The Ninth Circuit, adopting the doctrine of Cook, reversed a district court denial of a motion to dismiss and remanded with instructions to enter summary judgment for the defendants, observing that plaintiffs’ failure to disclose the merits of their case after defendants had filed affidavits with their 12(b) motion ended plaintiffs’ entitlement to liberal construction of the pleadings in their favor. International Longshoremen’s & Warehousemen’s Union v. Kuntz, 334 F.2d 165 (9th Cir. 1964).
The “reasonable opportunity” language of Rule 12(b) is designed to prevent unfair surprise to the parties. Day-co cannot claim it was surprised because it made no effort to exclude the Firestone affidavits, but, instead, responded with its own. Under the circumstances, the district court was required to proceed under Rule 56, and notice to the parties that it was so doing would merely have informed them of what they should already have known.
The cases cited by Dayco as establishing a contrary rule are all distinguishable. Our own case of Sims v. Mercy Hospital of Monroe, 451 F.2d 171 (6th Cir. 1971), did not involve affidavits at all. In Sims, the trial judge relied upon a statement made by the attorney for the plaintiff at oral argument on a 12(b)(6) motion and without notice to anyone, entered summary judgment for the defendant. The plaintiff in that case could legitimately claim that he was taken by surprise by the conversion of that motion. In Johnson v. RAC Corp., 491 F.2d 510 (4th Cir. 1974), by holding in abeyance a plaintiff’s efforts at discovery, the court was held to have denied him a “reasonable opportunity” to file affidavits counter to the one defendant had filed during the pendency of a motion to dismiss. Scott v. Courtesy Inns, Inc., 472 F.2d 563 (5th Cir. 1973), also involved interrogatories which had been suppressed upon “vague and conelusory objections.” In Bowdidge v. Lehman, 252 F.2d 366 (6th Cir. 1958), the district court entered summary judgment on its own motion on a record without depositions, admissions or affidavits, and without notice to the parties, neither of whom had filed a motion to dismiss or for other summary relief. In Dale v. Hahn, 440 F.2d 633 (2d Cir. 1971), it is not clear whether the district court granted a motion to dismiss or entered summary judgment. The plaintiff had filed no affidavits, and the court, in dismissing the complaint, made an adverse factual finding on defendant’s affidavit alone. In reversing, the court of appeals said that the trial court should have given “some indication” that it was considering summary judgment. Finally in Costen v. Pauline’s Sportswear, Inc., 391 F.2d 81 (9th Cir. 1968), the court expressly found that the plaintiff had been misled by the proceedings and did not have a reasonable opportunity to file supplementary material.
Whether notice of conversion is required or not depends on the facts and circumstances of each case. Where one party is likely to be surprised by the proceedings, notice is required. Since Dayco participated in the pretrial proceedings and filed counter-affidavits, it cannot claim unfair surprise when the district court converted the motion to dismiss to one for summary judgment.2
FRAUDULENT CONCEALMENT
All parties agree that if plaintiff has a cause of action, it arose no later than 1961 when Dayco sold its tire manufacturing facilities to Firestone for less than their market value. Accordingly, the four year statute of limitations of the Clayton Act, § 4B, 15 U.S.C. § 15b, is
2
We further observe that after entry of judgment, Dayco did not ask the court to reconsider its judgment or ask to submit additional material. Even on appeal, Dayco does not indicate what other material it would file if we were to reverse and remand this case. Although these steps are not prerequisites to appeal, the fact that Dayco did not pursue them further confirms our conviction that notice of conversion by the district court would have served no useful purpose in this case.