
[Federal Register Volume 79, Number 133 (Friday, July 11, 2014)]
[Notices]
[Pages 40108-40109]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-16237]


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DEPARTMENT OF HEALTH AND HUMAN SERVICES

Food and Drug Administration

[Docket No. FDA-2012-E-0434]


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

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 HORIZANT and is publishing this notice of 
that determination as required by law. FDA has made the determination 
because of the

[[Page 40109]]

submission of an application to the Director of the U.S. Patent and 
Trademark Office (USPTO), 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, Center for Drug Evaluation and Research, 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 USPTO 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 HORIZANT 
(gabapentin enacarbil). HORIZANT is indicated for the treatment of 
moderate to severe primary Restless Legs Syndrome in adults. Subsequent 
to this approval, the USPTO received a patent term restoration 
application for HORIZANT (U.S. Patent No. 6,818,787) from XenoPort, 
Inc., and the USPTO requested FDA's assistance in determining this 
patent's eligibility for patent term restoration. In a letter dated 
July 2, 2012, FDA advised the USPTO that this human drug product had 
undergone a regulatory review period and that the approval of HORIZANT 
represented the first permitted commercial marketing or use of the 
product. Thereafter, the USPTO requested that FDA determine the 
product's regulatory review period.
    FDA has determined that the applicable regulatory review period for 
HORIZANT is 2,277 days. Of this time, 1,459 days occurred during the 
testing phase of the regulatory review period, while 818 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: January 12, 2005. FDA has verified the applicant's claim 
that the date the investigational new drug application became effective 
was on January 12, 2005.
    2. The date the application was initially submitted with respect to 
the human drug product under section 505(b) of the FD&C Act: January 9, 
2009. FDA has verified the applicant's claim that the new drug 
application (NDA) for Horizant (NDA 22-399) was submitted on January 9, 
2009.
    3. The date the application was approved: April 6, 2011. FDA has 
verified the applicant's claim that NDA 22-399 was approved on April 6, 
2011.
    This determination of the regulatory review period establishes the 
maximum potential length of a patent extension. However, the USPTO 
applies several statutory limitations in its calculations of the actual 
period for patent extension. In its application for patent extension, 
this applicant seeks 882 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 September 9, 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 January 7, 2015. 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: July 8, 2014.
Leslie Kux,
Assistant Commissioner for Policy.
[FR Doc. 2014-16237 Filed 7-10-14; 8:45 am]
BILLING CODE 4164-01-P


