Crown Cork & Seal Co. v. Ferdinand Gutmann Co.

Background

A company asserting patents based on an inventor named Warth sued a competitor for using small paper or foil disks (center spots) on cork cushions inside bottle crown caps. The patents in suit were a reissue patent and a later divisional patent that covered methods including heating the cork pads before applying the spots. The district court found both patents valid and infringed, but the court of appeals reversed, holding the divisional claims invalid because Warth waited more than two years to claim them.

Reasoning

The Supreme Court limited its review to whether an applicant must show an excuse for more than two years’ delay in presenting claims in a divisional application when no intervening adverse rights exist. The Court explained that Warth had continuously disclosed the heating method to the patent office and had not abandoned it. It held that Webster Co. v. Splitdorf does not require an excuse in the absence of intervening adverse rights, reversed the appeals court’s ruling on that point, and remanded the case for further proceedings.

Real world impact

The ruling means that, when an invention was continuously disclosed to the patent office and no one else acquired intervening rights, an inventor can later present divisional claims even after a delay exceeding two years without first proving a special excuse. This reduces the ability of competitors to defeat divisional claims solely by pointing to delay. The Court did not decide other issues, so further factual or legal questions remain for the lower courts.

Dissents or concurrances

Justice Black dissented, arguing the decision departs from earlier cases that treated long delay, laches, and public rights as separate grounds to bar late divisional claims and warning this could let inventors extend practical monopoly periods and harm the public interest.