Document ID: FDA-2009-E-0021-0006
Agency: fda
Document Type: Notice
Title: Determination of Regulatory Review Period for Purposes of Patent Extension; DUREZOL
Posted Date: 2009-07-29T04:00Z

[Federal Register: July 29, 2009 (Volume 74, Number 144)]
[Notices]               
[Page 37716-37717]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr29jy09-80]                         

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DEPARTMENT OF HEALTH AND HUMAN SERVICES

Food and Drug Administration

[Docket No. FDA-2009-E-0021]

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

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 DUREZOL 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 written comments and petitions to the Division of 
Dockets Management (HFA-305), Food and Drug Administration, 5630 
Fishers Lane, rm. 1061, Rockville, MD 20852. Submit electronic comments 
to http://www.regulations.gov.

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 (Public Law 98-417) and the Generic Animal Drug 
and Patent Term Restoration Act (Public Law 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

[[Page 37717]]

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 DUREZOL 
(difluprednate ophthalmic emulsion). DUREZOL is indicated for the 
treatment of inflammation and pain associated with ocular surgery. 
Subsequent to this approval, the Patent and Trademark Office received a 
patent term restoration application for DUREZOL (U.S. Patent No. 
6,114,319) from Senju Pharmaceutical Co. 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 
February 18, 2009, FDA advised the Patent and Trademark Office that 
this human drug product had undergone a regulatory review period and 
that the approval of DUREZOL 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 
DUREZOL is 560 days. Of this time, 369 days occurred during the testing 
phase of the regulatory review period, while 181 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 act) (21 U.S.C. 355(i)) became effective: 
December 13, 2006. FDA has verified the applicant's claim that the 
investigational new drug application became effective on December 13, 
2006.
    2. The date the application was initially submitted with respect to 
the human drug product under section 505(b) of the act: December 26, 
2007. FDA has verified the applicant's claim that the new drug 
application (NDA) for DUREZOL (NDA 22-212) was initially submitted on 
December 26, 2007.
    3. The date the application was approved: June 23, 2008. FDA has 
verified the applicant's claim that NDA 22-212 was approved on June 23, 
2008.
    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 369 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) written or electronic comments and ask for a redetermination 
by September 28, 2009. 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 
25, 2010. 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.
    Comments and petitions should be submitted to the Division of 
Dockets Management. Three copies of any mailed information are to be 
submitted, except that individuals may submit one copy. Comments are to 
be identified with the docket number found in brackets in the heading 
of this document. Comments and petitions may be seen in the Division of 
Dockets Management between 9 a.m. and 4 p.m., Monday through Friday.

    Dated: June 23, 2009.
Jane A. Axelrad,
Associate Director for Policy, Center for Drug Evaluation and Research.
[FR Doc. E9-18034 Filed 7-28-09; 8:45 am]

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