[Federal Register Volume 63, Number 152 (Friday, August 7, 1998)]
[Notices]
[Pages 42407-42408]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-21090]


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DEPARTMENT OF HEALTH AND HUMAN SERVICES

Food and Drug Administration
[Docket No. 97E-0464]


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

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 Mirapex 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 
Commissioner of Patents and Trademarks, Department of Commerce, for the 
extension of a patent which claims that human drug product.

ADDRESSES: Written comments and petitions should be directed to the 
Dockets Management Branch (HFA-305), Food and Drug Administration, 5630 
Fishers Lane, rm. 1061, Rockville, MD 20852.

FOR FURTHER INFORMATION CONTACT: Brian J. Malkin, Office of Health 
Affairs (HFY-20), Food and Drug Administration, 5600 Fishers Lane, 
Rockville, MD 20857, 301-827-6620.
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 Commissioner 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 
Mirapex (pramipexole dihydrochloride monohydrate). 
Mirapex is indicated for the treatment of the signs and 
symptoms of idiopathic Parkinson's disease. Subsequent to this 
approval, the Patent and Trademark Office received a patent term 
restoration application for Mirapex (U.S. Patent No. 
4,886,812) from Boehringer Ingelheim International GmbH, 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 17, 1998, FDA advised the Patent and Trademark Office that 
this human drug product had undergone a regulatory review period and 
that the approval of Mirapex represented the first permitted 
commercial marketing or use of the product. Shortly thereafter, the 
Patent and Trademark Office requested that the FDA determine the 
product's regulatory review period.
    FDA has determined that the applicable regulatory review period for 
Mirapex is 2,576 days. Of this time, 2,024 days occurred 
during the testing phase of the regulatory review period, 552 days 
occurred during the approval phase. These periods of time were derived 
from the following dates:
    1. The date an exemption under section 505 of the Federal Food, 
Drug, and Cosmetic Act (the act) (21 U.S.C. 355) became effective: June 
14, 1990. The applicant claims February 20, 1991, as the date the 
investigational new drug application (IND) became effective. However, 
FDA records indicate that the IND effective date was June 14, 1990, 
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 of the act: December 28, 1995. 
The applicant claims December 26, 1995, as the date the new drug 
application (NDA) for Mirapex (NDA 20-667) was initially 
submitted. However, FDA records indicate that NDA 20-667 was submitted 
on December 28, 1995.
    3. The date the application was approved: July 1, 1997. The 
applicant claims July 2, 1997, as the date the NDA for 
Mirapex (NDA 20-667) was approved. However, FDA records 
indicate that NDA 20-667 was approved on July 1, 1997.
    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 1,440 days of 
patent term extension.
    Anyone with knowledge that any of the dates as published is 
incorrect may, on or before October 6, 1998, submit to the Dockets 
Management Branch (address above) written comments and ask for a 
redetermination. Furthermore, any interested person may petition FDA, 
on or before February 3, 1999, for a determination regarding whether 
the applicant for extension acted with due diligence during the 
regulatory review period. 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.

[[Page 42408]]

    Comments and petitions should be submitted to the Dockets 
Management Branch (address above) in three copies (except that 
individuals may submit single copies) and identified with the docket 
number found in brackets in the heading of this document. Comments and 
petitions may be seen in the Dockets Management Branch between 9 a.m. 
and 4 p.m., Monday through Friday.

    Dated: July 8, 1998.
Thomas J. McGinnis,
Deputy Associate Commissioner for Health Affairs.
[FR Doc. 98-21090 Filed 8-6-98; 8:45 am]
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