casemark/answer-with-invalidity-contentions

Answer with Invalidity Contentions

Combined answer and Patent Local Rule 3-3 invalidity contentions for a patent defendant — responds to each complaint allegation while building the invalidity record for trial.

Prerequisites

1. Complaint — all numbered paragraphs requiring response
2. Asserted patent(s) — specification, claims, and prosecution history
3. Prior art — patents, publications, products, or public uses with qualifying dates
4. Jurisdiction — district court and applicable local patent rules (PLR 3-3 or equivalent)
5. Effective filing date — pre-AIA (before March 16, 2013) vs. AIA § 102 framework
6. Accused product/method — for non-infringement admissions and denials

Output Structure

1. Caption and Introduction

• Full party names, civil action number, division
• Title: DEFENDANT'S ANSWER AND INVALIDITY CONTENTIONS
• Jury demand if not previously filed (FRCP 38)
• Opening denial of infringement of any valid, enforceable claim

2. Admissions and Denials (FRCP 8(b))

Respond paragraph-by-paragraph mirroring complaint numbering.

| Response | When | Language | |---|---|---| | Admit | Verifiable facts (jurisdiction, patent issuance) | "Defendant admits U.S. Patent No. X was issued on [date]." | | Admit in part / Deny in part | Mixed fact and legal conclusion | "Admits it manufactures [product]; denies infringement of any valid claim." | | Lack of knowledge (8(b)(5)) | Within plaintiff's peculiar knowledge | "Lacks sufficient knowledge; treated as denial." | | Deny | False facts and all legal conclusions | "Defendant denies." |

• Address each sub-part of compound paragraphs individually
• Close: "All allegations not expressly admitted are denied." (FRCP 8(b)(6))

3. Affirmative Defenses

Number separately. Apply Twombly/Iqbal plausibility with brief factual predicates.

| # | Defense | Notes | |---|---|---| | 1 | Non-infringement | Literal and DOE | | 2 | Invalidity — §§ 101, 102, 103, 112 | Claim charts in § 5; pled in alternative | | 3 | Inequitable conduct | FRCP 9(b) particularity; reserved pending discovery | | 4 | Prosecution laches / Equitable estoppel | If prosecution history supports | | 5 | License / Exhaustion | If authorized sale or course of dealing | | 6 | Failure to state a claim | Missing claim specificity | | 7 | Statute of limitations | 35 U.S.C. § 286 (6-year bar) | | 8 | Unclean hands / Waiver | As facts support |

Defenses not raised may be waived under FRCP 8(c) — err toward inclusion.

4. Counterclaims (if applicable)

• DJ of non-infringement (28 U.S.C. § 2201)
• DJ of invalidity
• State jurisdictional basis separately

5. Invalidity Contentions

Each contention requires: (a) reference identification, (b) prior art qualification, (c) claim chart.

Reference header: Title, authors/inventors, publication date, publisher/assignee, patent or publication number, prior art basis (AIA § 102(a)(1)/(a)(2) or pre-AIA § 102(a)/(b)/(e)/(g)).

§ 102 — Anticipation

One chart per reference per claim. Map every limitation.

| Claim Limitation | Prior Art Disclosure (col:line or pg:¶) | Analysis | |---|---|---| | [Preamble] | [Ref. p. X, ¶ Y] | [Disclosure explanation] | | [Element 1a] | [Ref. col. 3:12–25] | [Mapping] |

• Patents: presumed enabling
• NPL: address In re Wands enablement factors
• Show anticipation under any reasonable claim construction

§ 103 — Obviousness

Apply Graham v. John Deere (scope of art, differences, POSITA level, objective indicia). Motivation to combine per KSR v. Teleflex: explicit suggestion, problem-solution, obvious to try, known elements in established functions.

| Claim Limitation | Primary Ref. | Secondary Ref. | Combination Rationale | |---|---|---|---| | [Element 1a] | Ref. A, col. 2:10 | — | Taught by A alone | | [Element 1b] | — | Ref. B, p. 5 | POSITA would combine: [motivation] |

Rebut secondary considerations: commercial success (non-claimed features), long-felt need (art already suggested), failure of others (lack of motivation), unexpected results (predictable to POSITA).

§ 112 Contentions

| Ground | Standard | Identify | |---|---|---| | § 112(a) Written description | Inventor possessed full claim scope at filing | Broad terms unsupported by spec | | § 112(a) Enablement | No undue experimentation (Wands factors) | Claim breadth vs. spec disclosure | | § 112(b) Indefiniteness | Reasonably certain to POSITA (Nautilus v. Biosig) | Subjective/relative terms, unbounded functional language | | § 112(f) Means-plus-function | Spec must disclose corresponding structure | Nonce words without disclosed structure |

§ 101 — Subject Matter Eligibility (if applicable)

Alice/Mayo two-step: (1) directed to abstract idea, law of nature, or natural phenomenon? (2) inventive concept beyond routine/conventional activity?

6. Prayer for Relief

• No infringement of any valid, enforceable claim
• All asserted claims invalid under §§ 101, 102, 103, 112
• Patent unenforceable (if inequitable conduct pled)
• Dismissal with prejudice; costs and fees under § 285
• Declaratory relief; such other relief as the Court deems proper

7. Signature Block (FRCP 11)

• Attorney name, bar number, firm, address, contact
• Check local rules for corporate verification requirements

Guidelines

• Completeness — Federal Circuit may preclude invalidity theories omitted from initial contentions; PLR 3-3 omissions can be fatal at trial
• Concurrent production — prior art references must be produced to plaintiff with service of contentions (unless publicly available)
• Page limits — most districts cap at 35–50 pages; check local rules
• Pre-AIA vs. AIA — confirm effective filing date; pre-AIA § 102 subsections differ materially from AIA § 102(a)(1)/(a)(2)
• Internal consistency — admitted facts in § 2 must not contradict predicates in § 3 or § 5
• Verify citations — confirm statute versions, case holdings, and local PLR numbering for the specific district [VERIFY]
• Scope — U.S. federal courts only; ITC proceedings use different procedural rules