## Facts

- Standard Box Company supplied boxes to Mutual Biscuit Company under a written contract.
- On September 1, 1905, Standard Box sent a written proposal offering Mutual Biscuit an option to continue buying boxes for another year at existing contract prices with a 19½% discount.
- The option letter stated no deadline for acceptance.
- On April 18, 1906, the San Francisco earthquake and fire destroyed Mutual Biscuit’s plant; operations resumed in late August 1906.
- After the disaster, a box shortage developed and market prices rose above the 1905 contract prices.
- On July 25, 1906, Mutual Biscuit sent a letter purporting to accept the option at the prior prices and discount.
- Standard Box refused to sell at the 1905 prices, offering only then-current market prices.
- Mutual Biscuit bought boxes at market prices but later refused to pay the full balance, asserting it was entitled to option pricing and that any agreement to pay more was made under duress.

## Issues

1. Whether an option that specifies no acceptance deadline can be accepted about ten months after it is offered, or whether acceptance must occur within a reasonable time as a matter of law.
2. Whether Mutual Biscuit’s agreement to pay and payment of market prices, allegedly compelled by business necessity and lack of alternative suppliers, constituted duress allowing avoidance or restitution.

## Decision

- The appellate court affirmed the order denying a new trial, leaving judgment for Standard Box in place.
- The court held the July 25, 1906 acceptance was not within a reasonable time; therefore, no contract renewal at the option prices was formed.
- The court held Mutual Biscuit did not prove legal duress; purchasing at market prices under business pressure, without unlawful coercion, did not invalidate the obligation to pay.

## Legal Principles

- When a written offer or option states no time for acceptance, the law implies a requirement of acceptance within a reasonable time.
- A prolonged delay (here, roughly ten months) may be unreasonable as a matter of law, defeating formation based on late “acceptance.”
- External hardship and changed market conditions do not, by themselves, extend an option’s life when the time for acceptance is supplied by law.
- Parol evidence cannot be used to defeat legal implications arising from a written agreement’s silence where the law supplies the missing term.
- Duress requires wrongful or unlawful coercion; a seller’s refusal to contract at earlier prices, coupled with an offer to sell at market prices, is not duress absent improper threats or illegality.
- A party claiming a contractual right to favorable terms generally must seek judicial relief rather than accept different terms and later assert duress to avoid payment.

## Conclusion

The court held that an option without a stated deadline must be exercised within a reasonable time, and that severe business necessity and lack of practical alternatives do not establish duress when the seller merely insists on prevailing market prices without unlawful coercion.


Standard Box Co. v. Mutual Biscuit Co., 10 Cal. App. 746, 103 P. 938 (Cal. Dist. Ct. App. 1909)