How John Harvey Kellogg Invented Flaked Breakfast Cereals

A foundational 1896 patent describing the process of creating thin, toasted flakes from cooked grains, which launched the modern breakfast cereal industry.

What it covers

The patent details a mechanical process for transforming cooked wheat or other grains into thin, crispy flakes. The grain is first cooked, then passed through rollers to flatten it into thin pieces. These pieces are then toasted to achieve a specific texture and flavor profile that remains shelf-stable and ready to eat with milk.

What it doesn't cover

• —Does not cover the use of non-grain ingredients like sugar coatings or artificial flavorings.
• —Does not cover extruded cereal shapes like loops, puffs, or spheres.
• —Does not cover the chemical fortification of cereals with vitamins or minerals.

The clever bit

The innovation was in the mechanical rolling process that turned cooked, dense grain into a thin, fragile flake that would toast evenly and stay crisp when submerged in liquid.

Why it matters

This patent marks the birth of the ready-to-eat breakfast cereal category. It shifted the American diet from hot, labor-intensive porridges to convenient, processed grain products, creating a massive global industry centered in Battle Creek, Michigan.

Real-world examples

• 1.Kellogg's Corn Flakes
• 2.Generic toasted wheat flakes
• 3.Early 20th-century breakfast grain products