigations of the drug becomes effective and runs until the 
approval phase begins. The approval phase starts with the initial 
submission of an application to market the human drug product and 
continues until FDA grants permission to market the drug product. 
Although only a portion of a regulatory review period may count toward 
the actual amount of extension that the Director of Patents and 
Trademarks may award (for example, half the testing phase must be 
subtracted as well as any time that may have occurred before the patent 
was issued), FDA's determination of the length of a regulatory review 
period for a human drug product will include all of the testing phase 
and approval phase as specified in 35 U.S.C. 156(g)(1)(B).
    FDA has approved for marketing the human drug product LINZESS 
(linaclotide). LINZESS is indicated for treatment of irritable bowel 
syndrome with constipation and chronic idiopathic constipation. 
Subsequent to this approval, the Patent and Trademark Office received a 
patent term restoration application for LINZESS (U.S. Patent No. 
7,304,036) from Ironwood Pharmaceuticals, Inc., and the Patent and 
Trademark Office requested FDA's assistance in determining this 
patent's eligibility for patent term restoration. In a letter dated 
July 10, 2013, FDA advised the Patent and Trademark Office that this 
human drug product had undergone a regulatory review period and that 
the approval of LINZESS represented the first permitted commercial 
marketing or use of the product. Thereafter, the Patent and Trademark 
Office requested that FDA determine the product's regulatory review 
period.
    FDA has determined that the applicable regulatory review period for 
LINZESS is 2,863 days. Of this time, 2,475 days occurred during the 
testing phase of the regulatory review period, while 388 days occurred 
during the approval phase. These periods of time were derived from the 
following dates:
    1. The date an exemption under section 505(i) of the Federal Food, 
Drug, and Cosmetic Act (the FD&C Act) (21 U.S.C. 355(i)) became 
effective: October 30, 2004. FDA has verified the applicant's claim 
that the date the investigational new drug application became effective 
was on October 30, 2004.
    2. The date the application was initially submitted with respect to 
the human drug product under section 505(b) of the FD&C Act: August 9, 
2011. FDA has verified the applicant's claim

[[Page 29783]]

that the new drug application (NDA) for LINZESS (NDA 202811) was 
submitted on August 9, 2011.
    3. The date the application was approved: August 30, 2012. FDA has 
verified the applicant's claim that NDA 202811 was approved on August 
30, 2012.
    This determination of the regulatory review period establishes the 
maximum potential length of a patent extension. However, the Patent and 
Trademark Office applies several statutory limitations in its 
calculations of the actual period for patent extension. In its 
application for patent extension, this applicant seeks 945 days of 
patent term extension.
    Anyone with knowledge that any of the dates as published are 
incorrect may submit to the Division of Dockets Management (see 
ADDRESSES) either electronic or written comments and ask for a 
redetermination by July 22, 2014. Furthermore, any interested person 
may petition FDA for a determination regarding whether the applicant 
for extension acted with due diligence during the regulatory review 
period by November 19, 2014. To meet its burden, the petition must 
contain sufficient facts to merit an FDA investigation. (See H. Rept. 
857, part 1, 98th Cong., 2d sess., pp. 41-42, 1984.) Petitions should 
be in the format specified in 21 CFR 10.30.
    Interested persons may submit to the Division of Dockets Management 
(see ADDRESSES) electronic or written comments and written or 
electronic petitions. It is only necessary to send one set of comments. 
Identify comments with the docket number found in brackets in the 
heading of this document. If you submit a written petition, two copies 
are required. A petition submitted electronically must be submitted to 
http://www.regulations.gov, Docket No. FDA-2013-S-0610. Comments and 
petitions that have not been made publicly available on http://www.regulations.gov may be viewed in the Division of Dockets Management 
between 9 a.m. and 4 p.m., Monday through Friday.

    Dated: May 15, 2014.
Leslie Kux,
Assistant Commissioner for Policy.
[FR Doc. 2014-11926 Filed 5-22-14; 8:45 am]
BILLING CODE 4160-01-P


