A more thorough explanation:

Definition: The all-steps rule is a doctrine in patent law that states for a method or process claim to be considered infringed by an accused process, the accused process must have every step and limitation of the infringed claim or an equivalent. This means that if even one step is missing or not equivalent, there is no infringement.

Example: Let's say a company has a patent for a method of making a cake that involves mixing flour, sugar, eggs, and milk, and then baking it in an oven at 350 degrees for 30 minutes. Another company creates a similar cake but only bakes it for 20 minutes. This would not be considered infringement because the accused process does not have every step and limitation of the infringed claim.

Explanation: The all-steps rule is important in patent law because it ensures that patent holders have exclusive rights to their inventions. It also provides clarity for companies and individuals who may be accused of infringement, as they can determine whether their process meets all the requirements of the patent claim. In the example above, the accused process did not meet all the requirements of the patent claim, so it would not be considered infringement.