BASICS: “No reissued patent shall be granted enlarging the scope of the claims of the original patent unless applied for within two years from the grant of the original patent.” 35 U.S.C. § 251. Claim-by-claim analysis. Arcelormittal II (Fed. Cir. 05/12/15) (all but two reissue claims invalid for broadening). Generally, a reissue is available to correct an error made by the patentee. Any claim sought in a reissue filed after two years from the grant of the original patent is invalid if broader than the original claim. Reexamination may not broaden claim. Id. at §§ 305, 314. A continuing reissue application may add broadened claims after the two-year limit even if those broadened claims are unrelated to the broadened claims filed within the two-year limit. In re Staats (Fed. Cir. 03/05/12). “Whether amendments made during reissue enlarge the scope of the claim, and therefore violate § 251, is a matter of claim construction, which we review de novo, while giving deference to subsidiary factual determinations.” Arcelormittal II (Fed. Cir. 05/12/15) (citing Teva).
AIA: No amended claim in IPR or PGR may enlarge scope of the claims. 35 U.S.C. §§ 316(d), 326(d) (AIA).
Claim Is Broadened If It Covers Something Different: “A claim of a reissue application is broader in scope than the original claims if it contains within its scope any conceivable apparatus or process which would not have infringed the original patent. A reissue claim that is broader in any respect is considered to be broader than the original claims even though it may be narrower in other respects.” Tillotson, Ltd. v. Walbro Corp., 831 F.2d 1033, 1037 n.2 (Fed. Cir. 1987); accordArcelormittal II (Fed. Cir. 05/12/15) (independent claim broadened, even without being amended, by addition of dependent claim with range broader than original claim had earlier been construed to cover); In re Cuozzo (Fed. Cir. 02/04/15) (2-1) (applying same test to inter partes review), rehearing en banc denied (Fed. Cir. 07/08/15) (6-5); new panel opinion (Fed. Cir. 07/08/15), aff’d on other grounds (U.S. 06/20/2016); In re Reiffin (Fed. Cir. 07/27/09); see alsoBrady Constr. (Fed. Cir. 08/15/08) (non-precedential) (invalidating reissue claim that required (among other things) a stud having at least one hole (but having no restriction that the hole be pre-existing) where original claim required pre-existing hole); In re Bennett (Fed. Cir. 06/28/85) (en banc) (“‘Conveyor means’ is broader in scope than ‘a continuously running, in operation, conveyor belt’.”)