This appeal involves a personal injury action brought by John Jeanetta and Raymond Oney against several chemical companies who manufactured toluene diisocya-nate (TDI). Both plaintiffs alleged they incurred permanent lung damage by reason of their exposure to TDI while working for Whirlpool Corporation in Minnesota. The trial court, the Honorable James Rosen-baum, entered summary judgment for the defendants on the grounds that plaintiffs’ claims were barred by the Minnesota stat *398 ute of limitations. 1 We reverse and remand for a plenary trial. 2
Jeanetta and Oney were both exposed to TDI shortly after it was introduced in the Whirlpool plant in 1962. The chemical was mixed to create a foam-like substance used to insulate freezer cabinets. Both Jeanetta and Oney brought their claims on September 27,1984. They allege that they did not know until April of 1984 that their permanent respiratory ailment was causally related to TDI. Based upon affidavits and depositions of the plaintiffs, the trial court found that the plaintiffs both knew of the physical injuries and the causal relationship of TDI no later than 1972. The trial court rejected the plaintiffs’ argument that although they were aware of their injury in the form of sensitization to TDI, they did not know that their respiratory injuries were or could be permanent. On appeal the plaintiffs also claim, as they did in the trial court, that they did not know until 1984 that their permanent respiratory ailment was causally related to the earlier exposure to TDI.
Under Minnesota law, two elements must be satisfied under the discovery rule before a cause of action accrues in cases involving injuries caused by a defective product: (1) a cognizable physical manifestation of the disease or injury, and (2) evidence of a causal connection between the injury or disease and the defendant’s product, act, or omission.
Karjala v. Johns-Manville Products Corp.,
The joint complaints allege that plaintiffs suffered a permanent respiratory impairment. The evidence shows that both Jean-etta and Oney manifested symptoms after their initial exposure to TDI when they were employed by Whirlpool in 1962. However, the evidence is questionable whether they knew or should have known those symptoms were the manifestation of harm or impairment for which they now claim damages,
Karjala,
The evidence shows that five years after Jeanetta’s initial exposure to TDI, he went to see a doctor because of the symptoms he was manifesting and the doctor could find nothing wrong with him at that time. Similarly, Oney was told by Whirlpool’s company doctor that there was no correlation between the symptoms he was manifesting and TDI. Under these circumstances, it cannot be said as a matter of law that plaintiffs had knowledge of the cause of their medical problems at the time found by the district court. In
Brazzell v. United States,
“[W]here the issue of limitations involve determinations [of when a claim begins to accrue], summary judgment cannot be granted unless the evidence is so clear that there is no genuine factual issue and the determinations can be made as a matter of law.”
Lundy,
Notes
. In view of its ruling on summary judgment and based upon plaintiffs’ knowledge of their injuries and the alleged causal relationship of TDI on or before 1972, the trial court did not resolve which Minnesota statute applied. Under Minn.Stat. 541.05, subd. 2, strict liability claims are subject to a four year statute of limitations if they arose on or after April 15, 1978. Strict liability claims accruing before that date tire generally fixed by a six year limitation period. The court did not determine whether Sec. 2-725 of the Uniform Commercial Code (Minn.Stat. 336.2-725) which provides a four year limitation to claims for breach of implied warranty applies to product liability-based breach of warranty claims.
. Defendants assert on appeal that plaintiffs’ notice of appeal is not timely. Summary judgment was entered against plaintiffs on June 17, 1986. Prior to that time plaintiffs’ claims were joined in an amended petition with thirty-two other parties. On October 21, 1986, plaintiffs requested the trial court to certify an appealable order under Fed.R.Civ.P. 54(b). Plaintiffs filed an appeal within thirty days of this order. Defendants claim that the parties were notified by the district court clerk that the trial court planned to sever the suits for trial and on that basis plaintiffs’ claims stand alone and they should have appealed within thirty days of June 17, 1986. We disagree. Plaintiffs appeal from a multi-party suit. The mere fact that the trial court planned to sever them for trial is immaterial. No order had yet been entered. We therefore hold that plaintiffs filed a timely notice of appeal to the final order certified under Fed.R. Civ.P. 54(b).
.
See also Corrigan v. Burlington Northern R.R., Inc.,
Construing the evidence most favorably to plaintiff, the court finds that a material issue of fact remains as to when plaintiff became aware that he had work-related contact dermatitis. While plaintiff gave a statement back in 1965 about a "skin condition” he contracted, the record at this point does not clearly show that he knew that this rash was the same skin disease for which he now claims damages. See Gulf, Colorado & Sante Fe Railway Co. v. McClelland,355 F.2d 196 (5th Cir.1966). Cf. Coots v. Southern Pacific Co.,49 Cal.2d 805 ,322 P.2d 460 (1958) (Limitations period under FELA did not begin to run for injuries due to dermatitis until condition became quite severe and debilitating). Nor do the reports filed by Drs. Anderson and Ravits after plaintiff began this litigation demonstrate that plaintiff was informed that he had contact dermatitis prior to Dr. Brennan's 1982 report. Various other railroad reports filed over the years allude merely to a “skin rash” or "eczema”.
Corrigan,
. Given our decision, we need not pass upon plaintiffs' claim of fraudulent concealment. We note in passing, however, that fraudulent concealment will never be a viable claim where the discovery rule is involved. A cause of action accrues when a plaintiff is aware of the facts necessary to plead a prima facie case. If those facts have been fraudulently concealed from a plaintiff, the cause of action cannot accrue and, thus, there is nothing to be tolled.
