Product Misuse. When a consumer misuses a product such that the misuse is the primary cause
of the injury, the producer may not be responsible, or liability may be lessened. Similarly, if
someone modifies a product to create the risk that causes the injury, liability may not hold.
Assumption of Risk. Especially concerns products that are unavoidably dangerous. One
category are products that, given the current state of science, cannot be made safer, and have
potentially harmful effects, such as pharmaceuticals. Another category are products such as
tobacco and alcohol, which are known to be dangerous in their side effects. When the injury is
suffered by an informed consumer, the producer is normally relieved of liability.
Add. Case: Glittenberg v. Doughboy Rec. (S.Ct., Mich., 1992)–In separate incidents, three
plaintiffs suffered major injuries by diving into shallow above-ground pools. All knew the water
was shallow and that diving was dangerous. They sued based on failure to warn adequately of
dangers. Defendants claimed that the risks were obvious.
Decision: Michigan high court held that a producer has no duty to warn of product’s potentially
Add. Case: Cotita v. Pharma-Plast (5th Cir., 1992)–Cotita, a RN, was providing nursing
services to an AIDS patient. A syringe made by Pharma-Plast was in its sterile packaging, but
was missing the protective cap that covers the needle. The improper packaging allowed the
needle to pierce the packaging and the protective gloves Cotita was wearing, which had the
patient’s blood on them. Cotita feared that he was exposed to AIDS, but tests showed him not
HIV- positive. He sued for mental anguish for fear of contracting AIDS. Jury awarded him
$150,000. That amount was reduced by 30 percent, the figure which the jury found reflected
Cotita’s negligence.
Decision: The Court of Appeals affirmed the lower court. Manufacturer was liable due to
Bulk-Supplier Doctrine and Sophisticated User Defense Applies to business purchasers of a
product. They are held to a higher level of knowledge about the dangers of a product than are
ordinary consumers, i.e., when a company routinely uses toxic chemicals in production, they are
expected to know the hazards of the chemicals and not be told at each sale. The supplier must
provide the buyer with information about the dangers, but is not responsible for what happens in
use in production once out of its control.
Add. Case: Haase v. Badger Mining (Sup. Ct., Wisc., 2004)–From 1980 to 1996, Badger
Mining supplied 99% pure silica sand to Neenah Foundry, which mixed the sand with other
materials to create molds for iron castings, such as manhole covers. The castings are usually
broken, reground, and the materials reused. Haase worked for years at Neenah, where he was
often in a dusty environment. In retirement, he was diagnosed with silicosis, a lung disease
caused by prolonged inhaling of silica particles. He sued Badger for products liability. The
lower courts dismissed Haase’s strict liability claim. He appealed.
Decision: Affirmed. Expert testimony showed that when Badger delivered the sand it was too
large to be inhaled. It was the processes at Neenah that crushed the sand into dust that caused