Narrowing Reissue

A reissue proceeding under 35 U.S.C. § 251 allows a patent owner to correct a patent that, due to error, is wholly or partly inoperative or invalid: REISSUE OVERVIEW: the patent owner surrenders the original patent and the USPTO reissues it with corrected claims and/or specification; all original patent rights (priority date, continuation relationships) are preserved; the reissued patent receives a new RE patent number (e.g., RE12345); NARROWING REISSUE: the corrected claims are NARROWER than the original claims; no subject matter is added to the specification (no new matter); the timing: can be filed at ANY time during the remaining patent term; BROADENING REISSUE: the corrected claims are BROADER than the original claims (covering more territory than the issued claims); CRITICAL TIMING RULE: a broadening reissue MUST be filed within 2 years of the original patent grant; after 2 years, NO broadening of claims is permitted; the 2-year clock starts from the date of grant of the ORIGINAL patent (not any reissue); COMPARING NARROWING vs. BROADENING: narrowing reissue = no time limit; anytime during term; broadening reissue = 2-year deadline from grant; WHY NARROWING?: (a) the issued claims are broader than the inventor is entitled to (due to overlooked prior art); (b) a claim element was drafted with ambiguous language that may be interpreted broader than intended; (c) a § 112(b) indefiniteness problem in certain claim language; (d) the owner wants to surrender a broader claim to a specific scope that does not read on a defendant's product (rare — usually no benefit); COMBINED NARROWING + BROADENING: a reissue may simultaneously narrow some claims and broaden others — as long as the broadening aspect complies with the 2-year rule.

Section 251 requires that the patent is inoperative or invalid 'through error' — the error requirement has important nuances: ERROR REQUIREMENT: the error must be an error by the applicant or attorney — inadvertent claim scope is the paradigm; claiming too broadly when prior art would have anticipated or rendered obvious the claim = error; POST-AIA ERROR STANDARD: § 251 was amended post-AIA to remove the 'without deceptive intention' language; any error (inadvertent or negligent) is correctable via reissue; intentional strategic overclaiming may still fail the error requirement; TYPES OF ERRORS THAT SUPPORT NARROWING REISSUE: (a) OVERLOOKED PRIOR ART: attorney or applicant was not aware of prior art during prosecution; if the overlooked art anticipates or renders obvious the issued claims, the claims are technically invalid; reissue corrects by narrowing to distinguish the art; (b) CLAIM DRAFTING ERROR: attorney drafted a claim using language broader than intended; example: claim recites 'a fastener' when intended to recite 'a threaded fastener'; (c) SPECIFICATION SUPPORT: the issued claims may be broader than the specification actually supports (§ 112(a)); narrowing to what the specification supports; (d) TRANSLATION/NATIONAL PHASE ERROR: PCT applications translated into national phase may have claims broader than intended due to translation; (e) § 101 ELIGIBILITY: some practitioners file narrowing reissue to add elements that distinguish from abstract ideas post-Alice; WHAT IS NOT AN ERROR: a deliberate claim drafting decision (even if retrospectively unwise) may not constitute error; RECAPTURE RULE: if the original claims were narrowed during prosecution (to overcome a rejection), a reissue cannot recapture the surrendered subject matter; original prosecution history limitations bind the reissued patent.

Narrowing reissue is an ex parte proceeding before the USPTO: FILING: the patent owner (or assignee) files a reissue application with: (a) a declaration identifying the error and stating it was made without deceptive intention; (b) proposed amended claims (narrower than issued); (c) the original patent (original patent is surrendered upon reissue); (d) required fees; PROSECUTION: reissue prosecution is similar to original prosecution; a USPTO examiner reviews the application; examiner examines ALL claims (including any unchanged claims); prior art search is conducted again; examiner may: allow the narrowed claims; reject claims for prior art, § 101, § 112; require further narrowing; THIRD-PARTY PROTESTS: any person may file a protest against a pending reissue within the prosecution (limited participation); PUBLICATION: reissue applications are published 18 months after filing; EXAMINATION STANDARDS: the examiner applies the same standards as original examination; broadening claims added to a post-2-year reissue are rejected; REISSUE OATH: the patent owner must sign a declaration stating the error and that it was unintentional; RESULT: if approved, the USPTO issues a new reissued patent (RE number) with the corrected claims; the original patent is cancelled; PROSECUTION HISTORY ESTOPPEL: narrowing amendments made during reissue prosecution create prosecution history estoppel for the reissued patent; these estoppels may affect the doctrine of equivalents for the reissued claims; THIRD-PARTY IMPACT: a reissue disclaimer of subject matter creates public domain; competitors who relied on that subject matter being public during the reissue prosecution may have intervening rights.

Intervening rights protect parties who relied on the broader scope of the original patent before the reissue narrowed it: STATUTORY INTERVENING RIGHTS (35 U.S.C. § 252): absolute intervening right: a person who, prior to the grant of a reissue patent, made, purchased, offered to sell, or used the invention covered by the ORIGINAL patent's broader claims may continue to use those SPECIFIC articles after reissue; protects the specific infringing articles in existence before reissue; EQUITABLE INTERVENING RIGHTS: the court may also grant broader equitable intervening rights: protect investments made in substantial preparation to use the original broader claims; may allow continued infringement beyond the specific pre-reissue articles; broader than absolute intervening rights; discretionary; EXAMPLE: Original claim: 'A widget comprising a fastener.' Reissued claim (narrower): 'A widget comprising a threaded fastener.' A competitor made 1,000 widgets with non-threaded fasteners before the reissue (relying on the broad original claim). Absolute right: the competitor may continue to sell those 1,000 widgets. Equitable right: may allow continued manufacture if substantial investments were made; BUT: the reissued narrower claim may not even cover non-threaded fasteners — making infringement analysis irrelevant; PRACTICAL IMPLICATION: a patent owner should consider whether the narrowing reissue will create significant intervening rights before filing; if the narrowing is slight, intervening rights may be minimal; DIFFERENCE FROM DISCLAIMER INTERVENING RIGHTS: § 252 governs reissue intervening rights; § 41(c)(2) governs revival-related intervening rights; both protect good-faith reliance on the lapsed or broader scope.

Patent owners have several tools for post-grant correction, each suited to different scenarios: NARROWING REISSUE vs. STATUTORY DISCLAIMER (§ 253): disclaimer: removes specific claims entirely; no examination; irrevocable; fast (no prosecution); reissue: replaces the patent with corrected claims; examination by USPTO; subject to prosecution history estoppel; results in a reissued patent, not a void claim; WHEN TO CHOOSE REISSUE OVER DISCLAIMER: if you want to amend the claim language rather than simply eliminate it — use reissue; if you want to eliminate specific claims without examination or risk — use disclaimer; NARROWING REISSUE vs. EX PARTE REEXAMINATION (§ 302): reexamination: third-party or patent owner request based on prior art; examiner-driven; corrects claims based on prior art; focus on §§ 102 and 103 only; reissue: owner-driven; can correct for prior art AND § 101 AND § 112 errors; broader correction scope; NARROWING REISSUE vs. CLAIM AMENDMENT IN IPR/PGR: in IPR/PGR proceedings, the patent owner may propose substitute claims (one-for-one substitution; must narrow); the motion to amend must show the substitute claims are patentable and do not introduce new matter; more limited than reissue; BROADENING REISSUE (COMPARISON): can recapture unclaimed subject matter from specification within 2 years; often used when prosecution resulted in claims narrower than the specification supports; most reissues are combined: some claims broadened, others narrowed; APPLICATION TO CONTINUATION STRATEGY: if the patent is still in force and related applications are pending, continuation prosecution may be more flexible than reissue (no error requirement; new matter allowed if supported by specification) — but continuation claims must be filed before the original patent issues.