Patent Local Rules

Patent Local Rules (PLR), also called local patent rules or patent scheduling rules, are supplementary procedural rules adopted by individual federal district courts to manage the unique case management challenges of patent litigation. ORIGINS: the Northern District of California (NDCA) pioneered PLR in 2001; other high-volume patent districts soon adopted similar frameworks; today, most active patent districts have some form of PLR or standing orders for patent cases; KEY DISTRICTS WITH PLR: Northern District of California (the model); Eastern District of Texas (EDTX — historically the most active patent district); Western District of Texas (WDTX — Judge Alan Albright's standing orders); District of Delaware (D.Del — default scheduling order with patent case provisions); District of New Jersey; Southern District of New York; WHY PLR EXIST: standard civil procedure rules (FRCP) were not designed for patent cases; patent cases require: (1) structured exchange of technical positions before claim construction; (2) early disclosure of infringement theories and invalidity positions; (3) orderly claim construction briefing (Markman) before or during discovery; PLR impose specific content requirements and deadlines for these patent-specific disclosures; VARIATION: PLR vary significantly by district; the NDCA and EDTX PLRs are among the most detailed and most commonly litigated; practitioners must be familiar with the specific PLR of the district where the case is filed.

Under most PLR (using NDCA as the model), the plaintiff must serve INFRINGEMENT CONTENTIONS within approximately 14–28 days after the initial case management conference or defendant's answer: REQUIRED CONTENT: (1) IDENTIFICATION OF ACCUSED PRODUCTS: each product, device, method, process, or service the plaintiff alleges infringes — identified with specificity; vague references to 'product lines' or 'all products' are insufficient; (2) CLAIM CHART (ELEMENT-BY-ELEMENT): for each asserted claim, a detailed element-by-element chart mapping each claim limitation to the specific feature of each accused product; infringement contentions are not sufficient if they merely restate the claim language — the plaintiff must map each element to the accused product with at minimum enough specificity to notify the defendant of the infringement theory; (3) DOCTRINE OF EQUIVALENTS: if DOE infringement is alleged, the contentions must specifically identify the function-way-result or insubstantial differences basis for the DOE theory; (4) DEPENDENT CLAIMS: dependent claims that are asserted must be separately analyzed; the additional limitation must be mapped; (5) PRIORITY DATE: for each asserted patent, identify the priority date (to establish the prior art cutoff for invalidity); AMENDMENT STANDARD: 'good cause' is required to amend infringement contentions after the deadline; courts apply a strict standard; good cause typically requires: (a) newly-discovered information not available before the deadline; (b) diligent pursuit once the new information was discovered; (c) no undue prejudice to the defendant; patent owners who fail to include all accused products in initial contentions often face exclusion of the omitted products.

INVALIDITY CONTENTIONS are served by the defendant, typically 14–45 days after infringement contentions: REQUIRED CONTENT: (1) EACH PRIOR ART REFERENCE: identify each prior art patent, publication, sale, or use the defendant intends to rely on for invalidity (§ 102 anticipation, § 103 obviousness); for patents: patent number, inventor, filing date; for publications: author, title, date, and publisher; for prior public uses or sales: description, evidence, and the persons with knowledge; (2) CLAIM CHARTS: for each asserted claim, a chart mapping each claim limitation to the prior art reference — showing where each element is found in the reference; (3) OBVIOUSNESS COMBINATIONS: for § 103 rejections, identify: (a) each combination of references; (b) motivation to combine (KSR rationale); (4) § 112 GROUNDS: indefiniteness, written description, and enablement grounds for each asserted claim; (5) § 101 GROUNDS: Alice/Mayo invalidity allegations; (6) BEST MODE VIOLATIONS: if applicable; AMENDMENT: 'good cause' to amend, applied strictly; defendants who fail to include prior art in initial contentions risk preclusion of that prior art at trial; DOCUMENT PRODUCTION: many PLR require simultaneous production of all documents evidencing prior art references; DIFFERENCES FROM INITIAL INVALIDITY: the invalidity contentions are more comprehensive than the invalidity defenses in the answer — the answer asserts invalidity generally; the invalidity contentions must identify each specific prior art reference and theory with particularity.

The claim construction (Markman) process is the most critical phase of patent PLR practice: CLAIM CONSTRUCTION DISCLOSURE SCHEDULE (NDCA MODEL): (1) EXCHANGE OF CLAIM TERMS: each party identifies claim terms it believes require construction; parties then confer (meet and confer) to narrow disputed terms; (2) JOINT CLAIM CONSTRUCTION STATEMENT: parties file a joint statement identifying: (a) all disputed claim terms; (b) each party's proposed construction for each term; (c) intrinsic and extrinsic evidence each party relies on; (3) OPENING MARKMAN BRIEFS: typically 25–35 pages; each party argues its preferred constructions; supported by: excerpts from the intrinsic record (specification, prosecution history); expert declarations on technical meaning; (4) RESPONSIVE MARKMAN BRIEFS: reply briefs; (5) TUTORIAL BRIEFS: courts may request tutorial briefs explaining the technology to help the judge understand the technical context; (6) MARKMAN HEARING: oral argument; sometimes includes live technical tutorial; some courts skip the hearing and decide on the briefs; (7) MARKMAN ORDER: the court issues claim construction rulings for each disputed term; IMPACT: the Markman order often determines the case outcome; a construction that narrows a claim may create non-infringement; a construction that broadens a claim may invalidate over prior art; Markman orders are frequently the basis for settlement discussions because both sides can now evaluate their positions with greater certainty.

PLR have profound strategic implications that experienced patent litigators plan for from day one: INITIAL INVESTIGATION BEFORE FILING: the plaintiff must conduct a thorough pre-filing investigation because the infringement contentions (served within weeks of filing) must be specific; vague or incomplete contentions will be subject to a motion to strike; the standard for amendment is strict; CLAIM SELECTION: plaintiffs must choose which claims to assert in the contentions; they typically elect to assert fewer claims than all those initially listed in the complaint; most PLR and courts require plaintiff to elect a small number of claims for trial (often 5–10 per patent); DEFENDANT'S INVALIDITY INVESTIGATION: defendants have only 14–45 days after receiving infringement contentions to serve invalidity contentions; this requires immediate prior art investigation when the case is filed; defendants often use IPR petition preparation as a template for invalidity contentions; TIMING INTERACTION WITH IPR: defendants who plan to file an IPR petition must do so within 1 year of being served with the complaint; the invalidity contentions serve as a roadmap for the IPR petition; the IPR Sotera stipulation (not asserting IPR grounds in district court) affects invalidity contention strategy; DOE ELECTIONS: some courts require plaintiff to elect at the contentions stage whether to rely on literal infringement only, DOE only, or both; locking in DOE theories early requires thorough analysis at the contentions stage; VENUE CHOICE: patent owners choose venue partly based on PLR — EDTX and WDTX historically moved to trial quickly; NDCA provides more case management structure; D.Del is predictable and experienced in patent cases.