Source: https://www.uspto.gov/web/offices/pac/mpep/s2751.html
Timestamp: 2019-04-18 21:30:04+00:00

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(B) a new animal drug or veterinary biological product (as those terms are used in the Federal Food, Drug, and Cosmetic Act and the Virus-Serum-Toxin Act) which is not primarily manufactured using recombinant DNA, recombinant RNA, hybridoma technology, or other processes involving site specific genetic manipulation techniques, including any salt or ester of the active ingredient, as a single entity or in combination with another active ingredient.
(3) The term “major health or environmental effects test” means a test which is reasonably related to the evaluation of the health or environmental effects of a product, which requires at least six months to conduct, and the data from which is submitted to receive permission for commercial marketing or use. Periods of analysis or evaluation of test results are not to be included in determining if the conduct of a test required at least six months.
(A) Any reference to section 351 is a reference to section 351 of the Public Health Service Act.
(B) Any reference to section 503, 505, 512, or 515 is a reference to section 503, 505, 512, or 515 of the Federal Food, Drug and Cosmetic Act.
(C) Any reference to the Virus-Serum-Toxin Act is a reference to the Act of March 4, 1913 (21 U.S.C. 151 - 158).
(5) The term “informal hearing” has the meaning prescribed for such term by section 201(y) of the Federal Food, Drug and Cosmetic Act.
(6) The term “patent” means a patent issued by the United States Patent and Trademark Office.
(7) The term “date of enactment” as used in this section means September 24, 1984, for human drug product, a medical device, food additive, or color additive.
(8) The term “date of enactment” as used in this section means the date of enactment of the Generic Animal Drug and Patent Term Restoration Act for an animal drug or a veterinary biological product.
(a) A patent is eligible for extension of the patent term if the patent claims a product as defined in paragraph (b) of this section, either alone or in combination with other ingredients that read on a composition that received permission for commercial marketing or use, or a method of using such a product, or a method of manufacturing such a product, and meets all other conditions and requirements of this subpart.
(3) Any medical device, food additive, or color additive subject to regulation under the Federal Food, Drug, and Cosmetic Act.
(3) In the case of a patent claiming a new animal drug or a veterinary biological product that is not covered by the claims in any other patent that has been extended, and has received permission for the commercial marketing or use in non-food-producing animals and in food-producing animals, and was not extended on the basis of the regulatory review period for use in non-food-producing animals, the permission for the commercial marketing or use of the drug or product after the regulatory review period for use in food-producing animals is the first permitted commercial marketing or use of the drug or product for administration to a food-producing animal.
(h) No other patent term has been extended for the same regulatory review period for the product.
(5) the approval is the first permitted commercial marketing or use of the product (35 U.S.C. 156(a)(5)(A)), except in the case of human drug products manufactured using recombinant DNA technology where the provisions of 35 U.S.C. 156(a)(5)(B) apply, or in the case of a new animal drug or a veterinary biological product where the provisions of 35 U.S.C. 156(a)(5)(C) apply.
35 U.S.C. 156(c)(4) also requires that no other patent term has been extended for the same regulatory review period for the product. See MPEP § 2761.
A patent may be extended under 35 U.S.C. 156, even though it has been terminally disclaimed. A patent term extension under 35 U.S.C. 156 is a limited extension of the patent rights associated with the approved product that is attached onto the original term of the patent. See 35 U.S.C. 156(b). Only one patent may be extended for a regulatory review period for any product, and 35 U.S.C. 156 sets the expiration date of a patent term extension. Although 35 U.S.C. 154(b)(2) (June 8, 1995) precludes a patent from being extended under 35 U.S.C. 154(b) if the patent has been terminally disclaimed due to an obviousness-type double patenting rejection (see MPEP § 2720), there is no such exclusion in 35 U.S.C. 156. Additionally, 35 U.S.C. 154(b)(2)(B)) (May 29, 2000) provides that a patent cannot be adjusted beyond the date set by the disclaimer (see MPEP § 2730), but there is no similar provision in 35 U.S.C. 156. Thus patents may receive a patent term extension under 35 U.S.C. 156 beyond an expiration date set by a terminal disclaimer. See Merck & Co., Inc. v. Hi-Tech Pharmacal, Co., Inc., 482 F3d 1317, 82 USPQ2d 1203 (Fed. Cir. 2007).
(B) meet all other conditions and requirements of the statute.
The term “claims a product” is not synonymous with “infringed by a product.” A patent which claims a metabolite of an approved drug does not claim the approved drug. Hoechst-Roussel Pharmaceuticals Inc. v. Lehman, 109 F.3d 756, 759, 42 USPQ2d 1220, 1223 (Fed. Cir. 1997).
(C) Any medical device, food additive, or color additive subject to regulation under the Federal Food, Drug, and Cosmetic Act.
See 21 CFR 60.3(b) for definitions of terms such as active ingredient, color additive, food additive, human drug product, and medical device.
Essentially, a “product” is a “drug product,” medical device, food additive, or color additive requiring Food and Drug Administration or Department of Agriculture (Plant and Animal Inspection Service) approval of an order or regulation prior to commercial marketing or use. “Drug product” is the active ingredient of a human drug, animal drug (excluding those primarily manufactured using recombinant DNA, recombinant RNA, hybridoma technology, or other processes including site specific genetic manipulation techniques), or biological product (as defined by the Federal Food, Drug and Cosmetics Act and the Public Health Service Act) including any salt or ester of the active ingredient, as a single entity or in combination with another active ingredient. Animal biological products are approved by the Plant and Animal Inspection Service of the Department of Agriculture.
A “drug product” means the active ingredient found in the final dosage form prior to administration of the product to the patient, not the resultant form the drug may take after administration. See Hoechst-Roussel, 109 F.3d at 759 n.3 (“For purposes of patent term extension, this active ingredient must be present in the drug product when administered.”). In addition, a patent to a drug product having one form of an active ingredient may qualify for an extension even though another form of the underlying chemical moiety was previously approved and commercially marketed or used. For example, a drug product having the ester form of a particular chemical moiety is a different drug product from the same chemical moiety in a salt form, even though both the salt and the ester are used to treat the same disease condition. See PhotoCure v. Kappos, 603 F.3d 1372, 95 USPQ2d 1250 (Fed. Cir. 2010); see also Glaxo Operations UK Ltd. v. Quigg, 894 F.2d 392, 13 USPQ2d 1628 (Fed. Cir. 1990) (holding that a patent which claimed an ester of the acid cefuroxime was eligible for extension regardless of previous approvals of two salts of cefuroxime). Thus, eligibility for patent term extension for a patent which claims a product subject to regulatory review as set forth in 35 U.S.C. 156(b) turns on the question of whether the product, i.e., the active ingredient of the drug product, present in the final dosage form was previously approved by FDA. If neither it, nor any salt or ester of that active ingredient has been previously approved by FDA, then the patent should be eligible for patent term extension.
Furthermore, a “drug product” is the active ingredient of a particular new drug, rather than the entire composition of the drug product approved by the Food and Drug Administration. See Fisons plc v. Quigg, 1988 U.S. Dist. LEXIS 10935; 8 USPQ2d 1491, 1495 (D.D.C. 1988); aff’d., 876 F2d 99, 110; 10 USPQ2d 1869, 1870 (Fed. Cir. 1989).
A patent is considered to claim the product at least in those situations where the patent claims the active ingredient per se, or claims a composition or formulation which contains the active ingredient(s) and reads on the composition or formulation approved for commercial marketing or use.
37 CFR 1.720(b) explains that patent term extension pursuant to 35 U.S.C. 156 is available only if the term of the patent has never been previously extended, except for extensions issued pursuant to 37 CFR 1.701, 1.760, or 1.790. An extension issued pursuant to 37 CFR 1.701 is an extension of the patent due to administrative delay within the Office. Note that the term of a patent is “adjusted,” not extended, pursuant to 37 CFR 1.702-1.705. An extension issued pursuant to 37 CFR 1.760 is an interim extension under 35 U.S.C. 156(e)(2). An extension issued pursuant to 37 CFR 1.790 is an interim extension under 35 U.S.C. 156(d)(5).
37 CFR 1.720(d) restates the statutory requirement set forth in 35 U.S.C. 156(a)(4). The regulatory review period must have been a regulatory review period defined by the statute. A regulatory review period under section 510(k) of the Federal Food, Drug and Cosmetic Act is not a regulatory review period which gives rise to eligibility for patent term extension under 35 U.S.C. 156. In re Nitinol Medical Technologies Inc., 17 USPQ2d 1492, 1492-1493 (Comm’r Pat. & Tm. 1990). See also Baxter Diagnostics v. AVL Scientific Corp., 798 F. Supp. 612, 619-620; 25 USPQ2d 1428,1434 (CD Cal. 1992)(Congress intended only Class III medical devices to be eligible for patent term extension).
If the product is alleged to be a medical device, then regulatory review must have occurred under section 515, and not section 505, of the Federal Food, Drug and Cosmetic Act. Drug products are not reviewed under section 515.
If more than one application for patent term extension is filed based upon a single regulatory review period, election will be required of a single patent. See MPEP § 2761.
37 CFR 1.720(e) follows 35 U.S.C. 156(a)(5), and sets forth that the approval under the relevant provision of law must have been the first permitted marketing or use of the product under the provision of law, unless the product is for use in food producing animals as explained below. See In re Patent Term Extension Application, U.S. Patent No. 3,849,549, 226 USPQ 283, 284 (Pat. & Tm. Office 1985). If the product is a human drug product, then the approval of the active ingredient must be the first permitted commercial marketing or use of the active ingredient as a single entity or in combination with another active ingredient under the provision of law under which regulatory review occurred.
Where a product contains multiple active ingredients, if any one active ingredient has not been previously approved, it can form the basis of an extension of patent term provided the patent claims that ingredient. See In re Alcon Laboratories Inc., 13 USPQ2d 1115, 1121 (Comm’r Pat. & Tm. 1989) for examples of products having different combinations of active ingredients. A different ratio of hormones is not a different active ingredient for purposes of 35 U.S.C. 156. Furthermore, an approved product having two active ingredients will not be considered to have a single active ingredient made of the two active ingredients. See Arnold Partnership v. Dudas, 362 F.3d 1338, 70 USPQ2d 1311 (Fed. Cir. 2004). In considering whether a patent claiming an enantiomer, where the enantiomer was subject to pre-market regulatory review, is barred from receiving patent term extension in light of the previous approval of the racemate of the drug product, the court indicated that an enantiomer was a separate drug product from the racemate and each could support a patent term extension. See Ortho-McNeil Pharmaceutical Inc. v. Lupin Pharmaceuticals Inc., 603 F3d 1377, 95 USPQ2d 1246 (Fed. Cir. 2010).
(D) the second or subsequent approval was the first permitted commercial marketing or use of the drug or product for administration to a food-producing animal. In this case, the application must be filed within sixty days of the first approval for administration to a food-producing animal.
For animal drugs or products, prior approval for use in a non-food producing animal will not make a patent ineligible for patent term extension based upon a later approval of the drug or product for use in food producing animals, if the later approval is the first approval of the drug or product for use in food producing animals.

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