[Federal Register Volume 76, Number 46 (Wednesday, March 9, 2011)]
[Pages 12974-12975]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-5312]



Food and Drug Administration

[Docket Nos. FDA-2010-E-0483 and FDA-2010-E-0484]

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

AGENCY: Food and Drug Administration, HHS.

ACTION: Notice.


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

ADDRESSES: Submit electronic comments to 
http:[sol][sol]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. 6222, 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 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 AMPYRA 
(dalfampridine). AMPYRA is indicated to improve walking in patients 
with multiple sclerosis. Subsequent to this approval, the Patent and 
Trademark Office received patent term restoration applications for 
AMPYRA (U.S. Patent Nos. 5,370,879 and 5,540,938) from Elan Pharma 
International Ltd., and the Patent and Trademark Office requested FDA's 
assistance in determining the patents' eligibility for patent term 
restoration. In a letter dated September 30, 2010, FDA advised the 
Patent and Trademark Office that this human drug product had undergone 
a regulatory review period and that the approval of AMPYRA 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 
AMPYRA is 9,845 days. Of this time, 9,569 days occurred during the 
testing phase of the regulatory review period, while 276 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: February 10, 1983. The applicant claims January 1, 1980, as 
the date the investigational new drug application (IND) became 
effective. However, FDA records indicate that the IND was initially 
placed on clinical hold. The applicant was informed that the 
investigational studies were allowed to proceed on February 10, 1983, 
the effective date 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: April 22, 
2009. FDA has verified the applicant's claim that the new drug 
application (NDA) for AMPYRA (NDA 22-250) was submitted on April 22, 
    3. The date the application was approved: January 22, 2010. FDA has 
verified the applicant's claim that NDA 22-250 was approved on January 
22, 2010.
    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 
applications for patent extension, this applicant seeks 1,827 and 1,826 
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 May 9, 2011. 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 September 5, 2011. To meet its burden, the petition must contain 
sufficient facts

[[Page 12975]]

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. It is no longer 
necessary to send three copies of mailed 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 http:[sol][sol]www.regulations.gov may be viewed in the Division of 
Dockets Management between 9 a.m. and 4 p.m., Monday through Friday.

    Dated: February 14, 2011.
Jane A. Axelrad,
Associate Director for Policy, Center for Drug Evaluation and Research.
[FR Doc. 2011-5312 Filed 3-8-11; 8:45 am]