Document ID: FDA-2007-E-0230-0005
Agency: fda
Document Type: Notice
Title: Determination of Regulatory Review Period for Purposes of Patent Extension: Cerenia Tablets
Posted Date: 2009-03-11T04:00Z

[Federal Register: March 11, 2009 (Volume 74, Number 46)]
[Notices]               
[Page 10597-10598]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr11mr09-91]                         

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DEPARTMENT OF HEALTH AND HUMAN SERVICES

Food and Drug Administration

[Docket No. FDA-2007-E-0230]

 
Determination of Regulatory Review Period for Purposes of Patent 
Extension; CERENIA TABLETS

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 CERENIA TABLETS 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 animal 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

[[Page 10598]]

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 animal drug products, the 
testing phase begins on the earlier date when either a major 
environmental effects test was initiated for the drug or when an 
exemption under section 512(j) of the Federal Food, Drug, and Cosmetic 
Act (21 U.S.C. 360b(j)) became effective and runs until the approval 
phase begins. The approval phase starts with the initial submission of 
an application to market the animal 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 an animal 
drug product will include all of the testing phase and approval phase 
as specified in 35 U.S.C. 156(g)(4)(B).
    FDA recently approved for marketing the animal drug product CERENIA 
TABLETS (maropitant citrate monohydrate). CERENIA TABLETS is indicated 
for the prevention of acute vomiting in dogs and the prevention of 
vomiting due to motion sickness in dogs. Subsequent to this approval, 
the Patent and Trademark Office received a patent term restoration 
application for CERENIA TABLETS (U.S. Patent No. 6,255,320) from Pfizer 
Inc., and the Patent and Trademark Office requested FDA's assistance in 
determining this patent's eligibility for patent term restoration. In a 
letter dated May 6, 2008, FDA advised the Patent and Trademark Office 
that this animal drug product had undergone a regulatory review period 
and that the approval of CERENIA TABLETS represented the first 
permitted commercial marketing or use of the product. Shortly 
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 
CERENIA TABLETS is 1,887 days. Of this time, 1,841 days occurred during 
the testing phase of the regulatory review period, while 46 days 
occurred during the approval phase. These periods of time were derived 
from the following dates:
    1. The date an exemption under section 512(j) of the Federal Food, 
Drug, and Cosmetic Act (21 U.S.C. 360b(j)) became effective: December 
1, 2001. The applicant claims November 21, 2000, as the date the 
investigational new animal drug application (INAD) became effective. 
However, the date that a major health or environmental effects test is 
begun or the date on which the agency acknowledges the filing of a 
notice of claimed investigational exemption for a new animal drug, 
whichever is earlier, is the effective date for the INAD. According to 
FDA records, December 1, 2001, is the effective date for the INAD.
    2. The date the application was initially submitted with respect to 
the animal drug product under section 512 of the Federal Food, Drug, 
and Cosmetic Act: December 15, 2006. The applicant claims December 13, 
2006, as the date the new animal drug application (NADA) for CERENIA 
TABLETS (NADA 141-262) was initially submitted. However, a review of 
FDA records reveals that NADA 141-262 was initially submitted on 
December 15, 2006.
    3. The date the application was approved: January 29, 2007. FDA has 
verified the applicant's claim that NADA 141-262 was approved on 
January 29, 2007.
    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 267 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 May 11, 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 September 8, 
2009. 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: February 17, 2009.
Jane A. Axelrad,
Associate Director for Policy, Center for Drug Evaluation and Research.
[FR Doc. E9-5109 Filed 3-10-09; 8:45 am]

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