entered final judgment." Id. at 274. In allowing a premature notice of appeal to mature and thereafter trigger appellate jurisdiction, the Court explained:
Added to the Federal Rules in 1979, Rule 4(a)(2) was intended to codify a general practice in the courts of appeals of deeming certain premature notices of appeal effective.
....
. . . Under Rule 4(a)(2), a premature notice of appeal does not ripen until judgment is entered. Once judgment is entered, the Rule treats the premature notice of appeal "as filed after such entry." Thus, even if a bench ruling in a given case were not "final" within the meaning of § 1291, Rule 4(a)(2) would not render that ruling appealable in contravention of § 1291. Rather, it permits a premature notice of appeal from that bench ruling to relate forward to judgment and serve as an effective notice of appeal from the final judgment. ....
. . . Rule 4(a)(2) was intended to protect the unskilled litigant who files a notice of appeal from a decision that he reasonably but mistakenly believes to be a final judgment, while failing to file a notice of appeal from the actual final judgment.
This is not to say that Rule 4(a)(2) permits a notice of appeal from a clearly interlocutory decision--such as a discovery ruling or a sanction order under Rule 11 of the Federal Rules of Civil Procedure--to serve as a notice of appeal from the final judgment. A belief that such a decision is a final judgment would not be reasonable. In our view, Rule 4(a)(2) permits a notice of appeal from a nonfinal decision to operate as a notice of appeal from the final judgment only when a district court announces a decision that would be appealable if immediately followed by the entry of judgment. In these instances, a litigant’s confusion is understandable, and permitting the notice of appeal to become effective when judgment is entered does not catch the appellee by surprise. Little would be accomplished by prohibiting the court of appeals from reaching the merits of such an appeal.
Id. at 273-76.
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