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Disclosure Requirements for Patent Cases Arising under 21 U.S.C. § 355

W.D. Tenn. Local Rule 3.10

(commonly referred to as “the Hatch-Waxman Act”) The following provisions apply to all patents subject to a Paragraph IV certification in cases arising under 21 U.S.C. § 355 (commonly referred to as “the Hatch-Waxman Act”). These provisions take precedence over any conflicting provisions in LPR 3.1-3.8 for all cases arising under 21 U.S.C. § 355. (a) Production of New Drug Application. At or before the Patent Scheduling Conference, Defendant(s) shall produce to Plaintiff(s) the entire Abbreviated New Drug Application or New Drug Application that is the basis of the case in question. (b) Invalidity Contentions. Within 14 days after the Patent Scheduling Conference, Defendant(s) shall provide to Plaintiff(s) written Invalidity Contentions for any patents referred to in Defendant(s) Paragraph IV Certification. At a minimum, these Invalidity Contentions should include those items required by LPR 3.5(a)- (d). (c) Production of Materials Supporting Invalidity Contentions. Any Invalidity Contentions disclosed under LPR 3.10(b) shall be accompanied by the production of any document or thing that each Defendant intends to rely on to show invalidity. At a minimum, this disclosure should comply with LPR 3.6(a). (d) Non-infringement Contentions. Within 30 days after the Patent Scheduling Conference, Defendant(s) shall provide to Plaintiff(s) the written basis for their Non-infringement Contentions for any patents referred to in Defendant(s) Paragraph IV Certification, which shall include a claim chart as required by LPR Page 11 of 17 Local Patent Rules - Western District of Tennessee 3.3(a) identifying each claim at issue in the case and each limitation of each claim at issue. The claim chart shall specifically identify for each claim which claim limitation(s) are literally absent from the Defendant(s) allegedly infringing Abbreviated New Drug Application or New Drug Application. (e) Production of Materials Supporting Non-infringement Contentions. Any Non- infringement Contentions disclosed under LPR 3.10(d) shall be accompanied by the production of any document or thing that each Defendant intends to rely on in defense against any infringement contentions by Plaintiff(s), including those items required by LPR 3.4(a). (f) Infringement Contentions. Within 45 days after the disclosure of the Non- infringement Contentions as required by LPR 3.10(d), Plaintiff(s) shall provide Defendant(s) with Infringement Contentions for all patents referred to in Defendant(s) Paragraph IV Certification, including, at a minimum, those items required by LPR 3.1. (g) Production of Materials Supporting Infringement Contentions. Any Infringement Contentions disclosed under LPR 3.10(f) shall be accompanied by the production of documents required under LPR 3.2. 3.11. Amending and Supplementing Contentions Unless otherwise ordered by the Court, the parties’ contentions and responses shall have the same binding effect on a party as a response to an interrogatory made under Rule 33 of the Federal Rules of Civil Procedure. The parties’ disclosures and responses may be amended or supplemented without leave of Court until the Final Contentions are due under LPR 3.8(a)-(c); provided, however, that after submission of the exchange of claim terms under LPR 4.1(c), additional claims in the patent(s) in suit may not be asserted without obtaining leave from the Court for good cause shown. 3.12. Final Date to Seek Stay Pending Reexamination Absent exceptional circumstances, no party may file a motion to stay the lawsuit pending reexamination in the United States Patent Office after the due date for service of that party's Final Contentions. IV. CLAIM CONSTRUCTION PROCEEDINGS
Official source: https://www.tnwd.uscourts.gov/sites/tnwd/files/Local%20Rules%20%E2%80%93%20Revised%2011.17 · retrieved 2026-07-23