
[Federal Register Volume 78, Number 40 (Thursday, February 28, 2013)]
[Notices]
[Pages 13684-13685]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-04645]


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DEPARTMENT OF HEALTH AND HUMAN SERVICES

Food and Drug Administration

[Docket No. FDA-2012-E-0156]


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

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 ZYTIGA 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 along with three copies and written comments 
to the Division of Dockets Management (HFA-305), Food and Drug 
Administration, 5630 Fishers Lane, rm. 1061, Rockville, MD 20852.

FOR FURTHER INFORMATION CONTACT: Beverly Friedman, Office of Regulatory 
Policy, Food and Drug Administration, 10903 New Hampshire Ave., Bldg. 
51, rm. 6284, Silver Spring, MD 20993-0002, 301-796-3602.

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

[[Page 13685]]

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 recently approved for marketing the human drug product ZYTIGA 
(abiraterone acetate). ZYTIGA is indicated for use in combination with 
prednisone for the treatment of patients with metastatic castration-
resistant prostate cancer who have received prior chemotherapy 
containing docetaxel. Subsequent to this approval, the Patent and 
Trademark Office received a patent term restoration application for 
ZYTIGA (U.S. Patent No. 5,604,213) from BTG International LTD, 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 9, 2012, FDA advised the Patent and Trademark Office that 
this human drug product had undergone a regulatory review period and 
that the approval of ZYTIGA 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 
ZYTIGA is 1,927 days. Of this time, 1,797 days occurred during the 
testing phase of the regulatory review period, while 130 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 19, 2006. The applicant claims January 28, 2006, as 
the date the investigational new drug application (IND) became 
effective. However, FDA records indicate that the IND effective date 
was January 19, 2006, which was 30 days after FDA receipt of the IND.
    2. The date the application was initially submitted with respect to 
the human drug product under section 505(b) of the FD&C Act: December 
20, 2010. FDA has verified the applicant's claim that the new drug 
application (NDA) for ZYTIGA (NDA 202-379) was submitted on December 
20, 2010.
    3. The date the application was approved: April 28, 2011. FDA has 
verified the applicant's claim that NDA 202-379 was approved on April 
28, 2011.
    This determination of the regulatory review period establishes the 
maximum potential length of a patent extension. However, the U.S. 
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 1,024 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 April 29, 2013. 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 August 27, 2013. 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 petitions. 
It is only necessary to send one set of comments. However, if you 
submit a written petition, you must submit three copies of the 
petition. Identify comments with the docket number found in brackets in 
the heading of this document. Comments and petitions that have not been 
made publicly available on regulations.gov may be viewed in the 
Division of Dockets Management between 9 a.m. and 4 p.m., Monday 
through Friday.

    Dated: February 15, 2013.
Leslie Kux,
Assistant Commissioner for Policy.
[FR Doc. 2013-04645 Filed 2-27-13; 8:45 am]
BILLING CODE 4160-01-P


